Analog Devices AD7173-8 Product Info

• 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

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 rejection.

Integrated diagnostic features, including CRC, register checksum, temperature sensor, crosspoint multiplexer, burnout currents, and GPIOs/GPOs.

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