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DAC9881 - Highest Accuracy DAC, 18-bit Monotonic Performance


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DAC9881 Block DiagramThe DAC9881 is an 18-bit, single-channel, voltage-output digital-to-analog converter (DAC). It features 18-bit monotonicity, excellent linearity, very low-noise, and fast settling time. The on-chip precision output amplifier allows rail-to-rail output swing to be achieved over the full supply range of 2.7V to 5.5V.

The device supports a standard SPI serial interface capable of operating with input data clock frequencies up to 50MHz. The DAC9881 requires an external reference voltage to set the output range of the DAC channel. A programmable power-on reset circuit is also incorporated into the device to ensure that the DAC output powers up at zero-scale or midscale, and remains there until a valid write command.   Datasheet

Additionally, the DAC9881 has the capability to function in either unipolar straight binary or two's complement mode. The DAC9881 provides low-power operation. To further save energy, power-down mode can be achieved by accessing the PDN pin, thereby reducing the current consumption to 25µA at 5A. Power consumption is 4mW at 5V, reducing to 125µW in power-down mode.

The DAC9881 is available in a 4mm x 4mm QFN-24 package with a specified temperature range of -40°C to +105°C.


Key Features
  • 18-Bit Monotonic Over Temperature Range
  • Relative Accuracy: ±2LSB Max
  • Low-Noise: 24nV/√Hz
  • Fast Settling: 5µs
  • On-Chip Output Buffer Amplifier with Rail-to-Rail Operation
  • Single Power Supply: +2.7V to +5.5V
  • DAC Loading Control
  • Selectable Power-On Reset to Zero-Scale or Midscale
  • Power-Down Mode
  • Unipolar Straight Binary or Twos Complement Input Mode
  • Fast SPI™ Interface with Schmitt-Triggered Inputs: up to 50MHz, 1.8V/3V/5V Logic
  • Small Package: QFN-24, 4mm × 4mm

Applications
  • Automatic Test Equipment
  • Precision Instrumentation
  • Industrial Control
  • Data Acquisition Systems
RoHS Compliant

Datasheet

Application Notes


Video Cast
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Block DiagramClick to View Full Block Diagram
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Pin AssignmentsClick to View Full Pin Configuration
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TI P/N
Digi-Key P/N
Packaging
Relative
Accuracy (LSB)
Differential
Nonlinearity (LSB)
Package
# of bits
 
DAC9881SRGET
Tape/Reel
±3
-1/+2
24-VQFN
18
Texas Instruments DAC9811 Datasheet
Cut Tape
Digi-Reel®
DAC9881SBRGET
Tape/Reel
±2
±1
24-VQFN
18
Texas Instruments DAC9811 Datasheet
Cut Tape
Digi-Reel®