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1 Features

1? Ensured Monotonicity

? Low Power Operation

? Rail-to-Rail Voltage Output

? Daisy-Chain Capability

? Power-on Reset to 0 V

? Simultaneous Output Updating

? Individual Channel Power-Down Capability

? Wide Power Supply Range (2.7 V to 5.5 V)

? Dual Reference Voltages With Range of 0.5 V to

VA

? Operating Temperature Range of ?40°C to 125°C

? Smallest Package in the Industry

? Resolution 12 Bits

? INL ±8 LSB (Maximum)

? DNL 0.75 / ?0.4 LSB (Maximum)

? Settling Time 8.5 μs (Maximum)

? Zero Code Error 15 mV (Maximum)

? Full-Scale Error ?0.75 %FSR (Maximum)

? Supply Power

– 1.95 mW (3 V) / 4.85 mW (5 V) Typical

– Power Down 0.3 μW (3 V) / 1 μW (5 V) Typical

2 Applications

? Battery-Powered Instruments

? Digital Gain and Offset Adjustment

? Programmable Voltage and Current Sources

? Programmable Attenuators

? Voltage Reference for ADCs

? Sensor Supply Voltage

? Range Detectors

3 Description

The DAC128S085 is a full-featured, general-purpose

OCTAL 12-bit voltage-output digital-to-analog converter (DAC) that can operate from a single 2.7-V

to 5.5-V supply and consumes 1.95 mW at 3 V and

4.85 mW at 5 V. The DAC128S085 is packaged in a

16-lead WQFN package and a 16-lead TSSOP package. The WQFN package makes the

DAC128S085 the smallest OCTAL DAC in its class.

The on-chip output amplifiers allow rail-to-rail output

swing, and the 3-wire serial interface operates at

clock rates up to 40 MHz over the entire supply voltage range. Competitive devices are limited to 25-

MHz clock rates at supply voltages in the 2.7-V to

3.6-V range. The serial interface is compatible with

standard SPI?, QSPI, MICROWIRE, and DSP

interfaces. The DAC128S085 also offers daisy-chain operation, where an unlimited number of

DAC128S085s can be updated simultaneously using

a single serial interface.

There are two references for the DAC128S085. One

reference input serves channels A through D, while

the other reference serves channels E through H. Each reference can be set independently between

0.5 V and VA, providing the widest possible output

dynamic range. The DAC128S085 has a 16-bit input

shift register that controls the mode of operation, the

power-down condition, and the register/output value

of the DAC channels. All eight DAC outputs can be updated simultaneously or individually.