ads123DESCRIPTION. The ADS1232 and ADS1234 are precision 24-bit analog-to-dital converters (ADCs). The ADS1232 4 features an onboard, low noise programmable gain amplifier (PGA),The ADS1232 ADC Module has 10 pins: 3.3V: Module power supply – 3.3V 5V: Module power supply – 5V GND: Ground REFP: Reference Voltage; SCLK: Source Clock