1FEATURES
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 VA
• 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 VA (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.