TSH512 Datasheet by STMicroelectronics

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mpliliers with ALC n battery power y for mono operation Appficafions Infrared hi-li stereo transmitters Infrared headsets Stereo sub-carriers lor video transmitters Voice-operated wireless webcams FM IF transmit systems Descfipfion The TSH512 is a 0.4- to 11-MHZ dual FM transmitter. Access pins to each section give high versatility and allow lor several dillerent applications: stereo headphone, multimedia headset, audio sub-carrier generator. The TSH512 integrates in a single chip low-noise audio preampliliers With ALC (automatic level control), frequency-modulated oscillators, and linear output buflers to drive the external transistors. The sinusoidal carriers facilitate the filtering and allow high performance audio transmission. The VOX (voice operated transmit) circuitry disables the output buffer when there is no audio signal to save battery power. For MONO applications, the STANDBY pin enables one transmitter only, reducing the supply current. Q mmnnmnnmmnm HHHMHHMHHMH Wit TSH512 J‘ MEX? HUUUHEEUHUM mmummuummum The TSH512 lorms a chipset With the dual receiver TSH511. May 2009 Doc ID 8120 Rev 7
May 2009 Doc ID 8120 Rev 7 1/31
31
TSH512
Hi-fi stereo/mono infrared transmitter
and stereo sub-carrier generator
Features
Supply voltage: 2.3 to 5.5 V
Carrier frequency range: 0.4 to 11 MHz
High versatility: I/O pins for each section
Two FM transmitters for stereo
Sinusoidal carriers for high spectral purity
Micro- or line-level preamplifiers with ALC
VOX function to save on battery power
Transmitter TX2 standby for mono operation
Applications
Infrared hi-fi stereo transmitters
Infrared headsets
Stereo sub-carriers for video transmitters
Voice-operated wireless webcams
FM IF transmit systems
Description
The TSH512 is a 0.4- to 11-MHz dual FM
transmitter. Access pins to each section give high
versatility and allow for several different
applications: stereo headphone, multimedia
headset, audio sub-carrier generator.
The TSH512 integrates in a single chip low-noise
audio preamplifiers with ALC (automatic level
control), frequency-modulated oscillators, and
linear output buffers to drive the external
transistors. The sinusoidal carriers facilitate the
filtering and allow high performance audio
transmission.
The VOX (voice operated transmit) circuitry
disables the output buffer when there is no audio
signal to save battery power. For MONO
applications, the STANDBY pin enables one
transmitter only, reducing the supply current.
The TSH512 forms a chipset with the dual
receiver TSH511.
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-+
-
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-
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-
TSH512
Monostable
ALC
ALC
VCO
VCO
Output
buffer
Output
buffer
TX1
TX2
LNA
LNA
VOX
-
+
PEA
PEA
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--+
-
+
-
+
TSH512
Monostable
ALC
ALC
VCO
VCO
Output
buffer
Output
buffer
TX1
TX2
LNA
LNA
VOX
-
+
PEA
PEA
Pin connections (top view)
F
TQFP44
10 x 10 mm
www.st.com
Contents TSH512
2/31 Doc ID 8120 Rev 7
Contents
1 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3
2 Device diagrams and schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Supply section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Audio section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3 RF section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Infrared stereo transmitter application (stereo headphones) . . . . . . . . . . 14
4.2 Sub-carrier generator application: voice-operated wireless camera . . . . 16
4.3 Multimedia application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.1 Headset side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.2 Computer side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1 LNA section: low noise amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2 Electret condenser microphone source . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3 MIC-BIAS section: microphone bias voltage . . . . . . . . . . . . . . . . . . . . . . 20
5.4 ALC section: automatic level control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.5 VOX description: voice operated transmit . . . . . . . . . . . . . . . . . . . . . . . . 21
5.6 PEA section: pre-emphasis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.7 VCO section: voltage-controlled oscillator . . . . . . . . . . . . . . . . . . . . . . . . 25
5.8 Output buffer section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.9 SBY pin: standby for mono operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.1 TQFP44 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
TSH512 Absolute maximum ratings and operating conditions
Doc ID 8120 Rev 7 3/31
1 Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings
Symbol Parameter Value Unit
VCC Supply voltage(1)
1. All voltage values, except differential voltage, are with respect to network ground terminal.
7V
Toper Operating free air temperature range -40 to +85 °C
Tstg Storage temperature -65 to +150 °C
TjMaximum junction temperature 150 °C
Rthjc Thermal resistance junction to case 14 °C/W
Rthja Thermal resistance junction to ambient area 45 °C/W
Latch-up Class(2)
2. Corporate ST Microelectronics procedure number 0018695.
A
ESD sensitive device: handling precautions required
ESD
except pins 20 and
36
HBM: human body model(3)
CDM: charged device model(4)
MM: machine model(5)
3. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a
1.5 kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations
while the other pins are floating.
4. Charged device model: all pins and the package are charged together to the specified voltage and then
discharged directly to the ground through only one pin. This is done for all pins.
5. Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between
two pins of the device with no external series resistor (internal resistor < 5 Ω). This is done for all couples of
connected pin combinations while the other pins are floating.
2
1
0.2
kV
Table 2. Operating conditions
Symbol Parameter Value Unit
VCC Supply voltage 2.3 to 5.5 V
faudio Audio frequency range 20 to 20,000 Hz
fcarrier Carrier frequency range 0.4 to 11 MHz
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Device diagrams and schematics TSH512
4/31 Doc ID 8120 Rev 7
2 Device diagrams and schematics
This section contains a detailed block diagram of the TSH512 (Figure 1), with an
accompanying pin description (Table 3 on page 5), as well as the schematics of a typical
application (Figure 2 on page 6).
