Alternative Parts


Features and Benefits

  • 12 bit SAR ADC
    8 single-ended inputs
    Channel sequencer functionality
    Fast throughput of 1Msps
    Analog Input Range 0 to 2.5V
  • 12-bit temperature-to-digital converter
  • Temperature sensor accuracy of ±1°C
  • Temperature range: −40°C to +125°C
  • Specified for VDD of 2.8 V to 3.6V
  • Logic Voltage VDRIVE = 1.65V to 3.6V
  • Power-down current : <10 μA
  • Internal 2.5V Reference
  • Internal Power on Reset
  • High speed serial interface SPI
  • 20-lead LFCSP

Product Details

The AD7298 is a 12-bit, high speed, low power, 8-channel, successive approximation ADC with an internal temperature sensor. The part operates from a single 3.3 V power supply and features throughput rates up to 1 MSPS. The device contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 30 MHz.

The AD7298 offers a programmable sequencer, which enables the selection of a pre-programmable sequence of channels for conversion. The device has an on-chip 2.5 V reference that can be disabled to allow the use of an external reference.

The AD7298 includes a high accuracy band gap temperature sensor, which is monitored and digitized by the 12-bit ADC to give a resolution of 0.25°C. The device offers a 4-wire serial interface compatible with SPI and DSP interface standards.

The AD7298 uses advanced design techniques to achieve very low power dissipation at high throughput rates. The part also offers flexible power/throughput rate management options. The part is offered in a 20-lead LFCSP package.


  1. Ideally suited to monitoring system variables in a variety of systems including telecommunications, process and industrial control.
  2. High Throughput rate of 1Msps per channel with Low Power Consumption.
  3. Eight Single-Ended Inputs with a Channel Sequencer. A consecutive sequence of channels can be selected on which the ADC cycles and converts.
  4. Integrated temperature sensor with 0.25°C resolution.

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)

Tools & Simulations

IBIS Models

Product Recommendations

AD7298 Companion Parts

Recommended Driver Amplifiers

Recommended External Voltage References - 2.5V

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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Evaluation Boards

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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.