DAC161S055_13 Datasheet, PDF (1/27 Pages) Texas Instruments – DAC161S055 Precision 16-Bit, Buffered Voltage-Output DAC

DAC161S055
www.ti.com
SNAS503B – NOVEMBER 2010 – REVISED JANUARY 2012
DAC161S055 Precision 16-Bit, Buffered Voltage-Output DAC
Check for Samples: DAC161S055
FEATURES
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•2 16-bit DAC with a Two-buffer SPI Interface
• Asynchronous Load DAC and Reset Pins
• Compatibility with 1.8V Controllers
• Buffered Voltage Output with Rail-to-Rail
Capability
• Wide Voltage Reference Range of +2.5V to V_A
• Wide Temperature Range of −40°C to +105°C
• Packaged in a 16-pin WQFN
APPLICATIONS
• Process Control
• Automatic Test Equipment
• Programmable Voltage Sources
• Communication Systems
• Data Acquisition
• Industrial PLCs
• Portable Battery Powered Instruments
KEY SPECIFICATIONS
• Resolution (Specified Monotonic) 16 bits
• INL ±3 LSB (max)
• Very Low Output Noise 120 nV/√Hz (typ)
• Glitch Impulse 7 nV-s (typ)
• Output Settling Time 5 µs (typ)
• Power Consumption 5.5 mW at 5.25 V (max)
DESCRIPTION
The DAC161S055 is a precision 16-bit, buffered
voltage output Digital-to-Analog Converter (DAC) that
operates from a 2.7V to 5.25V supply with a separate
I/O supply pin that operates down to 1.7V. The on-
chip precision output buffer provides rail-to-rail output
swing and has a typical settling time of 5 µsec. The
external voltage reference can be set between 2.5V
and V_A (the analog supply voltage), providing the
widest dynamic output range possible.
The 4-wire SPI compatible interface operates at clock
rates up to 20 MHz. The part is capable of Diasy
Chain and Data Read Back. An on board power-on-
reset (POR) circuit ensures the output powers up to a
known state.
The DAC161S055 features a power-up value pin
(MZB), a load DAC pin (LDACB) and a DAC clear
(CLRB) pin. MZB sets the startup output voltage to
either GND or mid-scale. LDACB updates the output,
allowing multiple DACs to update their outputs
simultaneously. CLRB can be used to reset the
output signal to the value determined by MZB.
The DAC161S055 has a power-down option that
reduces power consumption when the part is not in
use. It is available in a 16-lead WQFN package.
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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 © 2010–2012, Texas Instruments Incorporated