AD7173-8 Datasheet | Analog Devices

FEATURES 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 k SPS Channel scan data rate: 6.21 k SPS/channel (161 µs settling) Performance specifications 17.5 noise free bits at 31.25 k SPS 24 noise free bits at 1.25 SPS INL: ±3 ppm/FSR 85 d B rejection of 50 Hz and 60 Hz with 50 ms settling Operates with either 3.3 V or5 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 m A 3-/4-wire serial digital interface (Schmitt trigger on SCLK) CRC error checking SPI, QSPI, MICROWIRE, and DSP patible Package: 40-lead 6 mm × 6 mm LFCSP Temperature range: - 40°C to +105°C APPLICATIONS Process control: PLC/DCS modules Voltage, current, temperature, and pressure measurement Flow meters Medical and scientific multichannel instrumentation Seismic instrumentation Chemical analysis instrumentation: chromatography GENERAL DESCRIPTION Fast settling, highly accurate, low power, 8-/16-channel, multiplexed ADC for low bandwidth input signals with integrated input buffers. Integrated precision, 2.5 V, low drift (3.5 ppm/°C), band gap reference and integrated oscillator. Eight flexible setups with configurability for output data rate, digital filter mode, offset/gain error correction, reference selection, buffer enables and more. This per channel configurability extends to the output data rate used for each channel when using sinc5 + sinc1 filter. Sinc5 + sinc1 filter maximizes channel scan rate, and sinc3 filter maximizes resolution and enhanced 50 Hz/60 Hz rejection, with four selectable options to maximize...