Analog Devices Inc. AD7190 24-Bit Sigma-Delta ADC

Analog Devices Inc. AD7190 24-Bit Sigma-Delta ADC is offered as a low-noise, complete analog front end designed for high-precision measurement applications. AD7190 includes a low-noise, 24-bit sigma-delta (∑-Δ) analog-to-digital converter (ADC). An on-chip, low-noise gain stage allows small amplitude signals to interface directly to the ADC. Designers can configure the device with two differential inputs or four pseudo-differential inputs. Analog Devices AD7190 ADC delivers an output data rate of 4.7Hz to 4.8kHz and provides two digital filter options. The AD7190 operates with a 5V analog power supply and a digital power supply from 2.7V to 5.25V. This device consumes a current of 6mA and is available in a 24-lead TSSOP package.


  • RMS noise: 8.5nV @ 4.7Hz (gain = 128)
  • 16 noise-free bits @ 2.4kHz (gain = 128)
  • Up to 22.5 noise-free bits (gain = 1)
  • Offset drift: 5nV/°C
  • Gain drift: 1ppm/°C
  • Specified drift over time
  • 2 differential/4 pseudo-differential input channels
  • Automatic channel sequencer
  • Programmable gain (1 to 128)
  • Output data rate: 4.7Hz to 4.8kHz
  • Internal or external clock
  • Simultaneous 50Hz/60Hz rejection
  • 4 general-purpose digital outputs
  • Power supply
    • AVDD: 4.75V to 5.25V
    • DVDD: 2.7V to 5.25V
  • Current: 6mA
  • Temperature range: –40°C to +105°C
  • Interface
    • 3-wire serial
    • SPI, QSPI™, MICROWIRE™, and DSP compatible
    • Schmitt trigger on SCLK
  • Qualified for automotive applications


  • Weigh scales
  • Strain gauge transducers
  • Pressure measurement
  • Temperature measurement
  • Chromatography
  • PLC/DCS analog input modules
  • Data acquisition
  • Medical and scientific instrumentation

Functional Block Diagram

Analog Devices Inc. AD7190 24-Bit Sigma-Delta ADC
Publicado: 2016-10-24 | Actualizado: 2022-03-11