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AD7171:  16-Bit Low Power Σ−Δ ADC

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.

FEATURES and BENEFITS

  • Output data rate: 125 Hz
  • RMS Noise: 6.9 μV
  • Pin-Programmable powerdown and reset
  • Status Function
  • Internal clock oscillator
  • Current: 110 μA
  • Power supply: 2.7 V to 5.25 V
  • –40°C to +105°C temperature range
  • 3 mm x 3 mm LFCSP package

Functional Block Diagram for AD7171

Functional Block Diagram for AD7171
Functional Block Diagram for AD7171

Documentation

Title Content Type File Type
AD7171: 16-Bit Low Power Sigma-Delta ADC Data Sheet (Rev A, 04/2013) (pdf, 278 kB) Data Sheets PDF
CN-0218: 500 V Common-Mode Voltage Current Monitor  (pdf, 161 kB) Circuit Note PDF
CN-0188: Isolated Low Side Current Monitor for Negative High Voltage Rails  (pdf, 129 kB) Circuit Note PDF
UG-081: Evaluation Board for the AD7171 16-Bit, Low Power Sigma-Delta ADC  (pdf, 544 kB) User Guides PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
Industrial ICs
Industrial ICs Solutions Bulletin, Volume 10, Issue 8
Solutions Bulletins HTML
Glossary of EE Terms Glossary HTML

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Companion Products

Suggested Companion Products


Recommended Driver Amplifier for the AD7171

  • 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 the AD7171
  • For low noise, low cost, low power, we recommend the ADR381 or the ADR391.
  • For lowest noise and higher accuracy, we recommend the ADR421 or the ADR431.
Recommended Precision (5V) Reference for the AD7171
  • For low noise, low cost, low power, we recommend the ADR395.
  • For lowest noise and higher accuracy, we recommend the ADR425.
Recommended Digital Isolators for the AD7171
  • For a low cost standard digital isolator, we recommend the ADuM1201 or the ADuM1301.
  • For a digital isolator with isoPower, we recommend the ADuM5241.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

Price Table Help

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.

AD7171 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-AD7171EBZ Status: Production Evaluation Board $59.00 Yes -

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.

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