DAC122S085_14 Datasheet, PDF (1/28 Pages) Texas Instruments – DAC122S085 12-Bit Micro Power DUAL Digital-to-Analog Converter with Rail-to-Rail Output

DAC122S085
www.ti.com
SNAS361E – MAY 2006 – REVISED MARCH 2013
DAC122S085 12-Bit Micro Power DUAL Digital-to-Analog Converter with Rail-to-Rail
Output
Check for Samples: DAC122S085
FEATURES
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•23 Ensured 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
APPLICATIONS
• Battery-Powered Instruments
• Digital Gain and Offset Adjustment
• Programmable Voltage & Current Sources
• Programmable Attenuators
KEY SPECIFICATIONS
• Resolution: 12 Bits
• INL: ±8 LSB (Max)
• DNL: +0.7 / -0.5
• Settling Time 8.5 µs (Max)
• Zero Code Error: +15 mV (Max)
• Full-Scale Error: -0.75 %FS (Max)
• Supply Power
– Normal: 0.6 mW (3V) / 1.6 mW (5V) (Typ)
– Power Down: 0.3 µW (3V) / 0.8 µW (5V)
(Typ)
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 consumes 0.6 mW at 3V and 1.6 mW at
5V. The DAC122S085 is packaged in 10-lead SON
and VSSOP packages. The 10-lead SON package
makes the DAC122S085 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, 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 consumption to less than a microWatt
with three different termination 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
extended industrial temperature range of −40°C to
+105°C.
Pin Configuration
V_{A 1}
V_{OUTA 2}
V_{OUTB 3}
NC 4
NC 5
10
9
SON 8
7
6
SCLK
SYNC
D_IN
V_REFIN
GND
V_A
V_OUTA
V_OUTB
NC
NC
1
10
2
9
3 VSSOP 8
4
7
5
6
SCLK
SYNC
D_IN
V_REFIN
GND
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SPI is a trademark of Motorola, Inc..
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All other trademarks are the property of their respective owners.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006–2013, Texas Instruments Incorporated