ISL21080 Datasheet

Intersil

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Datasheet

FN6934 Rev.7.00 Page 1 of 23
Sep 28, 2018
FN6934
Rev.7.00
Sep 28, 2018
ISL21080
300nA NanoPower Voltage References
DATASHEET
The ISL21080 analog voltage references feature low supply
voltage operation at ultra-low 310nA typical, 1.5µA maximum
operating current. Additionally, the ISL21080 family features
ensured initial accuracy as low as ±0.2% and 50ppm/°C
temperature coefficient.
These references are ideal for general purpose portable
applications to extend battery life at lower cost. The ISL21080
is provided in the industry standard 3 Ld SOT-23 pinout.
The ISL21080 output voltages can be used as precision
voltage sources for voltage monitors, control loops, standby
voltages for low power states for DSP, FPGA, Datapath
Controllers, microcontrollers, and other core voltages: 0.9V,
1.024V, 1.25V, 1.5V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V, and
5.0V.
Special Note: Post-assembly X-ray inspection may lead to permanent
changes in device output voltage and should be minimized or
avoided. For further information, see Applications Information” on
page 15 and AN1533, “X-Ray Effects on Intersil FGA References”.
Applications
Energy harvesting applications
Wireless sensor network applications
Low power voltage sources for controllers, FPGA, ASICs, or
logic devices
Battery management/monitoring
Low power standby voltages
•Portable Instrumentation
Consumer/medical electronics
Wearable electronics
Lower cost industrial and instrumentation
Power regulation circuits
Control loops and compensation networks
LED/diode supply
Features
Reference output voltage . . . . . . . . 0.900V, 1.024V, 1.250V,
1.500V, 2.048V, 2.500V, 3.000V, 3.300V, 4.096V, 5.000V
Initial accuracy:
- ISL21080-09 and -10 . . . . . . . . . . . . . . . . . . . . . . . . . ±0.7%
- ISL21080-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.6%
- ISL21080-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.5%
- ISL21080-20 and -25 . . . . . . . . . . . . . . . . . . . . . . . . . ±0.3%
- ISL21080-30, -33, -41, and -50 . . . . . . . . . . . . . . . . . ±0.2%
Input voltage range:
- ISL21080-09 . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0V to 5.5V
- ISL21080-10, -12, -15, -20 and -25. . . . . . . . . 2.7V to 5.5V
- ISL21080-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2V to 5.5V
- ISL21080-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5V to 5.5V
- ISL21080-41. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V to 8.0V
- ISL21080-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V to 8.0V
Output voltage noise . . . . . . . . . . . . .30µVP-P (0.1Hz to 10Hz)
Supply current . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5µA (max)
Tempco . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50ppm/°C
Output current capability . . . . . . . . . . . . . . . . . . . . . . . . ±7mA
Operating temperature range. . . . . . . . . . . . . -40°C to +85°C
Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Ld SOT-23
Pb-Free (RoHS compliant)
Related Literature
For a full list of related documents, visit our website:
ISL21080 family product page
FIGURE 1. IIN vs VIN, THREE UNITS
0
100
200
300
400
500
VIN (V)
IN (nA)
UNIT 1
UNIT 3
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5
UNIT 2
ISL21080
FN6934 Rev.7.00 Page 2 of 23
Sep 28, 2018
Pin Configuration
3 LD SOT-23
TOP VIEW
1
2
3
VOUT
GND
VIN
Pin Descriptions
PIN NUMBER PIN NAME DESCRIPTION
1V
IN Input Voltage Connection
2V
OUT Voltage Reference Output
3 GND Ground Connection
Ordering Information
PART NUMBER
(Notes 2, 3)
PART
MARKING
(Note 4)
VOUT OPTION
(V)
GRADE
(%)
TEMP. RANGE
(°C)
TAPE AND REEL
(UNITS) (Note 1)
PACKAGE
(RoHS Compliant)
PKG.
DWG. #
ISL21080DIH309Z-TK BCLA 0.9 ±0.7 -40 to +85 1k 3 Ld SOT-23 P3.064A
ISL21080DIH310Z-TK BCMA 1.024 ±0.7 -40 to +85 1k 3 Ld SOT-23 P3.064A
ISL21080DIH312Z-TK BCNA 1.25 ±0.6 -40 to +85 1k 3 Ld SOT-23 P3.064A
ISL21080CIH315Z-TK BCDA 1.5 ±0.5 -40 to +85 1k 3 Ld SOT-23 P3.064A
ISL21080CIH315Z-T7A BCDA 1.5 ±0.5 -40 to +85 250 3 Ld SOT-23 P3.064A
ISL21080CIH320Z-TK BCPA 2.048 ±0.3 -40 to +85 1k 3 Ld SOT-23 P3.064A
ISL21080CIH325Z-TK BCRA 2.5 ±0.3 -40 to +85 1k 3 Ld SOT-23 P3.064A
ISL21080CIH330Z-TK BCSA 3.0 ±0.2 -40 to +85 1k 3 Ld SOT-23 P3.064A
ISL21080CIH333Z-TK BCTA 3.3 ±0.2 -40 to +85 1k 3 Ld SOT-23 P3.064A
ISL21080CIH341Z-TK BCVA 4.096 ±0.2 -40 to +85 1k 3 Ld SOT-23 P3.064A
ISL21080CIH350Z-TK BCWA 5.0 ±0.2 -40 to +85 1k 3 Ld SOT-23 P3.064A
ISL2108009EV1Z ISL21080DIH309Z Evaluation Board
ISL2108010EV1Z ISL21080DIH310Z Evaluation Board
ISL2108012EV1Z ISL21080DIH312Z Evaluation Board
ISL2108015EV1Z ISL21080DIH315Z Evaluation Board
ISL2108020EV1Z ISL21080DIH320Z Evaluation Board
ISL2108025EV1Z ISL21080DIH325Z Evaluation Board
ISL2108030EV1Z ISL21080DIH330Z Evaluation Board
ISL2108033EV1Z ISL21080DIH333Z Evaluation Board
ISL2108040EV1Z ISL21080DIH341Z Evaluation Board
ISL2108050EV1Z ISL21080DIH350Z Evaluation Board
NOTES:
1. Refer to TB347 for details about reel specifications.
2. These Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate
plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Pb-free products are
MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), refer to the ISL21080DIH309, ISL21080DIH310, ISL21080DIH312, ISL21080CIH315, ISL21080CIH320,
ISL21080CIH325, ISL21080CIH330, ISL21080CIH333, ISL21080CIH341, and ISL21080CIH350 product information pages. For more information
about MSL, see TB363.
