3 V/5 V, 450 A, 16-Bit, Sigma-Delta ADC Features: Charge-balancing ADC 16-bits no missing codes 0.0015% nonlinearity Programmable gain front end Gains of 1, 2, 32 and 128 Differential input capability Three-wire serial interface Ability to buffer the analog input SPI-, QSPI™-, MICROWIRE™-, and DSP-compatible 3 V (AD7715-3) or 5 V (AD7715-5) operation Low supply current: 450 μA maximum @ 3 V supplies Low-pass filter with programmable output update 16-lead SOIC/PDIP/TSSOP