1 MSPS, Ultralow Power, 12-Bit ADC in 10-Lead LFCSP and MSOP

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Product Details

The AD7091R is a 12-bit successive approximation analog-to-digital converter (ADC) that offers ultralow power consumption (typically 349 µA at 3 V and
1 MSPS) while achieving fast throughput rates (1 MSPS with a 50 MHz SCLK). The AD7091R uses advanced design and process techniques to achieve this very low power dissipation at high throughput rates. The part also features an on-chip, accurate 2.5 V reference.

Operating from a single 2.7 V to 5.25 V power supply, the part contains a wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 7 MHz. The AD7091R also features an on-chip conversion clock and high speed serial interface. The conversion process and data acquisition are controlled using a CONVST signal and an internal oscillator.

Product Highlights

Low Power:
  • Lowest Power 12-Bit SAR ADC Available
    • 349 μA typical at 3 V and 1 MSPS
    • 264 nA typical at 3 V in power-down mode
  • Flexible Power/Throughput Rate Management
    • Average power scales with the throughput rate
    • Power-down mode allows the average power consumption to be reduced for intermittent or one shot conversion scenarios
  • ±1 LSB max INL

  • Single supply operation with separate VDRIVE pin. The AD7091R operates from a single 2.7 V to 5.25 V supply. The VDRIVE function allows the serial SPI® interface to independently connect directly to 1.8 V to 5 V processors
  • On-chip, accurate 2.5 V reference, which can also be overdriven with external 2.7 V to 5.25 V reference
  • Temperature range from −40°C to +125°C spans numerous end markets

Small Package:

  • Available in 2 mm x 3 mm 10-lead LFCSP, with alternative pinned MSOP package


Instrumentation and Measurement

  • Battery and USB powered systems
    • Data acquisition systems
    • Handheld meters
  • Field instruments
  • Battery powered devices
  • Optical systems
  • Mobile communications
  • Battery Operated Medical instruments
    • Electrocardiograms and heart rate monitors

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.

Evaluation Kits


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Product Details

The EVAL-AD7091RSDZ is a fully featured evaluation kit for the AD7091R. 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.


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Tools & Simulations

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Reference Designs


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Product Recommendations

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AD7091R Companion Parts

Recommended Driver Amplifiers

Recommended External References

  • For a 3V, low power, low noise , we recommend the ADR4530 or the REF193 .
  • For a 5V, low power, low noise , we recommend the ADR4550 or the REF195 .

Reference Materials

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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.

AD7091R 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.