16-Bit, Low Power, Sigma-Delta ADC

Manufactured by:

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 135 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, dedicated pins control all of the features of the AD7171. Each time a data read occurs, eight 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, whereas the settling time is 24 ms. The AD7171 has one differential input and 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.

The AD7170 is a 12-bit version of the AD7171. It has the same feature set as the AD7171 and is pin-for-pin compatible.


  • Weigh scales
  • Pressure measurement
  • Industrial process control
  • Portable instrumentation

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.

Evaluation Kits


X +


EVAL-AD7171 Circuit Diagram

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.

Please note: This Evaluation software does not run on Windows 8 or Windows 10 (USB driver is non-compliant with OS >Windows 7).

Reference Designs


X +


CN0218 Circuit Diagram

CN0218 Photo


CN0188 Circuit Diagram

CN0188 Photo

Product Recommendations

X +
AD7171 Companion Parts

Recommended Digital Isolators

Recommended Driver Amplifier

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

Recommended Precision (2.5V) Reference

Recommended Precision (5V) Reference

  • For lowest noise and higher accuracy: ADR425.
  • For low noise, low cost, low power: ADR395.

Design Resources

X +

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



AD7171 Discussions

Didn't find what you were looking for? Ask the Analog community »

Sample & Buy

Check Inventory

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.