Figure 1. Block diagram
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3738394041
424344
1
+
-+
-
+
-
+
-
TSH512
Monostable
ALC
ALC
VCO
VCO
Output
buffer
Output
buffer
TX1
TX2
LNA
LNA
VOX
-
+
PEA
PEA
2
3
4
5
6
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3738394041
424344
1
--+
-
+
-
+
TSH512
Monostable
ALC
ALC
VCO
VCO
Output
buffer
Output
buffer
TX1
TX2
LNA
LNA
VOX
-
+
PEA
PEA
VCO-BIAS2
VCO-OUT2
LNA-INP2
LNA-INN2
LNA-OUT2
ALC-INT2
PEA-INN2
PEA-OUT2
VCC
VCO-A2
VCO-B2
VCO-BIAS2
VCO-OUT2
LNA-INP2
LNA-INN2
LNA-OUT2
ALC-INT2
PEA-INN2
PEA-OUT2
VCC
VCO-A2
VCO-B2
DEC2
MIC-BIAS2
GND
VCC
SBY
VOX-INTS
VOX-SENS
VCC
GND
MIC-BIAS1
DEC1
DEC2
MIC-BIAS2
GND
VCC
SBY
VOX-INTS
VOX-SENS
VCC
GND
MIC-BIAS1
DEC1
GND
BUF-IN2
BUF-OUT2
GND
VOX-TIMER
VOX-INTN
VOX-MUTE
VCC
BUF-OUT1
BUF-IN1
GND
GND
BUF-IN2
BUF-OUT2
GND
VOX-TIMER
VOX-INTN
VOX-MUTE
VCC
BUF-OUT1
BUF-IN1
GND
LNA-INP1
LNA-INN1
LNA-OUT1
ALC-INT1
PEA-INN1
PEA-OUT1
VCO-BIAS1
VCC
VCO-A1
VCO-B1
VCO-OUT1
LNA-INP1
LNA-INN1
LNA-OUT1
ALC-INT1
PEA-INN1
PEA-OUT1
VCO-BIAS1
VCC
VCO-A1
VCO-B1
VCO-OUT1
TSH512 Device diagrams and schematics
Doc ID 8120 Rev 7 5/31
Table 3. Pin descriptions
Pin Pin name Related to Direction(1) Pin description
1 DEC2 TX2 - Decoupling capacitor for internal voltage reference
2 MIC-BIAS2 TX2 O Microphone bias
3 GND - - Ground
4 VCC - - Supply voltage
5 SBY TX1 & TX2 I Standby control (input pin)
6 VOX-INTS TX1 & TX2 - Time constant terminal for audio signal integrator in VOX
7 VOX-SENS TX1 & TX2 - Gain adjustment for VOX input sensitivity
8 VCC - - Supply voltage
9 GND - - Ground
10 MIC-BIAS1 TX1 O Microphone bias
11 DEC1 TX1 - Decoupling capacitor for internal voltage reference
12 LNA-INP1 TX1 I LNA positive input
13 LNA-INN1 TX1 I LNA negative input
14 LNA-OUT1 TX1 O LNA output
15 ALC-INT1 TX1 - Time constant terminal for integrator in ALC
16 PEA-INN1 TX1 I Pre-emphasis amplifier negative input
17 PEA-OUT1 TX1 O Pre-emphasis amplifier output
18 VCO-BIAS1 TX1 O Bias for external VCO components
19 VCC - - Supply voltage
20 VCO-A1 TX1 - Oscillator component connection
21 VCO-B1 TX1 - Oscillator component connection
22 VCO-OUT1 TX1 O VCO output
23 GND - - Ground
24 BUF-IN1 TX1 I Input to the output buffer
25 BUF-OUT1 TX1 O Output of the output buffer
26 VCC - - Supply voltage
27 VOX-MUTE TX1 & TX2 O Mute control (output pin) in VOX
28 VOX-INTN TX1 & TX2 - Time constant terminal for noise integrator in VOX
29 VOX-TIMER TX1 & TX2 - Rise time for timer in VOX
30 GND - - Ground
31 BUF-OUT2 TX2 O Output of the output buffer
32 BUF-IN2 TX2 I Input to the output buffer
33 GND - - Ground
34 VCO-OUT2 TX2 O VCO output
35 VCO-B2 TX2 - Oscillator component connection
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Device diagrams and schematics TSH512
6/31 Doc ID 8120 Rev 7
Figure 2. Typical application schematics for stereo infrared transmitter
36 VCO-A2 TX2 - Oscillator component connection
37 VCC - - Supply voltage
38 VCO-BIAS2 TX2 O Bias for external VCO components
39 PEA-OUT2 TX2 O Pre-emphasis amplifier output
40 PEA-INN2 TX2 I Pre-emphasis amplifier negative input
41 ALC-INT2 TX2 - Time constant terminal for internal peak detector in ALC
42 LNA-OUT2 TX2 O LNA output
43 LNA-INN2 TX2 I LNA negative input
44 LNA-INP2 TX2 I LNA positive input
1. Pin directions: I = input pin, O = output pin, - = pin to connect to supply or decoupling capacitors or external components.
