On-board high precision ADS1256IDB ADC chip; Onboard ADR03 2.5V power reference chip; The data output rate can reach 30ksps, and the low nonlinearity is 0.0010 %; The module can be configured as 8 single-ended inputs or 4 differential inputs; The ADS1256 module is suitable for measuring analog voltage within 3V, Module operating voltage 5V