Features and Benefits

  • 2-Channel, 24-Bit Σ-Δ ADC
    Pin Configurable (No Programmable Registers) 
    Pin Selectable Input Channels 
    Pin Programmable Input Ranges (±2.56 V or ±160 mV)
  • Fixed 19.79 Hz Update Rate
  • Simultaneous 50 Hz and 60 Hz Rejection
  • 24-Bit No Missing Codes
  • 18.5-Bit p-p Resolution (±2.56 V Range)
  • On-Chip Functions Rail-Rail Input Buffer and PGA
  • 16.5-Bit p-p Resolution (±160 mV Range)
  • Interface
    Master or Slave Mode of Operation 
    Slave Mode: 
    3-Wire Serial 
    SPI®, QSPI, MICROWIRE, and DSP-Compatible 
    Schmitt Trigger on SCLK
  • Power
    Specified for Single 3 V and 5 V Operation 
    Normal: 1.3 mA @ 3 V 
    Power-Down: 9 µA

Product Details

The AD7782 and AD7783 are 24-bit low cost, low power Sigma Delta ADCs intended for dc and low frequency ac measurement applications. They are Read-only ADCs and have no writeable registers. This leads to a very simple interface between ADC and controller. Since their power consumption is low, the devices can be loop powered, battery powered or locally powered. The two-setting on-chip PGA can accommodate either a low-level or high-level analog input with no external signal conditioning hardware. Operating options are pin-programmable, not software programmable.

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations

Design Tools

Sigma-Delta ADC Tutorial

An interactive illustration showing the behavior of an idealized sigma-delta A/D converter.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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