4. The part marking is located on the bottom of the part.
ISL21080
FN6934 Rev.7.00 Page 3 of 23
Sep 28, 2018
Absolute Maximum Ratings Thermal Information
Max Voltage
VIN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +6.5V
V
IN to GND (ISL21080-41 and 50 only) . . . . . . . . . . . . . . . -0.5V to +10V
V
OUT to GND (10s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to VOUT +1V
V
OUT to GND (10s)
ISL21080-41 and 50 only . . . . . . . . . . . . . . . . . . . . . . -0.5V to +5.1V
ESD Ratings
Human Body Model (Tested to JESD22-A114) . . . . . . . . . . . . . . . . . . 5kV
Machine Model (Tested to JESD22-A115). . . . . . . . . . . . . . . . . . . . . 500V
Charged Device Model (Tested to JESD22-C101) . . . . . . . . . . . . . . . . 2kV
Latch-Up (Tested per JESD-78B; Class 2, Level A) . . . . . . . . . . . . . . 100mA
Environmental Operating Conditions
X-Ray Exposure (Note 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mRem
Thermal Resistance (Typical) JA (°C/W) JC (°C/W)
3 Lead SOT-23 (Notes 6, 7). . . . . . . . . . . . . . 275 110
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .+107°C
Continuous Power Dissipation (TA = +85°C) . . . . . . . . . . . . . . . . . . . 99mW
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493
Recommended Operating Conditions
Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
5. Measured with no filtering, distance of 10” from source, intensity set to 55kV and 70µA current, 30s duration. Other exposure levels should be
analyzed for Output Voltage drift effects. See Applications Information” on page 15.
6. JA is measured with the component mounted on a high-effective thermal conductivity test board in free air. See TB379 for details.
7. For JC, the “case temp” location is taken at the package top center.
Electrical Specifications (ISL21080-09, VOUT = 0.9V) VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to +85°C.
PARAMETER SYMBOL CONDITIONS
MIN
(Note 13)TYP
MAX
(Note 13)UNIT
Output Voltage VOUT 0.9 V
VOUT Accuracy at TA = +25°C (Notes 8, 9)V
OA -0.7 +0.7 %
Output Voltage Temperature Coefficient
(Note 10)
TC VOUT 50 ppm/°C
Input Voltage Range VIN 2.0 5.5 V
Supply Current IIN 0.35 1.5 µA
Line Regulation VOUT /VIN 2V VIN 5.5V 30 350 µV/V
Load Regulation VOUT/IOUT Sourcing: 0mA IOUT 10mA 6 100 µV/mA
Sinking: -10mA IOUT 0mA 23 350 µV/mA
Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 30 mA
Turn-On Settling Time tRVOUT = ±0.1% with no load 1 ms
Ripple Rejection f = 120Hz -40 dB
Output Voltage Noise eN0.1Hz f 10Hz 40 µVP-P
Broadband Voltage Noise VN10Hz f 1kHz 10 µVRMS
Noise Density f = 1kHz 1.1 µV/Hz
Thermal Hysteresis (Note 11)VOUT/TATA = +125°C 100 ppm
Long Term Stability (Note 12)VOUT/tT
A = +25°C 60 ppm
ISL21080
FN6934 Rev.7.00 Page 4 of 23
Sep 28, 2018
Electrical Specifications (ISL21080-10, VOUT = 1.024V) VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to +85°C.
PARAMETER SYMBOL CONDITIONS
MIN
(Note 13)TYP
MAX
(Note 13)UNIT
Output Voltage VOUT 1.024 V
VOUT Accuracy at TA = +25°C (Notes 8, 9)V
OA -0.7 +0.7 %
Output Voltage Temperature Coefficient
(Note 10)
TC VOUT 50 ppm/°C
Input Voltage Range VIN 2.7 5.5 V
Supply Current IIN 0.31 1.5 µA
Line Regulation VOUT /VIN 2.7V VIN 5.5V 80 350 µV/V
Load Regulation VOUT/IOUT Sourcing: 0mA IOUT 7mA 25 100 µV/mA
Sinking: -7mA IOUT 0mA 50 350 µV/mA
Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 50 mA
Turn-On Settling Time tRVOUT = ±0.1% with no load 4 ms
Ripple Rejection f = 120Hz -40 dB
Output Voltage Noise eN0.1Hz f 10Hz 30 µVP-P
Broadband Voltage Noise VN10Hz f 1kHz 52 µVRMS
Noise Density f = 1kHz 2.2 µV/Hz
Thermal Hysteresis (Note 11)VOUT/TATA = +165°C 100 ppm
Long Term Stability (Note 12)VOUT/tT
A = +25°C 50 ppm
Electrical Specifications (ISL21080-12, VOUT = 1.25V) VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to +85°C.
PARAMETER SYMBOL CONDITIONS
MIN
(Note 13)TYP
MAX
(Note 13)UNIT
Output Voltage VOUT 1.25 V
VOUT Accuracy at TA = +25°C (Notes 8, 9)V
OA -0.6 +0.6 %
Output Voltage Temperature Coefficient
(Note 10)
TC VOUT 50 ppm/°C
Input Voltage Range VIN 2.7 5.5 V
Supply Current IIN 0.31 1.5 µA
Line Regulation VOUT /VIN 2.7V VIN 5.5V 80 350 µV/V
Load Regulation VOUT/IOUT Sourcing: 0mA IOUT 7mA 25 100 µV/mA
Sinking: -7mA IOUT 0mA 50 350 µV/mA
Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 50 mA
Turn-On Settling Time tRVOUT = ±0.1% with no load 4 ms
Ripple Rejection f = 120Hz -40 dB
Output Voltage Noise eN0.1Hz f 10Hz 30 µVP-P
Broadband Voltage Noise VN10Hz f 1kHz 52 µVRMS
Noise Density f = 1kHz 1.1 µV/Hz
Thermal Hysteresis (Note 11)VOUT/TATA = +165°C 100 ppm
Long Term Stability (Note 12)VOUT/tT
A = +25°C 50 ppm
ISL21080
FN6934 Rev.7.00 Page 5 of 23
Sep 28, 2018
d
Electrical Specifications (ISL21080-15, VOUT = 1.5V) VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to +85°C.
PARAMETER SYMBOL CONDITIONS
MIN
(Note 13)TYP
MAX
(Note 13)UNIT
Output Voltage VOUT 1.5 V
VOUT Accuracy at TA = +25°C (Notes 8, 9)V
OA -0.5 +0.5 %
Output Voltage Temperature Coefficient
(Note 10)
TC VOUT 50 ppm/°C
Input Voltage Range VIN 2.7 5.5 V
Supply Current IIN 0.31 1.5 µA
Line Regulation VOUT /VIN 2.7V VIN 5.5V 80 350 µV/V
Load Regulation VOUT/IOUT Sourcing: 0mA IOUT 7mA 10 100 µV/mA
Sinking: -7mA IOUT 0mA 50 350 µV/mA
Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 50 mA
Turn-On Settling Time tRVOUT = ±0.1% with no load 4 ms
Ripple Rejection f = 120Hz -40 dB
Output Voltage Noise eN0.1Hz f 10Hz 30 µVP-P
Broadband Voltage Noise VN10Hz f 1kHz 52 µVRMS
Noise Density f = 1kHz 1.1 µV/Hz
Thermal Hysteresis (Note 11)VOUT/TATA = +165°C 100 ppm
Long Term Stability (Note 12)VOUT/tT
A = +25°C 50 ppm
Electrical Specifications (ISL21080-20, VOUT = 2.048V) VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to +85°C.
