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.