Table 3. Pin descriptions (continued)
Pin Pin name Related to Direction(1) Pin description
TSH512 Electrical characteristics
Doc ID 8120 Rev 7 7/31
3 Electrical characteristics
Table 4. Electrical characteristics for VCC = 2.7 V, Tamb = 25° C, faudio = 1 kHz, fcarrier = 2.8 MHz
(unless otherwise specified) (1)
Symbol Parameter Test conditions Min. Typ. Max. Unit
Overall circuit
ICC_TOT
Current consumption
TX1 and TX2 are on
TX1 on, TX2 on, MIC-BIAS1 and
MIC-BIAS2 not used:
VOX-MUTE=1 output buffers on
VOX-MUTE=0, output buffers off
16
11
18.6
12.8 mA
-40° C < Tamb <+85°C
VOX-MUTE=1 output buffers on
VOX-MUTE=0, output buffers off
19.6
13.8
ICC_SBY
Current consumption with
TX2 in standby: SBY (pin5)
active
TX1 on, TX2 off, MIC-BIAS1 and
MIC-BIAS2 not used:
VOX-MUTE=1,output buffers on
VOX-MUTE=0, output buffers off
10
7
11.5
8mA
-40° C < Tamb <+85°C
VOX-MUTE=1, output buffers on
VOX-MUTE=0, output buffers off
12.1
8.6
LNA sections (for TX1 and TX2)
GBPLNA Gain bandwidth product No external load 7 MHz
RinLNA
Input resistance on positive
input:
(LNA-INP1 pin 12 or
LNA-INP2 pin 44)
30 kΩ
THDLNA Total harmonic distortion GLNA =0dB, Vout
LNA = 700 mVPP 0.01 0.05 %
-40° C < Tamb < +85° C 0.05
En Equivalent input noise
voltage
GLNA =40dB, at f=1kHz
RS=390Ω, Rfeedback =39kΩ6nV/Hz
Automatic level control (ALC) section
GALC Voltage gain 20 dB
VALC_OUT
Regulated output level
(at positive input of the PEA
amplifier)
600 710 800
mVpp
-40° C < Tamb < +85° C 597 803
Pre-emphasis amplifier (PEA) section
GBPPEA
Gain bandwidth product
(PEA-OUT1 pin 17 or
PEA-OUT2 pin 39)
No load 9 MHz
VOpp-PEA Output voltage RL = 22 kΩ550 mVpp
Electrical characteristics TSH512
8/31 Doc ID 8120 Rev 7
Audio LNA+ALC+PEA sections
THDALC
Total harmonic distortion in
linear region on PEA-OUT1
pin17 or PEA-OUT2 pin 39
GLNA = 0 dB, f = 1 kHz
(Vin)ALC < 25 mVrms (-30 dBu)
RL = 22 kΩ tied to GND
0.05 0.15 %
-40° C < Tamb < +85° C 0.25
THDAGC
Total harmonic distortion in
compression region
(Vin)ALC = 36 mVrms (-27 dBu)
(Vin)ALC= 100 mVrms (-18 dBu)
RL = 22 kΩ tied to GND
1.3
3
1.7
4
%
-40° C < Tamb <+85°C
(Vin)ALC = 36 mVrms (-27 dBu)
(Vin)ALC= 100 mVrms (-18 dBu)
2.5
5.3
ΦΜPEA
Phase margin at
PEA-OUT1 pin 17 or
PEA-OUT2 pin 39
RL=22kΩ
LNA and PEA at unity gain
Vin = 40 mV
70 °
Microphone biasing section
VMIC-BIAS
Microphone biasing voltage
(Section 5.3 on page 20)
IMIC-BIAS = 2.5 mA 2.15 2.25 2.35 V
-40° C < Tamb < +85° C 2.14 2.36
ΔVMIC-BIAS
VMIC-BIAS temperature
coefficient
Over temp. range:
[0, 70° C]
[-40, 85° C]
IMIC-BIAS = 2.5 mA
260
460 ppm/°C
IMIC-BIAS MIC-BIAS current capability Over VCC range [2.3 V–5.5 V] 2.5 mA
PSRRMIC-BIAS
Power supply rejection ratio
of MIC-BIAS At 1 kHz and Vripple = 25 mVRMS 50 dB
enMIC-BIAS
Equivalent input noise of
MIC-BIAS
VCC =2.7V
VCC =5.0V
22
42 nV/Hz
Vox operated switch (VOX) section
IVOX-TIMER
Monostable current source
(VOX-TIMER pin 29) VCC = 2.7V 5 μA
VTHVOX-TIMER
Threshold voltage of the
Monostable (time constant) 1.4 V
VMUTE_L
Low level output voltage
(VOX-MUTE pin 27)
RL = 2 kΩ0.2 V
-40° C < Tamb <+85°C 0.2
VMUTE_H
High level output voltage
(VOX-MUTE pin 27)
RL = 2 kΩVCC-0.3
V
-40° C < Tamb <+85°C VCC-
0.32
Table 4. Electrical characteristics for VCC = 2.7 V, Tamb = 25° C, faudio = 1 kHz, fcarrier = 2.8 MHz
(unless otherwise specified) (continued) (1)
Symbol Parameter Test conditions Min. Typ. Max. Unit
n 24 or BUF7|N2
TSH512 Electrical characteristics
Doc ID 8120 Rev 7 9/31
Standby
VSBY_IL
maximum
Maximum low level input
voltage of standby input
(SBY pin 5)
0.1xVCC V
VSBY_IH
minimum
Minimum high level input
voltage of standby input
(SBY pin 5)
0.9xVCC V
VCO section
VVCO-BIAS
VCO-BIAS output voltage
(VCO-BIAS1 pin 18 or
VCO-BIAS2 pin 38)
With no load 1.43 1.47 1.51
VDC
-40° C < Tamb < +85° C 1.38 1.56
IVCO-BIAS
VCO-BIAS output current
capability VVCO-BIAS > 1.38 V 40 μA
δVVCO-BIAS VCO-BIAS voltage drift
2.3 V < VCC < 5.5 V
[0, 70° C] VCC =2.7V
[0, 70° C] VCC =5.0V
[-40, 85° C] VCC =2.7V
[-40, 85° C] VCC =5.0V
8
+265
+356
+265
+356
mV/V
ppm/°C
ppm/°C
ppm/°C
ppm/°C
PNLO Phase noise At 1 kHz, L = 120 μH (Q = 30) and
RVCO not connected -80 dBc
SVRVCO-BIAS
Supply voltage rejection
ratio of VCO-BIAS With no load 43 dB
ZVCO-OUT
VCO output impedance
(VCO-OUT1 pin 22 or
VCO-OUT2 pin 34)
400 Ω
ZLVCO-OUT
minimum Minimum load impedance 1 kΩ
VVCO-OUT VCO output level
L= 12H (Q=30)
VCO output connected to output
buffer input RVCO = 100 kΩ
580 620 660 mVpp
-40° C < Tamb < +85° C 569 671
Output buffer
ZBUF-IN
Input impedance
(BUF-IN1 pin 24 or BUF-IN2
pin 32)
400 kΩ
GOB Linear voltage gain 10 dB
VBUF-OUT
AC
Output AC voltage at 1dB
compression point ZL=2kΩ1.3
Vpp
Output AC voltage
(BUF-OUT1 pin 25 or
BUF-OUT2 pin 31)
ZL=2kΩ VBUF-IN = 0.60 Vpp 1.35 1.5 1.7
-40° C < Tamb < +85° C 1.33 1.72
Table 4. Electrical characteristics for VCC = 2.7 V, Tamb = 25° C, faudio = 1 kHz, fcarrier = 2.8 MHz
(unless otherwise specified) (continued) (1)
