DAC084S085 Datasheet, PDF (1/18 Pages) National Semiconductor (TI) – 8-Bit Micro Power QUAD Digital-to-Analog Converter with Rail-to-Rail Output

June 2006
DAC084S085
8-Bit Micro Power QUAD Digital-to-Analog Converter
with Rail-to-Rail Output
General Description
The DAC084S085 is a full-featured, general purpose QUAD
8-bit voltage-output digital-to-analog converter (DAC) that
can operate from a single +2.7V to 5.5V supply and uses
370 µA at 3V and 500 µA at 5V. The DAC084S085 is
packaged in a 10-lead MSOP package. 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, MICROWIRE and DSP interfaces.
The reference for the DAC084S085 serves all four channels
and can vary in voltage between 1V and V_A, providing the
widest possible output dynamic range. The DAC084S085
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. All four 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
DAC084S085 make it an excellent choice for use in battery
operated equipment.
The DAC084S085 is one of a family of pin compatible DACs,
including the 10-bit DAC104S085 and the 12-bit
DAC124S085. The DAC084S085 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 Power Down Modes
Key Specifications
n Resolution
n INL
n DNL
n Settling Time
n Zero Code Error
n Full-Scale Error
n Supply Current
— Normal
— Pwr Down
8 bits
±0.5 LSB (max)
+0.18 / −0.13 LSB (max)
4.5 µs (max)
+15 mV (max)
−0.75 %FS (max)
485 µA (3.6V) / 650 µA (5.5V) max
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
20195402
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© 2006 National Semiconductor Corporation DS201954
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