AD7171

16-Bit Low Power Σ−Δ ADC
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Product Details

The AD7171 is a very low power 16-bit analog-to-digital converter (ADC). It contains a precision 16-bit Σ-Δ ADC and an on-chip oscillator. Consuming only 110 μA, the AD7171 is particularly suitable for portable or battery operated products where very low power is a requirement. The AD7171 also has a power down mode in which the device consumes 5 μA, thus increasing the battery life of the product.

For ease-of-use, all the features of the AD7171 are controlled by dedicated pins. Each time a data read occurs, 8 status bits are appended to the 16-bit conversion. These status bits contain a pattern sequence that can be used to confirm the validity of the serial transfer.

The output data rate of the AD7171 is 125 Hz while the settling time is 24 ms. The AD7171 has one differential input and has a gain of 1. This is useful in applications where the user needs to use an external amplifier to implement system-specific filtering or gain requirements.

The AD7171 operates with a power supply from 2.7 V to 5.25 V. It is available in a 10-lead LFCSP package.

Product Lifecycle

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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.

Evaluation Kits

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Product Details

The EVAL-AD7171EBZ is a fully featured evaluation Board for the AD7171. The evaluation board can be connected to a PC via a standard USB interface. Software is provided enabling the user to perform detailed analysis of the ADC's performance.

Reference Designs

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CN0218 Circuit Diagram

CN0218 Photo

CN0188 Circuit Diagram

CN0188 Photo

Product Recommendations

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AD7171 Companion parts

Recommended Digital Isolators

  • For a digital isolator with isoPower , we recommend the ADUM5241 .
  • For a low cost standard digital isolator , we recommend the ADUM1201 or the ADUM1301 .

Recommended Driver Amplifier

  • For a low noise, low distortion, rail-to-rail output, differential driver , we recommend the ADA4940-1 .
  • For a precision, general purpose, rail-to-rail, single-ended input , we recommend the AD8628 .

Recommended Precision (2.5V) Reference

  • For lowest noise and higher accuracy , we recommend the ADR421 or the ADR431 .
  • For low noise, low cost, low power , we recommend the ADR381 or the ADR391 .

Recommended Precision (5V) Reference

  • For lowest noise and higher accuracy , we recommend the ADR425 .
  • For low noise, low cost, low power , we recommend the ADR395 .

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.

AD7171 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints

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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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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.