PARAMETER SYMBOL CONDITIONS
MIN
(Note 13)TYP
MAX
(Note 13)UNIT
Output Voltage VOUT 2.048 V
VOUT Accuracy at TA = +25°C (Notes 8, 9)V
OA -0.3 +0.3 %
Output Voltage Temperature Coefficient
(Note 10)
TC VOUT 50 ppm/°C
Input Voltage Range VIN 2.7 5.5 V
Supply Current IIN 0.31 1.5 µA
Line Regulation VOUT /VIN 2.7V VIN 5.5V 80 350 µV/V
Load Regulation VOUT/IOUT Sourcing: 0mA IOUT 7mA 25 100 µV/mA
Sinking: -7mA IOUT 0mA 50 350 µV/mA
Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 50 mA
Turn-On Settling Time tRVOUT = ±0.1% with no load 4 ms
Ripple Rejection f = 120Hz -40 dB
Output Voltage Noise eN0.1Hz f 10Hz 30 µVP-P
Broadband Voltage Noise VN10Hz f 1kHz 52 µVRMS
Noise Density f = 1kHz 1.1 µV/Hz
Thermal Hysteresis (Note 11)VOUT/TATA = +165°C 100 ppm
Long Term Stability (Note 12)VOUT/tT
A = +25°C 50 ppm
ISL21080
FN6934 Rev.7.00 Page 6 of 23
Sep 28, 2018
Electrical Specifications (ISL21080-25, VOUT = 2.5V) VIN = 3.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to +85°C.
PARAMETER SYMBOL CONDITIONS
MIN
(Note 13)TYP
MAX
(Note 13)UNIT
Output Voltage VOUT 2.5 V
VOUT Accuracy at TA = +25°C (Notes 8, 9)V
OA -0.3 +0.3 %
Output Voltage Temperature Coefficient
(Note 10)
TC VOUT 50 ppm/°C
Input Voltage Range VIN 2.7 5.5 V
Supply Current IIN 0.31 1.5 µA
Line Regulation VOUT /VIN 2.7V VIN 5.5V 80 350 µV/V
Load Regulation VOUT/IOUT Sourcing: 0mA IOUT 7mA 25 100 µV/mA
Sinking: -7mA IOUT 0mA 50 350 µV/mA
Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 50 mA
Turn-On Settling Time tRVOUT = ±0.1% with no load 4 ms
Ripple Rejection f = 120Hz -40 dB
Output Voltage Noise eN0.1Hz f 10Hz 30 µVP-P
Broadband Voltage Noise VN10Hz f 1kHz 52 µVRMS
Noise Density f = 1kHz 1.1 µV/Hz
Thermal Hysteresis (Note 11)VOUT/TATA = +165°C 100 ppm
Long Term Stability (Note 12)VOUT/tT
A = +25°C 50 ppm
Electrical Specifications (ISL21080-30, VOUT = 3.0V) VIN = 5.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to +85°C.
PARAMETER SYMBOL CONDITIONS
MIN
(Note 13)TYP
MAX
(Note 13)UNIT
Output Voltage VOUT 3.0 V
VOUT Accuracy at TA = +25°C (Notes 8, 9)V
OA -0.2 +0.2 %
Output Voltage Temperature Coefficient
(Note 10)
TC VOUT 50 ppm/°C
Input Voltage Range VIN 3.2 5.5 V
Supply Current IIN 0.31 1.5 µA
Line Regulation VOUT /VIN 3.2V VIN 5.5V 80 350 µV/V
Load Regulation VOUT/IOUT Sourcing: 0mA IOUT 7mA 25 100 µV/mA
Sinking: -7mA IOUT 0mA 50 350 µV/mA
Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 50 mA
Turn-On Settling Time tRVOUT = ±0.1% with no load 4 ms
Ripple Rejection f = 120Hz -40 dB
Output Voltage Noise eN0.1Hz f 10Hz 30 µVP-P
Broadband Voltage Noise VN10Hz f 1kHz 52 µVRMS
Noise Density f = 1kHz 1.1 µV/Hz
Thermal Hysteresis (Note 11)VOUT/TATA = +165°C 100 ppm
Long Term Stability (Note 12)VOUT/tT
A = +25°C 50 ppm
ISL21080
FN6934 Rev.7.00 Page 7 of 23
Sep 28, 2018
Electrical Specifications (ISL21080-33, VOUT = 3.3V) VIN = 5.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to +85°C.
PARAMETER SYMBOL CONDITIONS
MIN
(Note 13)TYP
MAX
(Note 13)UNIT
Output Voltage VOUT 3.3 V
VOUT Accuracy at TA = +25°C (Notes 8, 9)V
OA -0.2 +0.2 %
Output Voltage Temperature Coefficient
(Note 10)
TC VOUT 50 ppm/°C
Input Voltage Range VIN 3.5 5.5 V
Supply Current IIN 0.31 1.5 µA
Line Regulation VOUT /VIN 3.5 V VIN 5.5V 80 350 µV/V
Load Regulation VOUT/IOUT Sourcing: 0mA IOUT 10mA 25 100 µV/mA
Sinking: -10mA IOUT 0mA 50 350 µV/mA
Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 50 mA
Turn-On Settling Time tRVOUT = ±0.1% with no load 4 ms
Ripple Rejection f = 120Hz -40 dB
Output Voltage Noise eN0.1Hz f 10Hz 30 µVP-P
Broadband Voltage Noise VN10Hz f 1kHz 52 µVRMS
Noise Density f = 1kHz 1.1 µV/Hz
Thermal Hysteresis (Note 11)VOUT/TATA = +165°C 100 ppm
Long Term Stability (Note 12)VOUT/tT
A = +25°C 50 ppm
Electrical Specifications (ISL21080-41 VOUT = 4.096V) VIN = 5.0V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to +85°C.
