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DAC121S101EVAL 数据手册 - TI（德州仪器）
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DAC121S101EVAL数据手册
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DAC121S101/DAC121S101Q
February 19, 2010
12-Bit Micro Power, RRO Digital-to-Analog Converter
General Description
The DAC121S101 is a full-featured, general purpose 12-bit
voltage-output digital-to-analog converter (DAC) that can op-
erate from a single +2.7V to 5.5V supply and consumes just
177 µA of current at 3.6 Volts. The on-chip output amplifier
allows rail-to-rail output swing and the three wire serial inter-
face operates at clock rates up to 30 MHz over the specified
supply voltage range and is compatible with standard SPI™,
QSPI, MICROWIRE and DSP interfaces. Competitive de-
vices are limited to 20 MHz clock rates at supply voltages in
the 2.7V to 3.6V range.
The supply voltage for the DAC121S101 serves as its voltage
reference, providing the widest possible output dynamic
range. 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.
The low power consumption and small packages of the
DAC121S101 make it an excellent choice for use in battery
operated equipment.
The DAC121S101 is a direct replacement for the AD5320 and
the DAC7512 and is one of a family of pin compatible DACs,
including the 8-bit DAC081S101 and the 10-bit DAC101S101.
The DAC121S101 operates over the extended industrial tem-
perature range of −40°C to +105°C while the DAC121S101Q
operates over the Grade 1 automotive temperature range of
−40°C to +125°C. The DAC121S101 is available in a 6-lead
TSOT and an 8-lead MSOP and the DAC121S101Q is avail-
able in the 6-lead TSOT only.
Features
■
DAC121S101Q is AEC-Q100 Grade 1 qualified and is
manufactured on an Automotive Grade Flow.
■
Guaranteed Monotonicity
■
Low Power Operation
■
Rail-to-Rail Voltage Output
■
Power-on Reset to Zero Volts Output
■
Wide Temperature Range of −40°C to +125°C
■
Wide Power Supply Range of +2.7V to +5.5V
■
Small Packages
■
Power Down Feature
Key Specifications
■
Resolution 12 bits
■
DNL +0.25, -0.15 LSB (typ)
■
Output Settling Time 8 µs (typ)
■
Zero Code Error 4 mV (typ)
■
Full-Scale Error −0.06 %FS (typ)
■
Power Consumption
■
—
Normal Mode 0.64mW (3.6V) / 1.43mW (5.5V) typ
—
Pwr Down Mode 0.14µW (3.6V) / 0.39µW (5.5V) typ
Applications
■
Battery-Powered Instruments
■
Digital Gain and Offset Adjustment
■
Programmable Voltage & Current Sources
■
Programmable Attenuators
■
Automotive
Pin Configuration
20114901
20114902
SPI™ is a trademark of Motorola, Inc.
© 2010 National Semiconductor Corporation 201149 www.national.com
DAC121S101/DAC121S101Q 12-Bit Micro Power, RRO Digital-to-Analog Converter
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