DAC102S085_07 Datasheet, PDF (1/20 Pages) –

January 2007
DAC102S085
10-Bit Micro Power DUAL Digital-to-Analog Converter with
Rail-to-Rail Output
General Description
The DAC102S085 is a full-featured, general purpose DUAL
10-bit voltage-output digital-to-analog converter (DAC) that
can operate from a single +2.7V to 5.5V supply and consumes
0.6 mW at 3V and 1.6 mW at 5V. The DAC102S085 is pack-
aged in 10-lead LLP and MSOP packages. The 10-lead LLP
package makes the DAC102S085 the smallest DUAL DAC in
its class. The on-chip output amplifier allows rail-to-rail output
swing and the three 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 sup-
ply voltages in the 2.7V to 3.6V range. The serial interface is
compatible with standard SPI™, QSPI, MICROWIRE and
DSP interfaces.
The reference for the DAC102S085 serves both channels and
can vary in voltage between 1V and V_A, providing the widest
possible output dynamic range. The DAC102S085 has a 16-
bit input shift register that controls the outputs to be updated,
the mode of operation, the powerdown condition, and the bi-
nary input data. Both outputs can be updated simultaneously
or individually depending on the setting of the two mode of
operation bits.
A power-on reset circuit ensures that the DAC output powers
up to zero volts and remains there until there is a valid write
to the device. A power-down feature reduces power con-
sumption to less than a microWatt with three different termi-
nation options.
The low power consumption and small packages of the
DAC102S085 make it an excellent choice for use in battery
operated equipment.
The DAC102S085 is one of a family of pin compatible DACs,
including the 8-bit DAC084S085 and the 12-bit DAC122S085.
The DAC102S085 operates over the extended industrial tem-
perature range of −40°C to +105°C.
Features
■ ^{Guaranteed Monotonicity}
■ ^{Low Power Operation}
■ ^{Rail-to-Rail Voltage Output}
■ ^{Power-on Reset to 0V}
■ ^{Simultaneous Output Updating}
■ ^{Wide power supply range (+2.7V to +5.5V)}
■ ^{Industry's Smallest Package}
■ ^{Power Down Modes}
Key Specifications
■ ^Resolution
■ ^INL
■ ^DNL
■ ^{Settling Time}
■ ^{Zero Code Error}
■ ^{Full-Scale Error}
■ ^{Supply Power}
■ — ^Normal
— Power Down
10 bits
±2 LSB (max)
+0.35 / −0.25 LSB (max)
6 µs (max)
+15 mV (max)
−0.75 %FS (max)
0.6 mW (3V) / 1.6 mW (5V) typ
0.3 µW (3V) / 0.8 µW (5V) typ
Applications
■ ^{Battery-Powered Instruments}
■ ^{Digital Gain and Offset Adjustment}
■ ^{Programmable Voltage & Current Sources}
■ ^{Programmable Attenuators}
Pin Configuration
20195501
SPI™ is a trademark of Motorola, Inc.
© 2007 National Semiconductor Corporation
201955
20195502
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