PARAMETER SYMBOL CONDITIONS
MIN
(Note 13)TYP
MAX
(Note 13)UNIT
Output Voltage VOUT 4.096 V
VOUT Accuracy at TA = +25°C (Notes 8, 9)V
OA -0.2 +0.2 %
Output Voltage Temperature Coefficient
(Note 10)
TC VOUT 50 ppm/°C
Input Voltage Range VIN 4.5 8.0 V
Supply Current IIN 0.5 1.5 µA
Line Regulation VOUT /VIN 4.5 V VIN 8.0V 80 350 µV/V
Load Regulation VOUT/IOUT Sourcing: 0mA IOUT 10mA 10 100 µV/mA
Sinking: -10mA IOUT 0mA 20 350 µV/mA
Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 80 mA
Turn-On Settling Time tRVOUT = ±0.1% with no load 4 ms
Ripple Rejection f = 120Hz -40 dB
Output Voltage Noise eN0.1Hz f 10Hz 30 µVP-P
Broadband Voltage Noise VN10Hz f 1kHz 52 µVRMS
Noise Density f = 1kHz 1.1 µV/Hz
Thermal Hysteresis (Note 11)VOUT/TATA = +165°C 100 ppm
Long Term Stability (Note 12)VOUT/tT
A = +25°C 50 ppm
ISL21080
FN6934 Rev.7.00 Page 8 of 23
Sep 28, 2018
Electrical Specifications (ISL21080-50 VOUT = 5.0V) VIN = 6.5V, TA = -40°C to +85°C, IOUT = 0, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to +85°C.
PARAMETER SYMBOL CONDITIONS
MIN
(Note 13)TYP
MAX
(Note 13)UNIT
Output Voltage VOUT 5.0 V
VOUT Accuracy at TA = +25°C (Notes 8, 9)V
OA -0.2 +0.2 %
Output Voltage Temperature Coefficient
(Note 10)
TC VOUT 50 ppm/°C
Input Voltage Range VIN 5.5 8.0 V
Supply Current IIN 0.5 1.5 µA
Line Regulation VOUT /VIN 5.5 V VIN 8.0V 80 350 µV/V
Load Regulation VOUT/IOUT Sourcing: 0mA IOUT 10mA 10 100 µV/mA
Sinking: -10mA IOUT 0mA 20 350 µV/mA
Short-Circuit Current ISC TA = +25°C, VOUT tied to GND 80 mA
Turn-On Settling Time tRVOUT = ±0.1% with no load 4 ms
Ripple Rejection f = 120Hz -40 dB
Output Voltage Noise eN0.1Hz f 10Hz 30 µVP-P
Broadband Voltage Noise VN10Hz f 1kHz 52 µVRMS
Noise Density f = 1kHz 1.1 µV/Hz
Thermal Hysteresis (Note 11)VOUT/TATA = +165°C 100 ppm
Long Term Stability (Note 12)VOUT/tT
A = +25°C 50 ppm
NOTES:
8. Post-reflow drift for the ISL21080 devices ranges from 100µV to 1.0mV based on experimental results with devices on FR4 double sided boards. The
design engineer must take this into account when considering the reference voltage after assembly.
9. Post-assembly X-ray inspection may also lead to permanent changes in device output voltage and should be minimized or avoided. Initial accuracy
can change 10mV or more under extreme radiation. Most inspection equipment does not affect the FGA reference voltage, but if X-ray inspection is
required, it is advisable to monitor the reference output voltage to verify excessive shift has not occurred.
10. Over the specified temperature range. Temperature coefficient is measured by the box method whereby the change in VOUT is divided by the
temperature range; in this case, -40°C to +85°C = +125°C.
11. Thermal Hysteresis is the change of VOUT measured at TA = +25°C after temperature cycling over a specified range, TA. VOUT is read initially at
TA= +25°C for the device under test. The device is temperature cycled and a second VOUT measurement is taken at +25°C. The difference between
the initial VOUT reading and the second VOUT reading is then expressed in ppm. For TA = +125°C, the device under test is cycled from +25°C to
+85°C to -40°C to +25°C.
12. Long term drift is logarithmic in nature and diminishes over time. Drift after the first 1000 hours is approximately 10ppm/1khrs.
13. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
ISL21080
FN6934 Rev.7.00 Page 9 of 23
Sep 28, 2018
Typical Performance Characteristics Curves VOUT = 0.9V VIN = 3.0V, IOUT = 0mA,
TA = +25°C unless otherwise specified.
FIGURE 2. IIN vs VIN, THREE UNITS FIGURE 3. IIN vs VIN OVER-TEMPERATURE
FIGURE 4. LINE REGULATION, THREE UNITS FIGURE 5. LINE REGULATION OVER-TEMPERATURE
FIGURE 6. VOUT vs TEMPERATURE NORMALIZED to +25°C FIGURE 7. LINE TRANSIENT RESPONSE, WITH CAPACITIVE LOAD
0
0.1
0.2
0.3
0.4
0.5
0.6
2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2
IIN (µA)
VIN (V)
TYP
LOW
HIGH
VIN (V)
IIN (µA)
0
0.1
0.2
0.3
0.4
0.5
0.6
2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2
+85°C
-40°C +25°C
0.89980
0.89985
0.89990
0.89995
0.90000
0.90005
0.90010
0.90015
0.90020
2.02.42.83.23.64.04.44.85.2
0.9V AT VIN = 3.0V
VIN (V)
TYP
VOUT (V) NORMALIZED TO
HIGH
LOW
VIN (V)
VIN = 3.0V
VOUT (µV) NORMALIZED TO
-150
-100
-50
0
50
100
150
200
2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2
+25°C
+85°C
-40°C
0.8990
0.8995
0.9000
0.9005
0.9010
-40 -30 -20 -10 0 10 30 40 50 60 70 80
VOUT (V)
NORMALIZED TO +25°C
TEMPERATURE (°C)
TYP
HIGH
LOW
20
-200
-150
-100
-50
0
50
100
150
200
0 0.5 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
TIME (µs)
VIN = +0.3V
VIN = -0.3V
VOUT (mV)
1.0
ISL21080
FN6934 Rev.7.00 Page 10 of 23
Sep 28, 2018
FIGURE 8. LINE TRANSIENT RESPONSE FIGURE 9. LOAD REGULATION OVER-TEMPERATURE
FIGURE 10. LOAD TRANSIENT RESPONSE FIGURE 11. LOAD TRANSIENT RESPONSE
FIGURE 12. DROPOUT FIGURE 13. TURN-ON TIME
Typical Performance Characteristics Curves VOUT = 0.9V VIN = 3.0V, IOUT = 0mA,
TA = +25°C unless otherwise specified. (Continued)
-200
-150
-100
0
50
100
150
200
VIN = +0.3V
VIN = -0.3V
VOUT (mV)
-50
TIME (µs)
0 0.5 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.01.0
-500
0
500
-10-9-8-7-6-5-4-3-2 -1 1 3 5 7 910
LOAD (mA)
SINKING SOURCING
+25°C
+85°C
-40°C
VOUT (µV)
86420
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
TIME (ms)
012345678910
VOUT (mV)
ILOAD = +7mA
ILOAD = -7mA
-500
-400
-300
-200
-100
0
100
200
300
400
500
TIME (ms)
012345678910
VOUT (mV)
ILOAD = +50µA
ILOAD = -50µA
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
VOUT (V)
VIN (V)
NO LOAD 7mA
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 0.3 0.6 0.9 1.2 1.5
TIME (ms)
VOUT (V)
TYP HIGH
VDD
LOW
ISL21080
FN6934 Rev.7.00 Page 11 of 23
Sep 28, 2018
Typical Performance Characteristics Curves VOUT = 1.5V VIN = 3.0V, IOUT = 0mA, TA
= +25°C unless otherwise specified.
