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Analog Devices Inc. AD4170 Low Noise Precision SigmaDelta ADC

Analog Devices Inc. AD4170 Low Noise Precision SigmaDelta ADC is designed for precision measurement applications, with a DC to 50kHz input bandwidth. The Analog Devices Inc. AD4170 features a 24-bit Σ-Δ ADC and supports output data rates from 7.6SPS to 500kSPS. Configurable for four differential or eight single-ended/pseudo differential inputs, it includes an on-chip low-noise gain stage for direct interfacing with small amplitude signals.

Features

  • Precision AC and DC performance
  • Noise RTI 5.5nV/√Hz (gain = 128)
  • ±0.5ppm of FSR INL
  • SNR 110dB typical (VREF = 4.096V, gain = 1 precharge, sinc5 filter)
  • -120dB typical THD
  • Crosspoint multiplexed analog inputs
  • Four differential/eight pseudo differential inputs
  • Overvoltage/undervoltage tolerant on inactive analog inputs
  • Channel scan data rate of 71.4kSPS/channel (14µs settling)
  • Ultra-low noise integrated PGA, gains of 0.5 to 128
  • 7.6SPS to 500kSPS output data rate
    • Flexible digital filters
    • ±0.005dB maximum pass-band ripple low ripple FIR
    • User-programmable FIR filter options
    • Low latency sinc filters
    • Simultaneous 50Hz/60Hz rejection
  • Band gap reference with 5ppm/°C drift typical
  • Internal oscillator and temperature sensor
  • 4.75V to 5.25V or ±2.5V analog power supply
  • 1.7V to 5.25V digital power supply
  • Matched programmable excitation current sources
  • Low-side power switches
  • AC excitation
  • On-chip bias voltage generator
  • Four general-purpose inputs/outputs
  • Internal and system calibration
  • Sensor burnout detection
  • Diagnostic functions
  • Per channel configuration
  • Flexible channel sequencer
  • 3- or 4-wire serial interface
    • Schmitt trigger on SCLK
    • SPI, QSPI, MICROWIRE, and DSP compatible
  • TDM-compatible interface for data streaming
  • -40°C to +105°C performance temperature range
  • -40°C to +125°C functional temperature range
  • 32-lead 4mm × 6mm LFCSP package

Applications

  • Industrial process control: PLC/DCS modules
  • Temperature and pressure measurement
  • High-accuracy medical and scientific instrumentation
  • Chromatography
  • Seismic and energy exploration
  • Electrical test and measurement
  • Acoustic analysis
  • Instrumentation
  • Weigh scales

BLOCK DIAGRAM

Block Diagram - Analog Devices Inc. AD4170 Low Noise Precision SigmaDelta ADC
Inilathala: 2024-12-05 | Na-update: 2024-12-09