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DAC122S085CIMMX Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza DAC122S085CIMMX
Descripción Electrónicos  12-Bit Micro Power DUAL Digital-to-Analog Converter with Rail-to-Rail Output
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

DAC122S085CIMMX Datasheet(HTML) 1 Page - National Semiconductor (TI)

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DAC122S085
12-Bit Micro Power DUAL Digital-to-Analog Converter
with Rail-to-Rail Output
General Description
The DAC122S085 is a full-featured, general purpose DUAL
12-bit voltage-output digital-to-analog converter (DAC) that
can operate from a single +2.7V to 5.5V supply and uses
210 µA at 3V and 320 µA at 5V. The DAC122S085 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 DAC122S085 serves all four channels
and can vary in voltage between 1V and V
A, providing the
widest possible output dynamic range. The DAC122S085
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
DAC122S085 make it an excellent choice for use in battery
operated equipment.
The DAC122S085 is one of a family of pin compatible DACs,
including
the
8-bit
DAC082S085
and
the
10-bit
DAC102S085. The DAC122S085 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
12 bits
n
INL
±8 LSB (max)
n
DNL
+0.7 / −0.5 LSB (max)
n
Settling Time
8.5 µs (max)
n
Zero Code Error
+15 mV (max)
n
Full-Scale Error
−0.75 %FS (max)
n
Supply Current
— 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
20195202
SPIis a trademark of Motorola, Inc.
June 2006
© 2006 National Semiconductor Corporation
DS201952
www.national.com


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