DAC121S101_14 Datasheet, PDF (1/28 Pages) Texas Instruments – 12-Bit Micro Power, RRO Digital-to-Analog Converter

DAC121S101
www.ti.com
SNAS265H – JUNE 2005 – REVISED FEBRUARY 2010
DAC121S101/DAC121S101Q 12-Bit Micro Power, RRO Digital-to-Analog Converter
Check for Samples: DAC121S101
FEATURES
1
•23 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
APPLICATIONS
• Battery-Powered Instruments
• Digital Gain and Offset Adjustment
• Programmable Voltage & Current Sources
• Programmable Attenuators
• Automotive
DESCRIPTION
The DAC121S101 is a full-featured, general purpose 12-bit voltage-output digital-to-analog converter (DAC) that
can operate 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 interface 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 devices 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 temperature 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 SOT and
an 8-lead VSSOP and the DAC121S101Q is available in the 6-lead SOT only.
Resolution
DNL
Output Settling Time
Zero Code Error
Full-Scale Error
Power Consumption
Table 1. Key Specifications
Normal Mode
Pwr Down Mode
VALUE
12
+0.25, -0.15
8 µs (typ)
4 mV (typ)
−0.06 %FS (typ)
0.64mW (3.6V) / 1.43mW
(5.5V) typ
0.14µW (3.6V) / 0.39µW
(5.5V) typ
UNIT
bits
LSB (typ)
1
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..
2
All other trademarks are the property of their respective owners.
3
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 © 2005–2010, Texas Instruments Incorporated