7 Detailed Description

7.1 Overview

The DAC82002 device is a dual-channel, unbuffered voltage output, 16

‑bit digital-to-analog converter (DAC)

operating from a single 3.3-V to 5-V power supply. This converter provides 1-LSB DNL and 2-LSB INL linearity.

With a 10-pF load, the output of the DAC82002 settles to ½ LSB of full scale at 1 µs. The glitch impulse of 1-LSB

code change around major carry is 0.5 nV-s.

The device incorporates a power-on-reset circuit to make sure that the DAC output powers up at zero scale

or midscale, depending on status of the RSTSEL pin, and remains at that scale until a valid code is written

to the device. All internal registers are asynchronously reset after the RESET pin is pulled low. Similar to the

power-on-reset, the RESET signal sets the DAC output to zero scale or midscale based on the status of the

RSTSEL pin.

The digital interface of the DAC82002 uses a 3-wire serial peripheral interface (SPI) that operates at clock rates

of up to 50 MHz.

7.2 Functional Block Diagram

VOUTA

DAC

Register

DAC

Buffer

Power On Reset

VREF

SCLK

SDIN

AGND

VDD

DAC

RSTSEL

Channel A

Channel B

VOUTB

RESET

SYNC

DAC82002

SBASAK1A – AUGUST 2022 – REVISED DECEMBER 2022

www.ti.com

12

Submit Document Feedback

Copyright © 2022 Texas Instruments Incorporated

Product Folder Links: DAC82002