S/H

Comparator

CDAC

Input

MUX

AV

DD

REF

IN

SAR

S/H

Comparator

CDAC

Input

MUX

REF

OUT

AGND

SAR

10-Bit DAC

2.5-V Reference

CHA0+

CHA0-

CHA1+

CHA1-

BV

DD

SDOA

SDOB

M0

M1

SDI

CLOCK

CS

RD

BUSY

CONVST

BGND

CHB0+

CHB0-

CHB1+

CHB1-

ADS7863A

www.ti.com

SBAS610 – DECEMBER 2013

Dual, 2-MSPS, 12-Bit, 2 + 2 or 3 + 3 Channel, Simultaneous-Sampling,

Analog-to-Digital Converter

Check for Samples: ADS7863A

1

FEATURES

DESCRIPTION

The ADS7863A is a dual, 12-bit, 2-MSPS, analog-to-

2

•

Four Fully- or Six Pseudo-Differential Inputs

digital converter (ADC) with four fully-differential or six

•

SNR: 71 dB

pseudo-differential input channels grouped into two

•

THD: –81 dB

pairs for high-speed, simultaneous signal acquisition.

Inputs to the sample-and-hold (S/H) amplifiers are

•

Programmable and Buffered Internal 2.5-V

fully differential and are maintained differential to the

Reference

ADC input. This architecture provides excellent

•

Flexible Power-Down Features

common-mode rejection of 72 dB at 100 kHz, which

•

Variable Power-Supply Ranges: 2.7 V to 5.5 V

is a critical performance characteristic in noisy

environments.

•

Low-Power Operation: 45 mW at 5 V

•

Operating Temperature Range:

The device is pin-compatible with the ADS7861, but

offers additional features such as a programmable

–40°C to +125°C

reference output, flexible supply voltage (2.7 V to

•

Pin-Compatible with the ADS7861 and

ADS8361 (SSOP Package)

multiplexer with three channels per ADC, and several

power-down features.

APPLICATIONS

The device is offered in an SSOP-24 and a 4-mm ×

•

Motor Control

4-mm QFN-24 package. The device is specified over

•

Multi-Axis Positioning Systems

the extended operating temperature range of –40°C

to +125°C.

•

Three-Phase Power Control

Functional Block Diagram

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.