FIGURE 14. IIN vs VIN, THREE UNITS FIGURE 15. IIN vs VIN OVER-TEMPERATURE
FIGURE 16. LINE REGULATION, THREE UNITS FIGURE 17. LINE REGULATION OVER-TEMPERATURE
FIGURE 18. VOUT vs TEMPERATURE NORMALIZED to +25°C FIGURE 19. LINE TRANSIENT RESPONSE, WITH CAPACITIVE LOAD
0
100
200
300
400
500
VIN (V)
IN (nA)
UNIT 1
UNIT 3
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
UNIT 2
0
100
200
300
400
500
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
-40°C
+85°C
IN (nA)
VIN (V)
+25°C
1.49980
1.49985
1.49990
1.49995
1.50005
1.50010
1.50015
1.50020
(NORMAILIZED TO 1.5V AT VIN = 3V)
1.50000
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
VOUT (V)
UNIT 2
UNIT 3
UNIT 1
VIN (V)
-150
-125
-100
-75
-50
-25
0
25
50
75
100
125
150
2.73.13.53.94.34.75.15.5
(NORMALIZED TO VIN = 3V)
+85°C
+25°C
-40°C
OUT (µV)
V
VIN (V)
1.4995
1.4996
1.4997
1.4998
1.4999
1.5000
1.5001
1.5002
1.5003
1.5004
1.5005
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
VIN (V)
V
OUT (V)
UNIT 1
UNIT 3
UNIT 2
CL= 500pF
VIN = -0.3V
VIN = 0.3V
1ms/DIV
50mV/DIV
ISL21080
FN6934 Rev.7.00 Page 12 of 23
Sep 28, 2018
FIGURE 20. LINE TRANSIENT RESPONSE FIGURE 21. LOAD REGULATION OVER-TEMPERATURE
FIGURE 22. LOAD TRANSIENT RESPONSE FIGURE 23. LOAD TRANSIENT RESPONSE
FIGURE 24. DROPOUT FIGURE 25. TURN-ON TIME
Typical Performance Characteristics Curves VOUT = 1.5V VIN = 3.0V, IOUT = 0mA, TA
= +25°C unless otherwise specified. (Continued)
VIN = 0.3V
VIN = -0.3V
CL= 0pF
1ms/DIV
50mV/DIV
-500
-300
-100
100
300
500
700
900
-7 -6 -5 -4 -3 -2 -1
SINKING OUTPUT CURRENT SOURCING
VOUT (µV)
01234567
+85°C
-40°C
+25°C
0
IL= 50A
IL= -50A
100mV/DIV
1ms/DIV
1.38
1.40
1.42
1.44
1.46
1.48
1.50
1.52
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
VOUT (V)
7mA LOAD
NO LOAD
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
TIME (ms)
VOLTAGE (V)
VIN
UNIT 1
UNIT 3
UNIT 2
ISL21080
FN6934 Rev.7.00 Page 13 of 23
Sep 28, 2018
FIGURE 26. ZOUT vs FREQUENCY, IOUT = 2mA FIGURE 27. PSRR vs FREQUENCY
Typical Performance Characteristics Curves VOUT = 1.5V VIN = 3.0V, IOUT = 0mA, TA
= +25°C unless otherwise specified. (Continued)
0
20
40
60
80
100
120
140
160
180
200
10 100 1k 10k 100k
1M
Z
OUT
(Ω)
FREQUENCY (Hz)
100nF
10nF
NO LOAD
1nF
-70
-60
-50
-40
-30
-20
-10
0
10 100 1k 10k 100k
1M
PSRR (dB)
FREQUENCY (Hz)
10nF
100nF
NO LOAD
1nF
Typical Performance Characteristics Curves TA = +25°C unless otherwise specified.
FIGURE 28. DROPOUT, ISL21080-10 FIGURE 29. DROPOUT, ISL21080-12
FIGURE 30. DROPOUT, ISL21080-25 FIGURE 31. DROPOUT, ISL21080-30
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
VOUT (V)
VIN (V)
NO LOAD 7mA
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9
VOUT (V)
VIN (V)
NO LOAD 7mA
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
2.5 2.7 2.9 3.1 3.3 3.5
VOUT (V)
VIN (V)
NO LOAD 7mA
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.0 3.2 3.4 3.6 3.8 4.0
VOUT (V)
VIN (V)
NO LOAD 7mA
ISL21080
FN6934 Rev.7.00 Page 14 of 23
Sep 28, 2018
FIGURE 32. DROPOUT, ISL21080-33 FIGURE 33. DROPOUT, ISL21080-41
FIGURE 34. DROPOUT, ISL21080-50
High Current Application
FIGURE 35. DIFFERENT VIN AT ROOM TEMPERATURE FIGURE 36. DIFFERENT VIN AT HIGH TEMPERATURE (+85°C)
Typical Performance Characteristics Curves TA = +25°C unless otherwise specified. (Continued)
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.3 3.5 3.7 3.9 4.1 4.3 4.5
VOUT (V)
VIN (V)
NO LOAD 7mA
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.1 4.3 4.5 4.7 4.9 5.1
VOUT (V)
VIN (V)
NO LOAD 7mA
4.7
4.8
4.9
5.0
5.1
5.2
5.3
5.0 5.2 5.4 5.6 5.8 6.0
VOUT (V)
VIN (V)
NO LOAD 7mA
1.492
1.494
1.496
1.498
1.500
1.502
0 5 10 15 20 25 30
ILOAD (mA)
VREF (V)
35
VIN = 5V
VIN = 3.3V
VIN = 3.5V
1.492
1.494
1.496
1.498
1.500
1.502
0 5 10 15 20 25 30
ILOAD (mA)
VREF (V)
VIN = 5V
VIN = 3.5V
VIN = 3.3V
35
ISL21080
FN6934 Rev.7.00 Page 15 of 23
Sep 28, 2018
Applications Information
FGA Technology
The ISL21080 series of voltage references use floating gate
technology to create references with very low drift and supply
current. Essentially, the charge stored on a floating gate cell is
set precisely in manufacturing. The reference voltage output
itself is a buffered version of the floating gate voltage. The
resulting reference device has excellent characteristics which are
unique in the industry: very low temperature drift, high initial
accuracy, and almost zero supply current. The reference voltage
itself is not limited by voltage bandgaps or Zener settings, so a
wide range of reference voltages can be programmed (standard
voltage settings are provided, but customer-specific voltages are
available).
