1FEATURES

2• Four Fully- or Six Pseudo-Differential Inputs

• SNR: 71 dB

• THD: –81 dB

• Programmable and Buffered Internal 2.5-V

Reference

• Flexible Power-Down Features

• Variable Power-Supply Ranges: 2.7 V to 5.5 V

• Low-Power Operation: 45 mW at 5 V

• Operating Temperature Range:

–40°C to +125°C

• Pin-Compatible with the ADS7861 and

ADS8361 (SSOP Package)

APPLICATIONS

• Motor Control

• Multi-Axis Positioning Systems

• Three-Phase Power Control

DESCRIPTION

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

digital converter (ADC) with four fully-differential or six pseudo-differential input channels grouped into two

pairs for high-speed, simultaneous signal acquisition.

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

fully differential and are maintained differential to the

ADC input. This architecture provides excellent common-mode rejection of 72 dB at 100 kHz, which

is a critical performance characteristic in noisy

environments.

The device is pin-compatible with the ADS7861, but

offers additional features such as a programmable

reference output, flexible supply voltage (2.7 V to

5.5 V for AVDD and BVDD), a pseudo-differential input multiplexer with three channels per ADC, and several

power-down features.

The device is offered in an SSOP-24 and a 4-mm × 4-mm QFN-24 package. The device is specified over

the extended operating temperature range of –40°C

to +125°C.