SBAU206B april 2015 – may 2023 ADS1262 , ADS1263
The ADS1263 has a total of 11 analog input pins: AIN0 through AIN9 plus a common input, AINCOM. This design allows the ADS1263 to be configured for up to five differential input pairs, 10 single-ended inputs referenced to a common voltage, or a combination of single-ended and differential inputs. The flexible input multiplexer of the ADS1263 allows any two inputs to be selected for either the positive or negative ADC input.
Any AINx pin can be used as a common input when measuring single-ended signals. However, AINCOM is specifically designed to serve this purpose because AINCOM can provide a bias voltage (level-shift function). This voltage biases floating sensors to help meet the common-mode voltage requirements of the AD1263 PGA.
All ADC analog inputs are pinned out on the ADS1263EVM. The supporting circuitry provides filtering and ratiometric connections for a variety of sensors. Additionally, terminal block J4 can be used for thermocouple inputs (see Section 3.1.2.1). Terminal block J5 shows the connection and input filter for AINCOM. Figure 3-1 shows the schematic of the ADS1263EVM analog input circuitry.