Symbol Parameter Test conditions Min. Typ. Max. Unit
Electrical characteristics TSH512
10/31 Doc ID 8120 Rev 7
3.1 Supply section
3.2 Audio section
VBUF-OUT
DC Output DC voltage DC output current = 0.4 mA 1.25 VDC
H2BUF-OUT 2nd harmonic level VBUF-OUT = 1.2 Vpp and ZL=2kΩ-40 dBc
H3BUF-OUT 3rd harmonic level VBUF-OUT =1.2V
pp and ZL=2kΩ-30 dBc
1. Limits over -40° C < Tamb < +85° C range are guaranteed by statistical correlation.
Figure 3. Supply current vs. supply voltage
Table 4. Electrical characteristics for VCC = 2.7 V, Tamb = 25° C, faudio = 1 kHz, fcarrier = 2.8 MHz
(unless otherwise specified) (continued) (1)
Symbol Parameter Test conditions Min. Typ. Max. Unit
0123456
0
2
4
6
8
10
12
14
16
18
TX1
TX1+Buffers
TX1+TX2
TX1+TX2+Buffers
ICC(mA)
VCC(V)
Figure 4. LNA distortion vs. frequency Figure 5. LNA distortion vs. LNA output
voltage
10 100 1000 10000
0.01
0.1
1
VCC = 2.7V
GLNA = 0dB
VOUT-LNA = 700mVpp
THDLNA+N (%)
Frequency (Hz)
0 200 400 600 800 1000 1200 1400 1600
1E-3
0.01
0.1
1
10
100
GLNA = 0dB
VCC = 5.5V
VCC = 2.7V
VCC = 2.3V
THDLNA+N (%)
VOUT-LNA(mVpp)
TSH512 Electrical characteristics
Doc ID 8120 Rev 7 11/31
Figure 6. Supply current vs. temperature Figure 7. LNA distortion vs. frequency
020406080
0
2
4
6
8
10
12
14
16
VCC = 2.7V
TX1+TX2
TX1
TX1+Buffers
TX1+TX2+Buffers
ICC(mA)
TAMBC)
10 100 1000 10000
0.1
1
10
VCC = 2.7V
GLNA = 40dB
VOUT-LNA = 700mVpp
THDLNA+N (%)
Frequency (Hz)
Figure 8. PEA output voltage vs. LNA input
voltage
Figure 9. PEA output voltage vs. temperature
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
RL-PEA = 22KΩ
GLNA = 0dB
GPEA = 0dB
VCC = 5.5V
VCC = 2.7V
VCC = 2.3V
VOUT-PEA(VPP)
VIN-LNA(Vpp)
-40 -20 0 20 40 60 80
0
100
200
300
400
500
600
700
800
RL-PEA=22KΩ
GLNA = 0dB
GPEA = 0dB
VCC = 2.7V
VCC = 5V
VOUT-PEA(VPP)
TAMB(°C)
Figure 10. PEA output voltage vs. resistor
load
Figure 11. MIC-BIAS output voltage vs. supply
voltage
100 1k 10k 100k 1M
200
300
400
500
600
VCC = 2.7V
VOUT-PEA(mVPP)
RL-PEA(
Ω
)
2.02.53.03.54.04.55.05.56.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
IMIC-BIAS = 2.5mA
VMIC-BIAS(V)
VCC(V)
Electrical characteristics TSH512
12/31 Doc ID 8120 Rev 7
Figure 12. MIC-BIAS voltage vs. MC-BIAS
current
Figure 13. LNA+ALC+PEA distortion vs. input
voltage
01234
1.6
1.8
2.0
2.2
2.4
VCC = 2.3V
VMIC-BIAS(V)
IMIC-BIAS(mA)
0.02 0.04 0.06 0.08 0.10
0.01
0.1
1
10
RL-PEA = 22KΩ
GLNA = 0dB
GPEA = 0dB
VCC = 5.5V
VCC = 2.7V
VCC = 2.3V
THDLNA+ALC+PEA+N (%)
VIN(Vpp)
Figure 14. MIC-BIAS output voltage vs.
temperature
Figure 15. MIC-BIAS voltage vs. MIC-BIAS
current
-40-30-20-100 1020304050607080
2.1
2.2
2.3
2.4
VCC = 2.7V
IMIC-BIAS = 2.5mA
VMIC-BIAS(V)
TAMB(°C)
0123
2.20
2.25
2.30
2.35
2.40
VCC=2.7V
VMIC-BIAS(V)
IMIC-BIAS(mA)
TSH512 Electrical characteristics
Doc ID 8120 Rev 7 13/31
3.3 RF section
Figure 16. VCO output voltage vs. RVCO Figure 17. VCO-BIAS voltage vs. VCO-BIAS
current
10k 100k 1M
300
350
400
450
500
550
600
650
700
VCC = 2.7V
L = 120μH (Q=30)
FCARRIER = 2.8MHz
VVCO-OUT(mVPP)
RVCO(
Ω
)
0 1020304050
1.30
1.35
1.40
1.45
VCC = 2.7V
Rfilter = 51Ω
Cfilter = 470nF
VVCO-BIAS(V)
IVCO-BIAS(mA)
Figure 18. VCO and output buffer spectrum Figure 19. VCO-BIAS voltage vs. temperature
Figure 20. VCO and output buffer spectrum
369121518
-30
-20
-10
0
10
20
30
40
50
60
VCC = 2.7V
RVCO = 22kΩ
ZL = 2kΩ
FCARRIER = 2.8MHz
VBUF-OUT(dBmV)
Frequency(MHz)
-40-30-20-10 0 1020304050607080
1.3
1.4
1.5
1.6
VCC = 2.7V
No Load
VVCO-BIAS(V)
TAMB(°C)
2.795
2.796
2.797
2.798
2.799
2.800
2.801
2.802
2.803
2.804
2.805
-30
-20
-10
0
10
20
30
40
50
60
VCC = 2.7V
L = 120μH (Q=30)
RVCO = no connected
ZL = 2kΩ
BW = 200Hz
FCARRIER = 2.8MHz
VBUF-OUT(dBmV)
Frequency(MHz)
4.1 Infrared stereo transmitter application ( In this application, shown in Figure 21, the hi-ii stereo audio by ALC. The carrier oi each transmitter TX1 or TX2 oi the T buflered to drive the LED. Figure 21. Hi-ii stereo headphone block diagram W” TSH512 i—i j I; TSH511 mm M.“ Gigp vnnmninae V“ 1mm Line inputs ’ ’Jv‘ LED m chanmi mm“ 3‘09 1mm @#4|> wit” mum «631% I i_i _ 1'5 WWW 2 3 m 5 5V in 20 mAsiemD The audio signals are transmitted on the left and the right channeis using 2.8 carriers. The VOX activates the TX1 transmitter when the audio signal is pre (Figure 22'). 14/31 Doc ID 8120 Rev 7
Application information TSH512
14/31 Doc ID 8120 Rev 7
4 Application information
This section gives application information for some typical applications.
