8 Detailed Description

8.1 Overview

The 10-bit DAC53508 and 8-bit DAC43508 (DACx3508) are a pin-compatible family of eight-channel, buffered

voltage-output digital-to-analog converters (DACs). With an external reference ranging from 1.8 V to 5.5 V, a

full-scale output voltage of 1.8 V to 5.5 V is achievable. These devices are specified monotonic across the

power-supply range.

Communication to the devices is established through a three-wire SPI-compatible interface. These devices do

not support readback operation. These devices include a load DAC (LDAC) pin for simultaneous DAC updates

and a clear (CLR) pin for setting the outputs to zero scale.

The DACx3508 devices are characterized for operation over the temperature range of –40°C to +125°C and are

available in tiny QFN packages.

8.2 Functional Block Diagram

VOUTA

DAC

Registers

BUF

Channel A

Power-Down Logic

Resistive Network

Power-On Reset

DACx3508

SCLK

SDI

SYNC

DAC

VDD

VREFIN

AGND

LDAC

Channel H

VOUTH

CLR

DAC53508, DAC43508

SLASF08 – DECEMBER 2021

www.ti.com

18

Submit Document Feedback

Copyright © 2021 Texas Instruments Incorporated

Product Folder Links: DAC53508 DAC43508