AD7641

18-Bit, 2 MSPS SAR ADC

Data Sheet
Rev. A
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Datasheet
Data Sheet Rev. A

Alternative Parts

AD4003
AD4003

Lower power, Ease-of-Use features, Smaller package, and Reduced System Complexity

Overview

Features and Benefits

  • 18-bit resolution with no missing codes
  • 2.5 V internal low drift reference
    Throughput:
    2 MSPS (Warp mode)
    1.5 MSPS (Normal mode)
  • Differential input range: ± VREF
    (VREF up to 2.5 V)
  • INL: ±2 LSB typical
  • No pipeline delay (SAR architecture)
  • Parallel (18-, 16-, or 8-bit bus)
  • Serial 5 V/3.3 V/2.5 V interface
  • SPI®/QSPI™/MICROWIRE™/DSP compatible
  • On-board low drift reference with buffer and temperature sensor

Product Details

The AD7641 is a 18-bit, 2 MSPS, charge redistribution SAR, fully differential analog-to-digital converter that operates from a single 2.5 V power supply. The part contains a high-speed 18-bit sampling ADC, an internal conversion clock, an internal reference buffer, error correction circuits, and both serial and parallel system interface ports. It features a very high sampling rate mode (Warp) and a fast mode (Normal) for asynchronous conversion rate applications.

The AD7641 is hardware factory calibrated and comprehensively tested to ensure ac parameters such as signal-to-noise ratio (SNR) and total harmonic distortion (THD) in addition to the more traditional dc parameters of gain, offset and linearity.

Operation is specified from −40°C to +85°C.

Applications

  • Medical instruments
  • High dynamic data acquisition
  • Instrumentation
  • Spectrum analysis
  • ATE

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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 (1)

Documentation

Product Recommendations

AD7641 Companion Parts

Recommended Driver Amplifiers

Recommended External Voltage References

Reference Materials

Design Resources

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.

AD7641 Material Declaration
Quality And Reliability
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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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Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
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.