DAC104S085 10-Bit Micro Power QUAD Digital-to-Analog Converter with Rail-to-Rail Output
June 2006
DAC104S085
10-Bit Micro Power QUAD Digital-to-Analog Converter
with Rail-to-Rail Output
General Description
The DAC104S085 is a full-featured, general purpose QUAD
10-bit voltage-output digital-to-analog converter (DAC) that
can operate from a single +2.7V to 5.5V supply and uses
350 µA at 3V and 500 µA at 5V. The DAC104S085 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 DAC104S085 serves all four channels
and can vary in voltage between 1V and V
A
, providing the
widest possible output dynamic range. The DAC104S085
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
DAC104S085 make it an excellent choice for use in battery
operated equipment.
The DAC104S085 is one of a family of pin compatible DACs,
including the 8-bit DAC084S085 and the 12-bit
DAC124S085. The DAC104S085 operates over the ex-
tended industrial temperature range of −40˚C to +105˚C.
Features
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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)
Power Down Modes
Key Specifications
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Resolution
INL
DNL
Settling Time
Zero Code Error
Full-Scale Error
Supply Current
— Normal
— Pwr Down
10 bits
±
2 LSB (max)
+0.35 / −0.25 LSB (max)
6 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
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Battery-Powered Instruments
Digital Gain and Offset Adjustment
Programmable Voltage & Current Sources
Programmable Attenuators
Pin Configuration
20195302
SPI
™
is a trademark of Motorola, Inc.
© 2006 National Semiconductor Corporation
DS201953
www.national.com
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