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.