The process used for these reference devices is a floating gate
CMOS process, and the amplifier circuitry uses CMOS transistors
for amplifier and output transistor circuitry. While providing
excellent accuracy, there are limitations in output noise level and
load regulation due to the MOS device characteristics. These
limitations are addressed with circuit techniques discussed in
other sections.
Board Assembly Considerations
FGA references provide high accuracy and low temperature drift
but some PCB assembly precautions are necessary. Normal
Output voltage shifts of 100µV to 1mV can be expected with
Pb-free reflow profiles or wave solder on multi-layer FR4 PC
boards. Avoid excessive heat or extended exposure to high reflow
or wave solder temperatures. This may reduce device initial
accuracy.
Post-assembly X-ray inspection may also lead to permanent
changes in device output voltage and should be minimized or
avoided. If X-ray inspection is required, it is advisable to monitor
the reference output voltage to verify excessive shift has not
occurred. If large amounts of shift are observed, it is best to add an
X-ray shield consisting of thin zinc (300µm) sheeting to allow clear
imaging, yet block X-ray energy that affects the FGA reference.
Special Applications Considerations
In addition to post-assembly examination, other X-ray sources
may affect the FGA reference long term accuracy. Airport
screening machines contain X-rays and has a cumulative effect
on the voltage reference output accuracy. Carry-on luggage
screening uses low level X-rays and is not a major source of
output voltage shift; however, if a product is expected to pass
through that type of screening over 100 times, it may need to
consider shielding with copper or aluminum. Checked luggage
X-rays are higher intensity and can cause output voltage shift in
much fewer passes, thus devices expected to go through those
machines should definitely consider shielding. Note that just two
layers of 1/2 ounce copper planes reduce the received dose by
over 90%. The leadframe for the device which is on the bottom
also provides similar shielding.
If a device is expected to pass through luggage X-ray machines
numerous times, it is advised to mount a 2-layer (minimum) PCB
on the top, and along with a ground plane underneath will
effectively shield it from 50 to 100 passes through the machine.
Because these machines vary in X-ray dose delivered, it is
difficult to produce an accurate maximum pass
recommendation.
Nanopower Operation
Reference devices achieve their highest accuracy when powered
up continuously, and after initial stabilization has taken place.
This drift can be eliminated by leaving the power on continuously.
The ISL21080 is the first high precision voltage reference with
ultra low power consumption that makes it possible to leave
power on continuously in battery operated circuits. The ISL21080
consumes extremely low supply current due to the proprietary
FGA technology. Supply current at room temperature is typically
350nA, which is 1 to 2 orders of magnitude lower than
competitive devices. Application circuits using battery power
benefit greatly from having an accurate, stable reference, which
essentially presents no load to the battery.
In particular, battery powered data converter circuits that would
normally require the entire circuit to be disabled when not in use
can remain powered up between conversions as shown in
Figure 37. Data acquisition circuits providing 12 bits to 24 bits of
accuracy can operate with the reference device continuously
biased with no power penalty, providing the highest accuracy and
lowest possible long term drift.
Other reference devices consuming higher supply currents need
to be disabled in between conversions to conserve battery
capacity. Absolute accuracy suffers as the device is biased and
requires time to settle to its final value, or, may not actually settle
to a final value as power on time may be short. Table 1 shows an
example of battery life in years for ISL21080 in various power on
conditions with 1.5µA maximum current consumption.
TABLE 1. EXAMPLE OF BATTERY LIFE IN YEARS FOR ISL21080 IN
VARIOUS POWER ON CONDITIONS WITH 1.5µA MAX
CURRENT
BATTERY RATING
(mAH) CONTINUOUS
50% DUTY
CYCLE
10% DUTY
CYCLE
40 3 6 30*
225 16.3* 32.6* 163*
NOTE: *Typical Li-ion battery has a shelf life of up to 10 years.
VIN = +3.0V
0.001µF TO 0.01µF
SERIAL
BUS
VIN VOUT
GND
ISL21080
REF IN
ENABLE
SCK
SDAT
A/D CONVERTER
12 TO 24-BIT
0.01µF
10µF
FIGURE 37. REFERENCE INPUT FOR ADC CONVERTER
ISL21080
FN6934 Rev.7.00 Page 16 of 23
Sep 28, 2018
ISL21080 Used as a Low Cost Precision
Current Source
Using an N-JET and an ISL21080 Nanopower voltage reference, a
precision, low cost, high impedance current source can be
created. The precision of the current source is largely dependent
on the tempco and accuracy of the reference. The current setting
resistor contributes less than 20% of the error.
Output Impedance vs Load Current
The normal operation of the ISL21080 is to “source current” at a
specific reference voltage. This part is not suitable for
applications resulting in the output having to simultaneously
source and sink load currents, as it is a nano-powered part. This
can occur if the voltage reference is used in a bi-directional filter
resulting in output currents having to both source and sink. In an
event where such currents are applied, at every zero crossing, the
part becomes unstable and generates voltage spikes as shown in
Figure 39 (blue trace). The output impedance due to these
voltage spikes is much larger (Figure 40) than if the voltage
reference is only sourcing (Figure 41) or only sinking (Figure 42).
Notice in Figure 41 and Figure 42, there is a direct correlation
between the output impedance vs load current.
FIGURE 39. OUTPUT VOLTAGE SPIKES CAUSED BY SOURCING AND
SINKING OUTPUT LOAD CURRENTS AT ZERO CROSSING
FIGURE 38. ISL21080 USED AS A LOW COST PRECISION CURRENT
SOURCE
+8V TO 28V
0.01µF
VIN VOUT
10kΩ
RSET
0.1%
10ppm/°C
ISY ~ 0.31µA
IL AT 0.1% ACCURACY
~150.3µA
ISL21080-1.5 ZOUT > 100MΩ
ISET
VOUT
ISET = RSET
IL = ISET + IRSET
VOUT = 1.5V
GND
ISL21080 1.5V
VIN = 3.3V
VOUT 20mV/DIV
500mV/DIV
RS = 50k
40ms/DIV
FIGURE 40. ZOUT VS LOAD (SOURCING AND SINKING) CURRENT, NO
LOAD CAPACITANCE
FIGURE 41. ZOUT VS LOAD (SOURCING) CURRENT, NO LOAD
CAPACITANCE
FIGURE 42. ZOUT VS LOAD (SINKING) CURRENT, NO LOAD
CAPACITANCE
10
100
1000
10000
100000
10 100 1000 10000
Z
OUT
(Ω)
I
LOAD
(μA)
F = 10Hz
F = 60Hz
F = 100Hz
F = 1000Hz
0.1
1
10
100
1000
10 100 1000
10000
Z
OUT
(Ω)
I
LOAD
(μA)
F = 10Hz
F = 60Hz
F = 100Hz
F = 1000Hz
0.1
1
10
100
1000
10000
10 100 1000
10000
ZOUT (Ω)
ILOAD (μA)
F = 10Hz
F = 60Hz
F = 100Hz
F = 1000Hz
ISL21080
FN6934 Rev.7.00 Page 17 of 23
Sep 28, 2018
Board Mounting Considerations
For applications requiring the highest accuracy, board mounting
location should be reviewed. Placing the device in areas subject to
slight twisting can reduce the accuracy of the reference voltage due
to die stresses. It is normally best to place the device near the edge
of a board, or the shortest side, as the axis of bending is most
limited at that location. Obviously, mounting the device on flexprint
or extremely thin PC material will likewise cause loss of reference
accuracy.