4.1 Infrared stereo transmitter application (stereo headphones)
In this application, shown in Figure 21, the hi-fi stereo audio is amplified and level regulated
by ALC. The carrier of each transmitter TX1 or TX2 of the TSH512 is modulated in FM and
buffered to drive the LED.
Figure 21. Hi-fi stereo headphone block diagram
The audio signals are transmitted on the left and the right channels using 2.8- and 2.3-MHz
carriers. The VOX activates the TX1 transmitter when the audio signal is present
(Figure 22).
Audio
amp1
Audi o
amp2
SBY1
SBY2
²SQUELCH
LNA
LNA + ALC
LNA + ALC
SBY
buffer1
buffer2
RX2
RX1
Line inputs
Right
channel
Left
channel
Vcc
LED
photodiode
filter
filter
2.3 MHz
2.8 MHz
Vcc: 2.3 to 5.5V
Current < 15 mA
TSH512 TSH511
20 mW / 16 Ω
20 mW / 16 Ω
Power supply:
2.3 to 5.5V
Icc < 20 mA stereo
IR stereo HiFi transmitter Headphone side
HiFi stereo:
2.3 & 2.8 MHz carriers
VOX
TX1
TX2
²SQUELCHSQUELCH
RX2
RX1
LED
filter
20 mW / 16 Ω
20 mW / 16 Ω
:
:
VOX
TX1
TX2
Abn— W; E: WET fiEA %: A) {Vflfl w: #4: *W“ H A? W M rJW ] ”Hi We; “ 7W] (HS 74 . i E: E {E <4?><—h—i:rfw g="" v="">
TSH512 Application information
Doc ID 8120 Rev 7 15/31
Figure 22. Application diagram
DEC2
1
MIC-BIAS2
2
GND
3
VCC
4
SBY
5
VOX-INTS
6
VOX-SENS
7
VCC
8
GND
9
MIC-BIAS1
10
DEC1
11
LNA-INP1
12
LNA-INN1
13
LNA-OUT1
14
ALC-INT1
15
PEA-INN1
16
PEA-OUT1
17
VCO-BIAS1
18
VCC
19
VCO-A1
20
VCO-B1
21
VCO-OUT1
22
GND 23
BUF-IN1 24
BUF-OUT1 25
VCC 26
VOX-MUTE 27
VOX-INTN 28
VOX-TIMER 29
GND 30
BUF-OUT2 31
BUF-IN2 32
GND 33
VCO-OUT2 34
VCO-B2 35
VCO-A2 36
VCC 37
VCO-BIAS2 38
PEA-OUT2 39
PEA-INN2 40
ALC-INT2 41
LNA-OUT2 42
LNA-INN2 43
LNA-INP2 44
LNA
+
-+
-
ALC
PEA
LNA +
-
+
-
ALC
PEA
VOX
+
-
Monostable
IC2
TSH512
R23
3K9
C29
470nF
R24
470k
R32
10K
R31
47
C33
470pF
C42
2nF2
C43
100nF
R36
270K
R35
100K
C35
470nF
C34
470nF
+5V
R26
47K
C36
56pF
C37
56pF
C45
6-60pF
C46
12pF
L2
120uH
R37
47K
+5V
C47
68pF
C38
56pF
C13
220nF
R21
33K
C28
470nF
+5V
C39
470nF
C30
1uF
R12
470K
R4
10K
R3
47
C6
470pF
C5
2nF2
C8
100nF
R7
270K
R8
100K
C7
470nF
C18
470nF
+5V
R14
47K
C19
56pF
C20
56pF
C10
6-60pF
C11
12pF
R9
47K
+5V
C12
390pF
C21
56pF
C151uF
C14
470nF
+5V
C40
22nF
C24
22nF
D4
HSDL4230
D6
HSDL4230
Vcc
1
2
3
J2
JACK3.5ST
C321uF
C17
1uF
+5V
L1
120uH
C26
100uF
Vcc
C44
39pF C9
39pF
R22
1K8
R20
8K2
R10
8K2
R11
1K8
C31
100nF
R25
47
C16
100nF
R13
47
R30
5K6
C41
10uF
R2
5K6
C4
10uF
NC
0 Ohm
VOX
ON
OFF
R15
TX1 = 2.8MHz
TX2 = 2.3MHz
C23
100nF
C27
100nF
C22
10uF
R16
150K
R33
3K
R34
7K5
R6
3K
R5
7K5
D5
HSDL4230
D7
HSDL4230
D8
SMV1212
D3
SMV1212
Q1
STZT2222A
R19
10
R18
47
R17
2K4
R27
2K4
R28
24K
R29
2K7
IC3 TSH81
+5V
+5V
C25
100nF
R15
See Note
1812LS (Coilcraft)
1812LS (Coilcraft)
100mW mini
(1206)
3
2
6
7
8
4
R38
1K2
C48
22pF
Miniature camera Video S . _l_ Subrcarrier StandrBy TSH512 , ‘ LNIuALc bullei? —4>—> 1x2 um ' Mic BIAS “I ‘l voerurE ElectretCandenser E»: Microphone Mic BIAS :i—n— mine” I |_4.> H ’4) I ”W“ 6 or6.5 MHZ Audio Subrcarri er 6 or 6.5 MHZ 4.3 Multimedia application 4.3.1 Headset side The TSH512 is used In mono mode to transmit the signal ol the electret condenser microphone ol the headset. The circuit is supplied by batteries and the VOX function switches off the output stages to save energy. The usual working lrequency is 1.7 MHz for infrared mono operation. 15/31 Doc ID 3120 Rev 7 ‘7!
