1FEATURES

2? Six Pseudo- or Four Fully Differential Inputs

? SNR: 71.7dB, THD: –87dB

? Programmable Channel Sequencer

? Programmable and Buffered Internal 2.5V

Reference

? Flexible Power-Down Features

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

? Low-Power Operation: 44mW Maximum at 5V

? Operating Temperature Range:

–40°C to +125°C

? Pin-Compatible Upgrade for the ADS7862

APPLICATIONS

? Motor Control

? Multi-Axis Positioning Systems

? Three-Phase Power Control

DESCRIPTION

The ADS7865 is a dual, 12-bit, 2MSPS 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 differentially to

the input of the ADC. This architecture provides

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

which is a critical performance characteristic in noisy

environments.

The ADS7865 is pin-compatible with the ADS7862,

but offers additional features such as a

programmable channel sequencer and reference

output, flexible supply voltage (2.7V to 5.5V for AVDD

and BVDD), a pseudo-differential input multiplexer with three channels per ADC, and several power-down

features.

The ADS7865 is offered in a TQFP-32 package. It is

specified over the extended operating temperature

range of –40°C to +125°C.