BLOCK DIAGRAM

2/95

FEATURES

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10 Bit Resolution

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1.1

µs Output Rise Time

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2.5

µs Settling Time to 1%

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Single +5V Supply

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Monotonic

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Low Power Sleep Mode

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Three-wire Serial Interface

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20MHz Data Rate

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8 Pin SOIC and DIL Package

DESCRIPTION

The UCC5950 is a self-contained, microprocessor-compatible 10-bit D/A con-

verter. It contains all of the functions required to take data directly from a three-

wire serial data bus and convert it to a precise voltage, including: an input shift

register, data latches, a precision voltage reference, a precision 10-bit digital to

analog converter, and an output buffer amplifier.

The serial data interface is capable of clock frequencies as high as 20MHz, al-

lowing update rates as high as two words per microsecond. The UCC5950 ac-

cepts commands encoded as 2’s-complement binary.

The data converter in the UCC5950 is inherently monotonic, making this part

ideal for use in closed-loop servo control systems as well as open-loop data

conversion. The UCC5950 uses a unique segmented data converter which of-

fers differential linearity better than 1 LSB, integral linearity better than 2 LSB,

and fast conversion.

UCC5950

10-Bit Serial D/A Converter

UDG-95034