Application information TSH512
16/31 Doc ID 8120 Rev 7
4.2 Sub-carrier generator application: voice-operated wireless
camera
Thanks to its operating frequency, the TSH512 offers the possibility of generating usual
audio sub-carriers for video applications (Figure 23). The camera can be voice-activated
using the VOX-MUTE output of the TSH512. The TSH512 also provides bias, amplification,
ALC for the electret microphone.
Figure 23. Typical block diagram for audio sub-carrier generator
4.3 Multimedia application
4.3.1 Headset side
The TSH512 is used in mono mode to transmit the signal of the electret condenser
microphone of the headset. The circuit is supplied by batteries and the VOX function
switches off the output stages to save energy. The usual working frequency is 1.7 MHz for
infrared mono operation.
TSH512
LNA + ALC
LNA + ALC
MIC. BIAS
MIC. BIAS
TX2
VOX
SBY
buffer1
buffer2
Vcc
6 or 6.5 MHz
filter
Electret Condenser
Microphone
Miniature camera
FM 2.4 GHz
transmitter
6 or 6.5 MHz
Audio sub-carrier
Video
VOX-MUTE
Stand-By
S
Sub-carrier
Stand-By
TX1
TSH512
LNA + ALC
LNA + ALC
MIC. BIAS
MIC. BIAS
TX2
VOX
SBY
buffer1
buffer2
Vcc
6 or 6.5 MHz
filter
Electret Condenser
Microphone
Miniature camera
FM 2.4 GHz
transmitter
6 or 6.5 MHz
Audio sub-carrier
Video
VOX-MUTE
Stand-By
S
Sub-carrier
Stand-By
TX1
“(WI TSH511 Aumu Vmce hansmmed m 072 PC TSH512 m . ALE we Ems my me Ems mm mm mm am: M 5m“, RX 2 3 a, 2 8 MHz Microphone Tx: 1 7 MHI mm carrier 4.3.2 Computer side In mullimedwa applica‘ions, ‘he TSH512 lransmi‘s the hw-fi slereo lrorn ‘he PC to the headset Computer-side block diagram rsHsn Lsuxupmy: 2.3 m 5.5% u m 17MHz wmmume H m TSH512 : 7t m . ALE A N LED ma . ALE A V ‘7] Doc ID 8120 Rev 7
TSH512 Application information
Doc ID 8120 Rev 7 17/31
Figure 24. Headset-side block diagram
4.3.2 Computer side
In multimedia applications, the TSH512 transmits the hi-fi stereo from the PC to the
headset.
Figure 25. Computer-side block diagram
TSH512
LNA + ALC
LNA + ALC
MIC. BIAS
MIC. BIAS
TX2
TX1
VOX
SBY
buffer1
buffer2
photodiode
Vcc
LED
Vcc
Audi o
amp2
SBY1
SBY2
LNA
2.3 MHz
Band-pass
TSH511
HiFi stereo from the PC:
2 x 20 mW /16 Ω
1.7 MHz
Band-pass
Voice transmitted to the PC
Microphone Tx:
1.7 MHz
carrier
Stereo Rx:
2.3 & 2.8 MHz
filter
1.7 MHz
reject
2.8 MHz
Band-pass
TSH511 & 512 supply:
2.3 to 5.5V, 25 mA
Audi o
amp1
filter
filter filter
RX2
RX1
SQUELCH
1.7 MHz
reject
f ilter
Vcc
-
HiFi
-
Microphone Tx:
1.7 MHz
carrier
Stereo Rx:
2.3 & 2.8 MHz
filter
-pass
:
filter
filter filter
SQUELCH
f ilter
LNA + ALC
LNA + ALC
SBY
buffer1
buffer2
LED
photodiode
TSH511 & 512 supply:
2.3 to 5.5V, 24 mA
TSH512 Audio
amp1
Audio
amp2
SBY1
SBY2
SQUELCHSQUELCH
LNA
RX2
RX1
filter
TSH511
Vcc
1.7 MHz
Band-pass
HiFi stereo Tx:
2.3 & 2.8 MHz
mono Rx:
1.7 MHz
Voice from the headset microphoneHiFi stereo
VOX
TX2
TX1
General description TSH512
18/31 Doc ID 8120 Rev 7
5 General description
The TSH512 is a 0.4- to 11-MHz dual FM analog transmitter. This circuit offers the functions
needed for an advanced infrared STEREO transmitter. The access pins for each section
allow high versatility and therefore a lot of applications: mono infrared transmitter, stereo
transmitter, mono/stereo sub-carrier generator for video transmissions (for example the
popular 2.4 GHz video links). The block diagram for the TSH512 is shown in Figure 1 on
page 4.
Each audio input is amplified with a low noise amplifier (LNA section) allowing connection
to line level sources or directly to a microphone. Built-in MIC BIAS voltage references
provide bias for electret condenser microphones (ECM) with a high power supply rejection
ratio.
Each audio path also includes an automatic level control (ALC) to limit the over-
modulation and the distortion on very high signal amplitudes. The following operational
amplifier (PEA) allows a pre-emphasis transfer function before modulating the varicap
diode.
Built-in voltage references (VCO-BIAS) offer a regulated voltage to bias the varicap diodes.
The voltage controlled oscillator (VCO) is an integrated oscillator giving typically 600 mV
peak-to-peak at 2.8 MHz.
