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.