Maxim's MAX11253 is a 6-channel, 16-bit, delta-sigma ADC that achieves exceptional performance while consuming very low power. Sample rates up to 64ksps allow precision DC measurements. It communicates via serial peripheral interface (SPI) and is available in a small (5 mm x 5 mm) TQFN package. The MAX11253 offers a 6.2 nV/√Hz noise programmable gain amplifier (PGA) with gain settings from 1x to 128x. The integrated PGA provides isolation of the signal inputs from the switched capacitor sampling network. The PGA also enables the MAX11253 to interface directly with high-impedance sources without compromising available dynamic range. The device operates from a single 2.7 V to 3.6 V analog supply or split ±1.8 V analog supplies, allowing the analog input to be sampled below ground. The digital supply range is 1.7 V to 2.0 V or 2.0 V to 3.6 V, allowing communication with 1.8 V, 2.5 V, 3 V, or 3.3 V logic.