The output buffer section linearly amplifies the FM carrier to provide a sinusoidal output.
This sinusoidal signal reduces the inter-modulation products between the carriers,
especially in two-way or in multi-carrier systems (see Section 4: Application information on
page 14).
The voice operated transmit function (VOX) automatically detects when an audio signal
appears over the background noise.
The standby of the second transmitter reduces consumption in mono operation.
5.1 LNA section: low noise amplifier
For each transmitter, the audio source is connected to the LNA. The LNA stage is a low
noise operational amplifier typically usable with a gain from 0 to 40 dB.
Tm E23 2 me: n 220 <21. m="">
TSH512 General description
Doc ID 8120 Rev 7 19/31
Figure 26. LNA schematics
The LNA gain is given by:
GLNA (dB) = 20.Log(1+RLNA2/RLNA1)
The high-pass cut-off frequency is:
fHPF = 1/(2.π.RLNA1.CLNA1)
The lowpass filter cut-off frequency is:
fLPF = 1/(2.π.RLNA2.CLNA2)
If you connect an external circuit to the LNA output, the impedance of this external circuit
should be higher than 10 mΩ and the capacitance lower than 50 pF in order to keep a good
stability.
Note: The capacitor C must be connected directly to input pin 12.
5.2 Electret condenser microphone source
When an electret condenser microphone (ECM) is used, a high gain LNA is recommended,
but low frequencies have to be attenuated. The ECM must be biased with a stable and clean
reference voltage. The TSH512 provides the LNA and the MIC-BIAS sections to perform this
function (see Section 5.3. MIC-BIAS section: microphone bias voltage).
Tm an? E 5.5 _ 7:45 53 MICROPHONE \
General description TSH512
20/31 Doc ID 8120 Rev 7
Figure 27. Electret condenser microphone source
The capacitor C in series with the microphone stops the DC coming from MIC-BIAS.
The resistor R provides the DC from MIC-BIAS to supply the ECM.
Thanks to the automatic level control (ALC), the great variations of amplitude will not over-
modulate the transmitter (refer to the Section 5.4: ALC section: automatic level control).
The self-adaptive VOX (voice operated transmit) offers automatic transmitting with a good
discrimination of the background noise (see Section 5.5: VOX description: voice operated
transmit on page 21).
5.3 MIC-BIAS section: microphone bias voltage
The MIC-BIAS bias voltages are dedicated to the bias of electret condenser microphones.
These bias voltages on pin 10 for TX1 and pin 2 for TX2 exhibit a low voltage noise density
of 22 nV/Hz). This allows more than 55 dB S/N considering a bandwidth of 7 kHz
(Figure 27).
The MIC-BIAS voltage is related to VCC as follows (with I MIC-BIAS= 2.5 mA):
VMIC-BIAS = 0.844.Vcc-0.140 (volts)
Moreover, the supply rejection ratio is guaranteed to be better than 50 dB without any
decoupling capacitor. To address biasing of most of the microphones, the current drive
capability is 2.5 mA. The MIC-BIAS voltage depends linearly on the supply voltage VCC
(refer to Figure 11 on page 11).
52:. ><>
TSH512 General description
Doc ID 8120 Rev 7 21/31
5.4 ALC section: automatic level control
Both transmitters of the TSH512 include an automatic level control (ALC). When the level of
the audio signal is too high, the ALC compresses the signal in order to avoid over-
modulation of the FM VCO. In this way, the ALC reduces the distortion and maintains a
reduced transmit spectrum with very high amplitude signals.
Figure 28. Automatic level control schematics
The ALC features a 20 dB gain and an output signal regulated to 700 mVpp in compression.
The attack time is the response time of the ALC to go from the linear amplification to the
compression region. The attack time mainly depends on the capacitor value of CALC.
A typical value of CALC is 1 μF with music as the audio signal (refer to Figure 22 on
page 15).
The decay time is the response time the ALC requires to recover to full gain amplifying
mode after being in compression mode. The decay time depends mainly on the RALC
resistor value. A typical value of RALC is 470 kΩ, with music as audio signal (Figure 22).
5.5 VOX description: voice operated transmit
The voice operated transmit (VOX) section reduces consumption when there is no audio
signal to transmit. When the VOX detects that no audio signal is present, it mutes the output
buffers of TX1 and TX2 and provides the logic signal VOX-MUTE to switch-off the external
LED drivers if needed.
The audio signal of TX1 is amplified with a gain dependent on the values of Rsens and Csens.
Rsens and Csens are connected to pin 7. The high-pass filtering has the following cut-off
frequency:
fHPF
1
2πRsens Csens
()
--------------------------------------------------=
TSH512 VOX Sensitivl D \ x ‘y \1 m Cscni km: E Vcc SZ Pulse wmm Adjusl Vallcnp MONO SZ STABLE cnmpamlm
General description TSH512
22/31 Doc ID 8120 Rev 7
Figure 29. VOX delay and sensitivity schematics
On pin 6, Rpeak and Cpeak integrate the rectified audio signal with a short time constant. This
filtered signal follows the audio amplitude.
Figure 30. VOX integrator and monostable schematics
The self-adaptive VOX threshold is necessary because the ambient background noise
variation is slow compared to the voice or the music. On pin 28, RCOMP and CCOMP
integrate the amplitude to follow the background amplitude. Therefore, the comparator
switches when an audio signal appears over the background noise. Referring to Figure 2,
CCOMP will be typically a 100 nF capacitor and RCOMP will be determined depending on the
audio signal.
As soon as an audio signal is detected, the output of the monostable switches to "high" state
and enables both output buffers. The monostable output is pin 27 and is called VOX-MUTE.
ev
TSH512 General description
Doc ID 8120 Rev 7 23/31
The monostable holds the TSH512 in transmit mode during a delay fixed by the value of
CTRIG connected to pin 29.
Note that the VOX function is activated when the audio signal enters the first transmitter
TX1.
When the application needs a permanent transmission, it is possible to inhibit the VOX
function, by removing the Ctrig capacitor and connecting pin 29 to ground.
