Features and Benefits

  • 12-Bit ADC with Fast Conversion Time: 2 µs
  • Eight Single-Ended Analog Input Channels
  • Specified for VDD of 2.7 V to 5.5 V
  • Low Power Consumption
  • Fast Throughput Rate: - 188 kSPS
  • Sequencer Operatio
  • Automatic Cycle Mode
  • I2C® Compatible Serial Interface
  • I2C® Interface supports:
    Standard, Fast, and High-Speed Modes
  • Out of Range Indicator
  • Pin-Selectable Addressing via AS
  • Automatic Shutdown Mode: - 1 µA max

Product Details

The AD7998 is an 8 channel, 12-bit, high speed, low power, successive-approximation ADC. The part operates from a single 2.7 V to 5.5 V power supply and features a conversion time of 2 µs. The part contains an eight channel multiplexer and track/hold amplifier.

The AD7998 provides a two-wire serial interface, which is compatible with I2C interfaces. Each part comes in two versions, AD7998-0 and AD7998-1. Each version allows for a minimum of two different I2C addresses. The I2C interface on the AD7998-0 supports Standard and Fast I2C Interface Modes. The I2C Interface on the AD7998-1 supports Standard, Fast and two High-Speed I2C Interface Modes.

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)

Software & Systems Requirements

Product Recommendations

AD7998 Companion Parts

Recommended External References - 2.5V

Recommended Input Buffer Amplifiers

  • For precision, high speed, low cost: AD8604.
  • For single supply, high speed, low power: AD8031, AD8032.
  • For low distortion, low noise, dual supplies: AD8599.
  • For precision, low noise, single supply: AD8605, AD8605.

Recommended Digital Isolators

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.

PCN-PDN Information


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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.
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.