Data Sheet
Low Power, 8-/16-Channel, 31.25 kSPS, 24-Bit, Highly Integrated Sigma-Delta ADC
AD7173-8
FEATURES
Low power...
Data Sheet
Low Power, 8-/16-Channel, 31.25 kSPS, 24-Bit, Highly Integrated Sigma-Delta ADC
AD7173-8
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 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 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 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
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 bandwi...
