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1 Features

1? Relative Accuracy: 8 LSB

? Glitch Energy: 0.1 nV-s

? MicroPower Operation: 140 μA at 2.7 V

? Power-On Reset to Midscale

? 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

Output Amplifier

? Power-Down Capability

? 2's Complement Input

? SYNC Interrupt Facility

? Drop-In Compatible with DAC8531/01 and

DAC8551 (Binary Input)

? Available in a Tiny MSOP-8 Package

2 Applications

? Process Control

? Data Acquisition Systems

? Closed-Loop Servo-Control

? PC Peripherals

? Portable Instrumentation

? Programmable Attenuation

3 Description

The DAC8550 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

DAC8550 uses a versatile, 3-wire serial interface that

operates at clock rates of up to 30 MHz and is

compatible with standard SPI?, QSPI?,

Microwire?, and digital signal processor (DSP)

interfaces.

The DAC8550 requires an external reference voltage

to set its output range. The DAC8550 incorporates a

power-on reset circuit that ensures that the DAC

output powers up at midscale and remains there until

a valid write takes place to the device. The DAC8550

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 ideal for portable, battery-operated

equipment. Power consumption is 0.38 mW at 2.7 V,

reducing to less than 1 μW in power-down mode.

The DAC8550 is available in an MSOP-8 package.

For additional flexibilty, see the DAC8551, a binarycoded

counterpart to the DAC8550.