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2.7-V to 5.5-V Single-Supply Operation

Four 8-Bit Voltage Output DACs

One-Half Power 8-Bit Voltage Output DAC

Fast Serial Interface . . . 1 MHz Max

Simple Two-Wire Interface In Single

Buffered Mode

High-Impedance Reference Inputs For Each

DAC

Programmable for 1 or 2 Times Output

Range

Simultaneous-Update Facility In

Double-Buffered Mode

Internal Power-On Reset

Industry Temperature Range

Low Power Consumption

Half-Buffered Output

Power-Down Mode

applications

Programmable Voltage Sources

Digitally-Controlled Amplifiers/Attenuators

Cordless/Wireless Communications

Automatic Test Equipment

Portable Test Equipment

Process Monitoring and Control

Signal Synthesis

description

The TLV5621I is a quadruple 8-bit voltage output

digital-to-analog converter (DAC) with buffered

reference inputs (high impedance). The DAC

produces an output voltage that ranges between

either one or two times the reference voltages and

GND, and the DAC is monotonic. The device is

simple to use since it operates from a single

supply of 2.7 V to 5.5 V. A power-on reset function

is incorporated to provide repeatable start-up

conditions. A global hardware shut-down terminal

and the capability to shut down each individual

DAC with software are provided to minimize

power consumption.

Digital control of the TLV5621I is over a simple 3-wire serial bus that is CMOS compatible and easily interfaced

to all popular microprocessor and microcontroller devices. A TLV5621I 11-bit command word consists of

eight bits of data, two DAC select bits, and a range bit for selection between the times one or times two output

range. The TLV5621I digital inputs feature Schmitt triggers for high noise immunity. The DAC registers are

double buffered which allows a complete set of new values to be written to the device, and then under control

of the HWACT signal, all of the DAC outputs are updated simultaneously.

The 14-terminal small-outline (D) package allows digital control of analog functions in space-critical

applications. The TLV5621I does not require external trimming. The TLV5621I is characterized for operation

from –40°C to 85°C.