Low power， 8-/16-channel， highly integrated multiplexed analog-to-digital converter （ADC） Integration Precision analog input buffers and reference input buffers 2.5 V precision reference （3.5 ppm/°C） Cross point multiplexer （enable system diagnostic） 8 full differential or 16 single-ended channels Clock oscillator GPIO and GPO pins with automatic external mux control Fast and flexible output rate： 1.25 SPS to 31.25 kSPS Channel scan data rate： 6.21 kSPS/channel （161 μs settling） Performance specifications 17.5 noise free bits at 31.25 kSPS 24 noise free bits at 1.25 SPS INL： ±3 ppm/FSR 85 dB rejection of 50 Hz and 60 Hz with 50 ms settling Operates with either 3.3 V or 5 V supply Single supply 3.3 V or 5 V AVDD1， 2 V to 5 V AVDD2， and 2 V to 5 V IOVDD Optional split supply AVDD1 and AVSS ± 2.5 V or AVDD1 and AVSS ± 1.65 V Current： 1.4 mA 3-/4-wire serial digital interface （Schmitt trigger on SCLK） CRC error checking SPI， QSPI， MICROWIRE， and DSP compatible Package： 40-lead 6 mm × 6 mm LFCSP Temperature range： ?40°C to +105°C