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AD7453:  Pseudo Differential, 555 kSPS, 12-Bit A/D Converter in 8-Lead SOT-23

Product Details

The AD7453 is a 12-bit, low-power, successive-approximation (SAR) analog-to-digital converters that features a pseudo differential analog input. This part operates from a single 2.7 V to 5.25 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) which can handle input frequencies in excess of 1 MHz with the -3 dB point being 20 MHz typically. 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 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 AD7453 uses advanced design techniques to achieve very low power dissipation at high throughput rates.


  • Low Power at max Throughput Rate:
    - 7 mW typ at 555 kSPS with 5 V Supplies
    - 3 mW typ at 555 kSPS with 3 V Supplies
  • Wide Input Bandwidth:
    - 70 dB SINAD at 100 kHz Input Frequency
  • Flexible Power/Serial Clock Speed Management
  • Specified for VDD of 2.7 V to 5.25 V
  • Pseudo Differential Analog Input
  • No Pipeline Delays
  • High Speed Serial Interface SPI®/QSPI™/MICROWIRE™/DSP Compatible
  • Power-Down Mode: 1 µA max
  • 8 Pin SOT-23 Package

Functional Block Diagram for AD7453

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Title Content Type File Type
AD7453: Pseudo Differential, 555kSPS, 12-Bit ADC in 8-Lead SOT-23 Data Sheet  (Rev B, 02/2004) (pdf, 524 kB) Data Sheets PDF
CN-0100: Measuring −48 V High-Side Current Using the AD629 Difference Amplifier, AD8603 Op Amp, AD780 Reference, and AD7453 12-Bit ADC Single-Supply Components  (pdf, 108 kB) Circuit Note PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
8- to 18-Bit SAR ADCs ... From the Leader in High Performance Analog  (pdf, 1885 kB)
8- to 18-Bit SAR ADCs with Sample Rates up to 3 MSPS -- The latest additions to ADI’s ADC portfolio offer unrivaled functionality in terms of channel count and power supply voltage, optimal power/speed ratios, and the smallest packages to meet the demands of any data acquisition application, including portable, industrial, medical, wireless, and communications.
Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

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Companion Products

Suggested Companion Products

Recommended Driver Amplifiers for the AD7453

  • For low noise, low distortion, we recommend the ADA4940-1 differential amplifier.
Recommended Voltage References for the AD7453
  • For low noise, high accuracy, we recommend the ADR421 or the AD780, 2.5V reference.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7453 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD7453ARTZ-REEL7 Status: Last Time Buy 8 ld SOT-23 8 Ind Reel, 3000 - $2.39 Y  Material Info PCN/PDN Purchase
AD7453BRTZ-REEL7 Status: Production 8 ld SOT-23 8 Ind Reel, 3000 - $2.99 Y  Material Info PCN Purchase Sample
Price Table Help

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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