AD7782:  2-Channel, Read-Only, Pin-Configured, 24-bit Sigma-Delta ADC

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 ...More

AD7782:  2-Channel, Read-Only, Pin-Configured, 24-bit Sigma-Delta ADC

Product Description

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.

Features

  • 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

Diagrams

AD7782 Diagram
Functional Block Diagram for AD7782

Specifications

Resolution (Bits) 24bit
T-Put Rate 19.79SPS
# Chan 2
Supply V Single(+3),Single(+5)
Pwr Diss (max) 8.5mW
Interface Ser,SPI
Ain Range 0.32 V p-p,5.12 V p-p
SNR (dB) n/a
Pkg Type SOP

AD7949 - 14-Bit, 8-Channel, 250 kSPS PulSAR® ADC

AD7682 - 16-Bit, 4-Channel, 250 kSPS PulSAR® ADC

AD7262 - True Differential, Dual, 1 MSPS, 14-Bit/12-Bit, 2-Channel SAR ADC With PGA

EVAL-CED - Converter Evaluation and Development (CED) Board

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Part# Res Throughput Rate # of Inputs Operating Pwr Diss
AD7746 24 90SPS 2 4.25mW
AD7782 24 19.79SPS 2 8.5mW
AD7787 24 120SPS 2 800µW
AD7793 24 470SPS 3 2.5mW
AD7791 24 120SPS 1 800µW
AD7713 24 205SPS 3 5.5mW
AD7745 24 90SPS 1 4.25mW
AD7783 24 19.79SPS 1 8.5mW
AD7797 24 123SPS 1 1.6mW
AD7799 24 470SPS 3 2.5mW
AD7714 24 1KSPS 5 7mW
Pricing, Packaging & Availability

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Status
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  • Pre-Release: The model has not been released to general production, but samples may be available.
  • Production: The model is currently being produced, and generally available for purchase and sampling.
  • Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
  • Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
Package Description
The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
Price
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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RoHS Compliant
Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

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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