DAC082S085 Datasheet, PDF (1/19 Pages) National Semiconductor (TI) – 8-Bit Micro Power DUAL Digital-to-Analog Converter with Rail-to-Rail Output

PRELIMINARY
May 2006
DAC082S085
8-Bit Micro Power DUAL Digital-to-Analog Converter with
Rail-to-Rail Output
General Description
The DAC082S085 is a full-featured, general purpose DUAL
8-bit voltage-output digital-to-analog converter (DAC) that
can operate from a single +2.7V to 5.5V supply and con-
sumes 210 µA at 3V and 320 µA at 5V. The DAC082S085 is
packaged in 10-lead LLP and MSOP packages. The 10-lead
LLP package makes the DAC082S085 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 supply voltages in the 2.7V to 3.6V range. The serial
interface is compatible with standard SPI™, QSPI, MI-
CROWIRE and DSP interfaces.
The reference for the DAC082S085 serves both channels
and can vary in voltage between 1V and V_A, providing the
widest possible output dynamic range. The DAC082S085
has a 16-bit input shift register that controls the outputs to be
updated, the mode of operation, the powerdown condition,
and the binary 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
DAC082S085 make it an excellent choice for use in battery
operated equipment.
The DAC082S085 is one of a family of pin compatible DACs,
including the 10-bit DAC102S085 and the 12-bit
DAC124S085. The DAC082S085 operates over the ex-
tended industrial temperature range of −40˚C to +105˚C.
Features
n Guaranteed Monotonicity
n Low Power Operation
n Rail-to-Rail Voltage Output
n Power-on Reset to 0V
n Simultaneous Output Updating
n Wide power supply range (+2.7V to +5.5V)
n Industry’s Smallest Package
n Power Down Modes
Key Specifications
n Resolution
8 bits
n INL
±0.5 LSB (max)
n DNL
+0.18 / −0.13 LSB (max)
n Settling Time
4.5 µs (max)
n Zero Code Error
+15 mV (max)
n Full-Scale Error
−0.75 %FS (max)
n Power Consumption
— Normal
270 µA (3.6V) / 410 µA (5.5V) max
— Pwr Down
20 nA (3.6V) / 30 nA (5.5V) typ
Applications
n Battery-Powered Instruments
n Digital Gain and Offset Adjustment
n Programmable Voltage & Current Sources
n Programmable Attenuators
Pin Configuration
20195601
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© 2006 National Semiconductor Corporation DS201956
20195602
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