Features and Benefits

  • Specified for VDD of 3 V and 5 V
  • Low power at max throughput rate
    3.3 mW max at 555 kSPS with 3 V supplies
    7.25 mW max at 555 kSPS with 5 V supplies
  • Fully differential analog input
  • Wide input bandwidth
    70 dB SINAD at 100 kHz input frequency
  • See datasheet for additional features

Product Details

The AD74521 is a 12-bit, high speed, low power, successive-approximation (SAR) analog-to-digital converter that features a fully differential analog input. This part operates from a single 3 V or 5 V power supply and features throughput rates up to 555 kSPS.

The part contains a low noise, wide bandwidth, differential track-and-hold amplifier (T/H) that can handle input frequencies up to 3.5 MHz. The reference voltage is applied externally to the VREF pin and can be varied from 100 mV to 3.5 V depending on the power supply and what suits the application. The value of the reference voltage determines the common mode voltage range of the part. With this truly differential input structure and variable reference input, the user can select a variety of input ranges and bias points.

The conversion process and data acquisition are controlled using CS and the serial clock allowing the device to interface with Microprocessors or DSPs. The input signals are sampled on the falling edge of CS and the conversion is also initiated at this point.

The SAR architecture of this part ensures that there are no pipeline delays.

The AD7452 uses advanced design techniques to achieve very low power dissipation.


  1. Operation with Either 3 V or 5 V Power Supplies.
  2. High Throughput with Low Power Consumption. With a 3 V supply, the AD7452 offers 3.3 mW max power consumption for 555 kSPS throughput.
  3. Fully Differential Analog Input.
  4. Flexible Power/Serial Clock Speed Management. The conversion rate is determined by the serial clock, allowing the power to be reduced as the conversion time is reduced through the serial clock speed increase. This part also features a shutdown mode to maximize power efficiency at lower throughput rates.
  5. Variable Voltage Reference Input.
  6. No Pipeline Delay.
  7. Accurate Control of the Sampling Instant via a CS Input and Once-Off Conversion Control.
  8. ENOB > 8 Bits Typically with 100 mV Reference.

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.

Product Recommendations

AD7452 Companion Parts

Recommended Precision Voltage References

Recommended Driver Amplifiers

  • For ultra low distortion, low power differential amplifier: ADA4940-1.
  • For low noise, low cost, precision amplifier: AD8655, AD8656.

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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