AD7176-2

24-Bit, 250 kSPS Sigma Delta ADC with 20 µs Settling
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Product Details

The AD7176-2 is a fast settling, highly accurate, high resolution, multiplexed Σ-Δ analog-to-digital converter (ADC) for low band-width input signals. Its inputs can be configured as two fully differential or four pseudo differential inputs via the integrated crosspoint multiplexer. An integrated precision, 2.5 V, low drift (2 ppm/°C), band gap internal reference (with an output reference buffer) adds functionality and reduces the external component count.

The maximum channel scan data rate is 50 kSPS/channel (settling time of 20 μs), resulting in fully settled data with 17 noise free bits. User-selectable output data rates range from 5 SPS to 250 kSPS. The resolution increases at lower speeds.

The AD7176-2 offers three key digital filters. The fast settling sinc5 + sinc1 filter maximizes the channel scan rate. The sinc3 filter maximizes the resolution for single-channel, low speed applications. For 50 Hz and 60 Hz environments, the AD7176-2 specific filter minimizes the settling times or maximizes the rejection of the line frequency. These enhanced filters enable simultaneous 50 Hz and 60 Hz rejection with a 27 SPS output data rate (with a settling time of 36 ms).

System offset and gain errors can be corrected on a per channel basis. This per channel configurability extends to the output data rate used for each channel when using a sinc5 + sinc1 filter. All switching of the crosspoint multiplexer is controlled by the ADC and can be configured to automatically control an external multiplexer via the GPIO pins. 

The specified operating temperature range is −40°C to +105°C. The AD7176-2 is housed in a 24-lead TSSOP package.

Applications
  • Process control:
    PLC/DCS modules
    Temperature and pressure measurement 
  • Medical and scientific multichannel instrumentation
  • Chromatography

Product Lifecycle

checked Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Alternative Parts

Evaluation Kits

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EVAL-AD7176-2 Circuit Diagram

Product Details

The EVAL-AD7176-2SDZ is a fully featured evaluation kit for the AD7176-2. This board operates in stand alone mode or in conjunction with the System Development Platform, EVAL-SDP-CB1Z . When operated with the System Development Platform software is provided enabling the user to perform detailed analysis of the ADC's performance. This software includes the technical note describing the operation and set up of the evaluation board in standalone operation or when operated with the System Development Platform . When operated in standalone mode the ADZS-BRKOUT-EX3 break out board is recommended for access to various control pins.


The SDP Controller board is a separate list item in the ordering guide below (EVAL-SDP-CB1Z). If you have not previously purchased an SDP Controller board, please do so to ensure a full evaluation setup.

Reference Designs

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Product Recommendations

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AD7176-2 Companion parts

Recommended Digital Isolators

  • For SPI Interface, enhanced system-level ESD performance, 2.5 kVrms isolation , we recommend the ADUM3401 .
  • For SPI Interface, low power, 5.0 kVrms isolation , we recommend the ADUM4401 .
  • For SPI Interface, lowest power, 2.5 kVrms isolation , we recommend the ADUM1401 .
  • For SPI Interface, smallest package, low voltage I/O (1.8 V to 5.5 V) , we recommend the ADUM3481 .

Recommended Driver Amplifiers

  • For a single supply, attenuating input stage, differential driver , we recommend the AD8475 .
  • For a single supply, low noise, low distortion, differential driver , we recommend the ADA4940-1 .
  • For a single supply, low noise, low offset CMOS amplifier , we recommend the AD8656 .

Recommended External Multiplexers

  • For low Ron with four differential inputs , we recommend the ADG1409 .
  • For low Ron, 4:1 channel multiplexer , we recommend the ADG1404 .

Recommended External Voltage References

  • For the family of low noise, low drift and high accuracy references , we recommend the ADR445 or the ADR4550 .

Recommended Power Solutions

  • For selecting voltage regulator products, use ADIsimPower.

Design Resources

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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.

AD7176-2 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints

Sample & Buy

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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.


Price Table Help

 
Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.