Noise Performance and Reduction
The output noise voltage in a 0.1Hz to 10Hz bandwidth is
typically 30µVP-P. Noise in the 10kHz to 1MHz bandwidth is
approximately 400µVP-P with no capacitance on the output, as
shown in Figure 43. These noise measurements are made with a
2 decade bandpass filter made of a 1-pole high-pass filter with a
corner frequency at 1/10 of the center frequency and 1-pole
low-pass filter with a corner frequency at 10 times the center
frequency. Figure 43 also shows the noise in the 10kHz to 1MHz
band can be reduced to about 50µVP-P using a 0.001µF
capacitor on the output. Noise in the 1kHz to 100kHz band can
be further reduced using a 0.1µF capacitor on the output, but
noise in the 1Hz to 100Hz band increases due to instability of the
very low power amplifier with a 0.1µF capacitance load. For load
capacitances above 0.001µF, the noise reduction network shown
in Figure 44 is recommended. This network reduces noise
significantly over the full bandwidth. As shown in Figure 43, noise
is reduced to less than 40µVP-P from 1Hz to 1MHz using this
network with a 0.01µF capacitor and a 2kΩ resistor in series with
a 10µF capacitor.
Turn-On Time
The ISL21080 devices have ultra-low supply current and thus, the
time to bias-up internal circuitry to final values is longer than with
higher power references. Normal turn-on time is typically 4ms.
Because devices can vary in supply current down to >300nA,
turn-on time can last up to about 12ms. Care should be taken in
system design to include this delay before measurements or
conversions are started.
Temperature Coefficient
The limits stated for temperature coefficient (tempco) are governed
by the method of measurement. The overwhelming standard for
specifying the temperature drift of a reference is to measure the
reference voltage at two temperatures, take the total variation,
(VHIGH - VLOW), and divide by the temperature extremes of
measurement (THIGH –T
LOW). The result is divided by the nominal
reference voltage (at T = +25°C) and multiplied by 106 to yield
ppm/°C. This is the “Box” method for specifying temperature
coefficient.
CL = 0
CL = 0.001µF
CL = 0.1µF
CL = 0.01µF AND 10µF + 2kΩ
400
350
300
250
200
150
100
50
0
1 10 100 1k 10k 100k
NOISE VOLTAGE (µVP-P)
FIGURE 43. NOISE REDUCTION
VIN = 3.0V
VIN
VO
GND
ISL21080
0.01µF
10µF
2kΩ
0.1µF
10µF
FIGURE 44. NOISE REDUCTION NETWORK
ISL21080
FN6934 Rev.7.00 Page 18 of 23
Sep 28, 2018
Typical Application Circuits
FIGURE 45. PRECISION 2.5V 50mA REFERENCE
FIGURE 46. 2.5V FULL SCALE LOW-DRIFT 10-BIT ADJUSTABLE VOLTAGE SOURCE
FIGURE 47. KELVIN SENSED LOAD
VIN = 3.0V
2N2905
2.5V/50mA
0.001µF
VIN
VOUT
GND
ISL21080
R = 200Ω
VIN
VOUT
GND
2.7V TO 5.5V
0.1µF
0.001µF
VOUT
+
VCC RH
RL
X9119
VSS
SDA
SCL
2-WIRE BUS VOUT
(BUFFERED)
10µF
ISL21080
0.1µF
VIN
VOUT
GND
ISL21080
VOUT SENSE
LOAD
+
10µF
2.7V TO 5.5V
ISL21080
FN6934 Rev.7.00 Page 19 of 23
Sep 28, 2018
Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted.
Please visit our website to make sure you have the latest revision.
DATE REVISION CHANGE
Sep 28, 2018 FN6934.7 Added evaluation board part numbers to Ordering Information table.
Updated Figure 26, “ZOUT vs FREQUENCY, IOUT = 2mA,” on page 13 (the lower frequency responses were
changed for Output impedance with Iout = 2mA).
Updated Figure 27 (minor grid lines were added).
Added “Output Impedance vs Load Current” on page 16.
Mar 26, 2018 FN6934.6 Updated Related Literature section.
Updated Ordering Information table by adding -T7A part, tape and reel quantity column, and updating package
drawing number.
Updated Note 5 by fixing the induced error caused from importing new formatting. Changed 70mA to 70µA.
Removed About Intersil section.
Replaced POD P3.064 with POD P3.064A.
Jun 23, 2014 FN6934.5 Converted to New Template
Updated POD with following changes:
In Detail A, changed lead width dimension from 0.13+/-0.05 to 0.085-0.19
Changed dimension of foot of lead from 0.31+/-0.10 to 0.38+/-0.10
In Land Pattern, added 0.4 Rad Typ dimension
In Side View, changed height of package from 0.91+/-0.03 to 0.95+/-0.07
May, 12, 2010 FN6934.4 Changed Theta JA in the Thermal Information” on page 3 from 170 to 275. Added Theta JC and applicable note.
ISL21080
FN6934 Rev.7.00 Page 20 of 23
Sep 28, 2018
Apr 29, 2010 FN6934.3 Incorrect Thermal information, needs to be re-evaluated and added at a later date when the final data is
available. Removed Theta JC and applicable note from Thermal Information” on page 3.
Apr 14, 2010 Corrected y axis label on Figure 9 from “VOUT (V)” to “VOUT (µV)”
Apr 6, 2010 Source/sink for 0.9V option changed from 7mA to 10mA
Line regulation condition for 0.9V changed from 2.7V to 2V
Line regulation typical for 0.9V option changed from 10 to 30µV/V
TA in Thermal Hysterisis conditions of 0.9V option changed from 165°C to 125°C
Moved “Board Assembly Considerations” and “Special Applications Considerations” to page 15. Deleted
“Handling and Board Mounting” section since Board Assembly Considerations” on page 15 contains same
discussion.
Added “Special Note: Post-assembly X-ray inspection may lead to permanent changes in device output voltage
and should be minimized or avoided.” to “ISL21080” on page 1
Figures 2 and 3 revised to show line regulation and Iin down to 2V.