As soon as the TSH512 is powered-on, the internal reset circuitry sets the VOX-MUTE to
high state to enable transmission. The transmission remains during the monostable timing
and continues if an audio signal triggers the monostable.
Figure 31. VOX state at power-on
VOXDELAY
1.4V
5μA
------------
⎝⎠
⎛⎞
Ctrig
=
time
VOX -MUTE
POWER SUPPLY
on
off
VOX Delay
(Ctrig)
0
1
high state if retriggered by audio
min 53:5, A m m A R Sam :55 6 m WN mwm‘mzwmai 3355? _ _ E _ _ W |/>\(I
General description TSH512
24/31 Doc ID 8120 Rev 7
5.6 PEA section: pre-emphasis
The amplitude-regulated audio coming from the ALC feeds the positive input of the
operational amplifier called PEA (pre-emphasis). The pre-emphasis consists in a high-pass
filter in order to compensate the behavior of the FM transmission.
Figure 32. Pre-emphasis schematics
RPEA1 and CPEA1 set the time constant of the pre-emphasis as:
τ = RPEA1. CPEA1
50 μs or 75 μs time constants are generally used.
Choosing the gain of the PEA stage also allows one to set the right modulation level to the
varicap diode. The gain in the passband is:
GPEA = 1+ (RPEA2/RPEA1)
PEA A? VCO TXl 9“ Varlcap BIAS gm ; ; 7’ binsl __ Varlcap —— 1% a
TSH512 General description
Doc ID 8120 Rev 7 25/31
5.7 VCO section: voltage-controlled oscillator
Each TSH512 transmitter has its own oscillator to generate the carrier. The audio signal is
applied to the varicap diode to perform the frequency modulation. Thanks to the VCO-BIAS
voltage reference, the DC bias of the varicap is stabilized. The high power supply rejection
ratio (PSRR) of the VCO-BIAS ensures good immunity with the noise of the power supply.
Figure 33. VCO schematics
The generated frequency can be set from 400 kHz to 11 MHz by external components.
Refer to Ta b l e 1 for the usual frequencies in infrared audio.
The working frequency is:
where Ct is the total capacity of CL, Cp, Cs and Cv:
Ct = 1/(1/Cc+1/CL) with Cc = Cp+1/(1/Cv+1/Cs)
It is possible to use varicap diodes SMV1212 (Alpha Ind.) or ZC833 (Zetex).
The output level of the VCO can be reduced by adding the resistor RVCO between pin 19
and pin 20 or between pin 36 and pin 37 for TX1 and TX2 respectively.
Table 5. Usual infrared frequencies
IR frequency in MHz Applications
1.6 AM mono
1.7 FM mono
2.3 FM right channel
2.8 FM left channel or mono
fVCO
1
2πLC
t
()
---------------------------------=
General description TSH512
26/31 Doc ID 8120 Rev 7
5.8 Output buffer section
The output buffers can deliver a sinusoidal signal with a 1.5 Vpp amplitude in a 1 kΩ load.
This impedance is compatible with popular biasing circuitry of external transistor drivers of
IR LEDs.
The VOX-MUTE logic signal can be used to control the external LED drivers. When the
audio is not present on the TX1 input, VOX-MUTE is in Low state, the TSH512’s internal
buffers are muted, and the external drivers can be switched off by controlling their bias.
5.9 SBY pin: standby for mono operation
A high state on the Standby pin (SBY) sets the second transmitter TX2 to power-down. The
SBY pin is typically used when the TSH512 is used as a mono transmitter (that is, infrared
microphone transmitter).
TSH512 Package information
Doc ID 8120 Rev 7 27/31
6 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Package information TSH512
28/31 Doc ID 8120 Rev 7
6.1 TQFP44 package information
Figure 34. TQFP44 package mechanical drawing
Table 6. TQFP44 package mechanical data
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 1.6 0.063
A1 0.05 0.15 0.002 0.006
A2 1.35 1.40 1.45 0.053 0.055 0.057
b 0.30 0.37 0.45 0.012 0.015 0.018
c 0.09 0.20 0.004 0.008
D 11.80 12 12.20 0.465 0.472 0.480
D1 9.80 10.00 10.20 0.386 0.394 0.402
D3 8.00 0.315
E 11.80 12.00 12.20 0.465 0.472 0.480
E1 9.80 10.00 10.20 0.386 0.394 0.402
E3 8.00 0.315
e 0.80 0.031
L 0.45 0.60 0.75 0.018 0.024 0.030
L1 1.00 0.039
K 0°3.5°7° 0°3.5°7°
ccc 0.10 0.004
TSH512 Ordering information
Doc ID 8120 Rev 7 29/31
7 Ordering information
Table 7. Order codes
Part number Temperature
range Package Packing Marking
TSH512CF
-40° C to +85°C
TQFP44 Tra y TSH512C
TSH512CFT Tape & reel
TSH512CYFT(1)
1. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening
according to AEC Q001 & Q 002 or equivalent.
TQFP44
(automotive grade level) Tape & reel TSH512CYF
Revision history TSH512
30/31 Doc ID 8120 Rev 7
8 Revision history
Table 8. Document revision history
Date Revision Changes
08-Aug-2001 1 First release corresponding to preliminary data version of datasheet.
09-Sep-2001 2
Datasheet updated for Maturity 30:
ESD sensitive device sentence added
4 curves updated
Electrical parameters updated
01-Dec-2003 3
Specific content changes as follows:
Application diagrams updated
Releases on curves
Application schematic diagram update
Electrical parameters updated
01-Apr-2005 4
Pin connection updated on Figure 1 on page 4.
Rthja value added on Table 1 on page 3.
Schematic updated on Figure 2 on page 6.
Schematic updated on Figure 26 on page 19.
14-Oct- 2005 5 PPAP reference inserted in the datasheet, see order codes table.
13-Nov-2007 6
Document reformatted with minor text changes.
Added footnote for automotive grade order codes to order codes
table.
28-May-2009 7
Added data at -40° C < Tamb < +85° C in Ta b le 4 .
Updated package mechanical drawing in Chapter 6: Package
information.
TSH512
Doc ID 8120 Rev 7 31/31
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