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.