Figures 4 and 5 revised to show Vin down to 2V.
Added “Initial accuracy can change 10mV or more under extreme radiation.” to Note 9 on page 8.
Apr 1, 2010 1. page 3: Change Vin Min from 2.7 to 2.0
2. page 3: Change Iin Typ from 0.31 to 0.35
3. page 3: Change Line Reg Typ from 80 to 10
4. page 3: Change Load Reg Condition from 7mA to 10mA and -7mA to -10mA
5. page 3: Change Load Reg Typ for Source from 25 to 6 and Sink from 50 to 23.
6. page 3: Change Isc Typ from 50 to 30
7. page 3: Change tR from 4 to 1
8. Change Ripple Rejection typ for all options from -30 to -40
9. page 3: Change eN typ from 30 to 40V
10. page 3: Change VN typ from 50 to 10V
11. page 3: Change Noise Density typ from 1.1 to 2.2
12. page 3: Change Long Term Stability from 50 to 60
13. Added Figure 2 to 13 on page 9 to page 10 for 0.9V curves.
14. Added Figure 28 to 34 on page 13 to page 14 for other options Dropout curve.
15. page 1: Change Input Voltage Range for 0.9V option from TBD to 2V to 5.5V
16. Added latch up to Absolute Maximum Ratings” on page 3
17. Added Junction Temperature to Thermal Information” on page 3
18. Added JEDEC standards used at the time of testing for ESD Ratings” on page 3
19. HBM in Absolute Maximum Ratings” on page 3 changed from 5.5kV to 5kV
20. Added Theta JC and applicable note.
Mar 25, 2010 Throughout- Converted to new format. Changes made as follows:
Moved “Pin Configuration” and “Pin Descriptions” to page 2
Added “Related Literature” to page 1
Added key selling feature graphic Figure 1 to page 1
Added "Boldface limits apply..." note to common conditions of Electrical Specifications tables on page 3 through
page 8. Bolded applicable specs. Added Note 13 to MIN MAX columns of all Electrical Specifications tables.
Added ““Environmental Operating Conditions” to page 3 and added Note 5
Added “The process used for these reference devices is a floating gate CMOS process, and the amplifier circuitry
uses CMOS transistors for amplifier and output transistor circuitry. While providing excellent accuracy, there are
limitations in output noise level and load regulation due to the MOS device characteristics. These limitations are
addressed with circuit techniques discussed in other sections.” on page 15
Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted.
Please visit our website to make sure you have the latest revision. (Continued)
DATE REVISION CHANGE
ISL21080
FN6934 Rev.7.00 Page 21 of 23
Sep 28, 2018
Oct 14, 2009 FN6934.2 1. Removed “Coming Soon” on page 1 and 2 for -10, -20, -41, and -50 options.
2. Page 1. Moved “ISL21080-505.5V to 8.0V" from bullet to sub-bullet.
3. Update package outline drawing P3.064 to most recent revision. Updates to package were to add land
pattern and move dimensions from table onto drawing (no change to package dimensions)
Sep 04, 2009 FN6934.1 Converted to new Intersil template. Added Revision History and Products Information. Updated Ordering
Information to match Intrepid, numbered all notes and added Moisture
Sensitivity Note with links. Moved Pin Descriptions to page 1 to follow pinout
Changed in Features Section
From: Reference Output Voltage1.25V, 1.5V, 2.500V, 3.300V
To: Reference Output Voltage 0.900V, 1.024V, 1.250V, 1.500V, 2.048V, 2.500V, 3.000V,
3.300V, 4.096V, 5.000V
From: Initial Accuracy: 1.5V±0.5%
To: Initial Accuracy:
ISL21080-09 and -10±0.7%
ISL21080-12 ±0.6%
ISL21080-15±0.5%
ISL21080-20 and -25±0.3%
ISL21080-30, -33, -41, and -50±0.2%
FROM: Input Voltage Range
ISL21080-12 (Coming Soon)2.7V to 5.5V
ISL21080-152.7V to 5.5V
ISL21080-25 (Coming Soon)2.7V to 5.5V
ISL21080-33 (Coming Soon)3.5V to 5.5V
TO: Input Voltage Range:
ISL21080-09, -10, -12, -15, -20, and -252.7V to 5.5V
ISL21080-09, -10, and 20 (Coming Soon)
ISL21080-303.2V to 5.5V
ISL21080-333.5V to 5.5V
ISL21080-41 (Coming Soon)4.5V to 8.0V
Added: ISL21080-50 (Coming Soon)5.5V to 8.0V Output Voltage Noise
30µVP-P (0.1Hz to 10Hz)
Updated Electrical Spec Tables by Tables with Voltage References 9, 10, 12, 20, 25, 30, 33
and 41.
Added to Abs Max Ratings:
VIN to GND (ISL21080-41 and 50 only-0.5V to +10V
VOUT to GND (10s)
(ISL21080-41 and 50 only-0.5V to +5.1V
Changed Tja in Thermal information from “202.70” to 170 to match ASYD in Intrepid
Added Note:
Post-assembly X-ray inspection may also lead to permanent changes in device output voltage and should be
minimized or avoided. Most inspection equipment will not affect the FGA reference voltage, but if X-ray
inspection is required, it is advisable to monitor the reference output voltage to verify excessive shift has not
occurred.
Added Special Applications Considerations Section on page 12.
Jul 28, 2009 FN6934.0 Initial Release.
Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted.
Please visit our website to make sure you have the latest revision. (Continued)
DATE REVISION CHANGE
ISL21080
FN6934 Rev.7.00 Page 22 of 23
Sep 28, 2018
Package Outline Drawing
P3.064A
3 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE (SOT23-3)
Rev 0, 7/14
Reference JEDEC TO-236.
Footlength is measured at reference to gauge plane.
Dimension does not include interlead flash or protrusions.
Dimensioning and tolerancing conform to ASME Y14.5M-1994.
3.
5.
4.
2.
Dimensions are in millimeters.1.
NOTES:
DETAIL "A"
SIDE VIEW
TYPICAL RECOMMENDED LAND PATTERN
TOP VIEW
0.20 M C
L
C
1.30 ±0.10
C
L
2.37 ±0.27
2.92 ±0.12
10° TYP
(2 plcs)
0.013(MIN)
0.100(MAX)
SEATING PLANE
1.00 ±0.12
0.91 ±0.03
SEATING PLANE
GAUGE PLANE
0.31 ±0.10
DETAIL "A"
0.435 ±0.065
0 to 8°
(2.15)
(1.25)
(0.60)
(0.95 typ.)
0.13 ±0.05
Dimensions in ( ) for Reference Only.
Interlead flash or protrusions shall not exceed 0.25mm per side.
4
4
0.950
C
0.10 C5
(0.4 RAD typ)
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