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DAC9881-DAC9881SBRGER-DAC9881SRGET
18-Bit, Single Channel, Low Noise, Voltage Output Digital-To-Analog Converter
Control
Logic
DGND IOVDD AGND AVDD V -SREFHV -FREFH
RST
RSTSEL
GAIN
Input
Register
DAC
Latch
Resistor
Network
DAC9881
Power-On
Reset
PDN
Product
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Technical
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Reference
Design
DAC9881SBAS438B –MAY 2008–REVISED SEPTEMBER 2016
DAC9881 18-Bit, Single-Channel, Low-Noise, Voltage-Output
Digital-to-Analog Converter Features 18-Bit Monotonic Over Temperature Range Relative Accuracy: ±2 LSB Maximum Low-Noise:24 nV/√Hz Fast Settling:5μs On-Chip Output Buffer Amplifier With Rail-to-Rail
Operation Single Power Supply: 2.7Vto 5.5V DAC Loading Control Selectable Power-On Resetto Zero-Scaleor
Midscale Power-Down Mode Unipolar Straight Binaryor
Twos Complement Input Mode Fast SPI Interface With Schmitt-Triggered Inputs:to50 MHz, 1.8-V, 3-V, and 5-V Logic Small Package: VQFN-24,4 mm×4 mm
Applications Automatic Test Equipment Precision Instrumentation Industrial Controls Data Acquisition Systems
DescriptionThe DAC9881
output digital-to-analog
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
achieved over the full supply rangeof 2.7Vto 5.5
The device supportsa standard SPI serial interface
capableof operating with input data clock frequenciesto 50 MHz. The DAC9881 requires an external
reference voltageto set the output rangeof the DAC
channel.A programmable power-on reset circuit
also incorporated into the deviceto ensure that
DAC output powersupat zero-scaleor midscale,
remains there untila valid write command.
Additionally, the DAC9881 has the capability
functionin either
complement mode.
power operation.
mode can be achieved by accessing the PDN
thereby reducing the current consumptionto 25 µAV. Power consumptionis4 mWat5V, reducing
125 µWin power-down mode.
The DAC9881is availableina4 mm×4 mm VQFN- package witha specified temperature rangeof
–40°Cto 105°C.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Block Diagram
