ADS7863A - Dual, 2MSPS, 12-Bit, 2+2 or 3+3 Channel, Simultaneous Sampling SAR ADC

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 AV_DD and BV_DD), 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.

• 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)