1 Features

1• Relative Accuracy: 8LSB

• Glitch Energy: 0.1 nV-s

• MicroPower Operation: 140 μA at 2.7 V

• Power-On Reset to Zero

• Power Supply: 2.7 V to 5.5 V

• 16-Bit Monotonic

• Settling Time: 10 μs to ±0.003% FSR

• Low-Power Serial Interface with

Schmitt-Triggered Inputs

• On-Chip Output Buffer Amplifier with

Rail-to-Rail Operation

• Power-Down Capability

• Binary Input

• SYNC Interrupt Facility

• Drop-In Compatible With DAC85x1

and DAC8550 (2's Complement Input)

2 Applications

• Process Control

• Data Acquisition Systems

• Closed-Loop Servo-Control

• PC Peripherals

• Portable Instrumentation

• Programmable Attenuation

3 Description

The DAC8551 is a small, low-power, voltage output,

16-bit digital-to-analog converter (DAC). It is

monotonic, provides good linearity, and minimizes

undesired code-to-code transient voltages. The

DAC8551 uses a versatile 3-wire serial interface that

operates at clock rates to 30 MHz and is compatible

with standard SPI™, QSPI™, Microwire™, and digital

signal processor (DSP) interfaces.

The DAC8551 requires an external reference voltage

to set its output range. The DAC8551 incorporates a

power-on-reset circuit that ensures the DAC output

powers up at 0 V and remains there until a valid write

takes place to the device. The DAC8551 contains a

power-down feature, accessed over the serial

interface, that reduces the current consumption of the

device to 200 nA at 5 V.

The low-power consumption of this device in normal

operation makes it ideally suited for portable, batteryoperated

equipment. The power consumption is 0.38

mW at 2.7 V, reducing to less than 1 μW in

power‑down mode.

For additional flexibilty, see the DAC8550 (SLAS476),

a 2's complement-input counterpart to the DAC8551.