The Texas Instruments ADS1256IDBR is a 24-bit Sigma-Delta ADC with an integrated programmable gain amplifier (PGA) and an input multiplexer (MUX-PGA-ADC configuration). It samples at 30 kSPS and communicates over an SPI interface. The 24-bit resolution gives this ADC a theoretical dynamic range of about 138 dB, making it suitable for precision measurement applications like weigh scales, pressure transducers, and thermocouple interfaces where microvolt-level signals need to be resolved. The 30 kSPS sampling rate is fast enough for multiplexing across all eight inputs (single-ended) or four differential pairs without dropping below 3.75 kSPS per channel, which covers most industrial sensor readout rates.
Supply rails and signal interface — what to budget on the board
The PGA feature (listed as a key feature) provides gain settings that amplify small sensor signals before conversion, reducing the noise contribution from downstream stages. The input multiplexer accepts both differential and single-ended signals, with up to four differential or eight single-ended channels.