Features and Benefits

  • Fast throughput rate of 1 MSPS
  • Specified for VDD of 2.7 V to 5.25 V
  • Logic voltage VDRIVE of 1.65 V to 5.25 V
  • INL of ±1 LSB maximum
  • Analog input range of 0 V to VREF
  • Ultralow power
    • 349 µA typical at 3 V and 1 MSPS
    • 264 nA typical at 3 V in power-down mode
  • Internal 2.5 V reference, ±4.5 ppm/°C typical drift
  • Wide input bandwidth
  • Flexible power/throughput rate management
  • High speed serial interface
    • SPI®/QSPI™/MICROWIRE™/DSP compatible
  • BUSY indicator
  • Power-down mode
  • 10-lead, 3 mm × 2 mm LFCSP and 10-lead MSOP packages
  • Temperature range of −40°C to +125°C

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). 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, accurate reference, and high speed serial interface.

The conversion process and data acquisition are controlled using a CONVST signal and an internal oscillator. The AD7091R has a serial interface that allows data to be read after the conversion while achieving a 1 MSPS throughput rate.

The AD7091R uses advanced design and process techniques to achieve very low power dissipation at high throughput rates. An on-chip, accurate 2.5 V reference is available

Product Highlights

  1. Lowest Power 12-Bit SAR ADC Available.
  2. On-Chip, Accurate 2.5 V Reference.
  3. High Throughput Rate with Ultralow Power Consumption.
  4. Flexible Power/Throughput Rate Management. Average power scales with the throughput rate. Power-down mode allows the average power consumption to be reduced when the device is not performing a conversion.
  5. Single Supply Operation with VDRIVE Function. The AD7091R operates from a single 2.7 V to 5.25 V supply. The VDRIVE function allows the serial interface to connect directly to 1.8 V to 3.3 V processors.


  • Battery-powered systems
    – Handheld meters
    – Medical instruments
    – Mobile communications
  • Instrumentation and control systems
  • Data acquisition systems
  • Optical sensors
  • Diagnostic/monitoring functions
  • Energy harvesting

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 (1)

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    Reference Designs (8)

    Product Recommendations

    AD7091R Companion Parts

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    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.

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