DAC7760IPWPR datasheet(26/63 Pages) TI1

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DAC

GND

DACx760

AVDD

DVDD-EN

AVSS

DVDD

Pre-

Conditioning

Current

Source

ENABLE

ISET-R

GAIN

ENABLE

Current Output Stage

Voltage Output Stage

Watchdog

Timer

Slew Rate

Control

User Calibration

Gain/Offset

DAC Input

Thermal

Alarm

Internal

Reference

CMP

–VSENSE

+VSENSE

VOUT

IOUT

ALARM

BOOST

REFOUT

REFIN

HART-IN

LATCH

SCLK

DIN

SDO

CLR

CLR-SEL

DAC7760, DAC8760

SBAS528B – JUNE 2013 – REVISED JUNE 2016

www.ti.com

Product Folder Links: DAC7760 DAC8760

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8 Detailed Description

8.1 Overview

The DAC8760 and DAC7760 are low-cost, precision, fully-integrated, 16-bit an 12-bit digital-to-analog converters

(DACs) designed to meet the requirements of industrial process control applications. These devices can be

programmed as a current output with a range of 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA; or as a

voltage output with a range of 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V, with a 10% overrange (0 V to 5.5 V, 0 V to

11 V, ±5.5 V, or ±11 V). Both current and voltage outputs can be simultaneously enabled while being controlled

by a single data register.

These devices include a power-on-reset function to ensure powering up in a known state (both IOUT and VOUT

are disabled and in a high-impedance state). The CLR and CLR-SEL pins set the voltage outputs to zero-scale

or mid-scale, and the current output to the low-end of the range, if the output is enabled. Zero code error and

gain error calibration registers can be programmed to digitally calibrate the device in the end system. The output

slew rate is also programmable. These devices can AC couple an external HART signal on the current output

and can operate with either a single 10-V to 36-V supply, or dual supplies up to ±18 V.

8.2 Functional Block Diagram

8.3 Feature Description

8.3.1 DAC Architecture

The DAC8760 and DAC7760 (DACx760) consist of a resistor-string digital-to-analog converter (DAC) followed by

a buffer amplifier. The output of the buffer drives the current output and the voltage output. The resistor-string

section is simply a string of resistors, each of value R, from REF to GND, as Figure 82 illustrates. This type of

architecture makes sure the DAC is monotonic. The 16-bit binary digital code (DAC8760) loaded to the DAC

DAC7760IPWPR Datasheet(PDF) 26 Page - Texas Instruments

DAC7760IPWPR Datasheet(HTML) 26 Page - Texas Instruments

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