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AD7322:  Software Selectable True Bipolar Input, 2-Channel, 12-Bit Plus Sign ADC

Product Details

The AD7322 is a 2-channel, 12-bit plus sign, successive approximation analog-to-digital converter (ADC) designed on the iCMOS™ (industrial CMOS) process. iCMOS is a process combining high voltage silicon with submicron CMOS and complementary bipolar technologies. It enables the development of a wide range of high performance analog ICs capable of 33 V operation in a footprint that no previous generation of high voltage parts could achieve. Unlike analog ICs using conventional CMOS processes, iCMOS components can accept bipolar input signals while providing increased performance, dramatically reduced power consumption, and reduced package size.

The AD7322 can accept true bipolar analog input signals. The AD7322 has four software-selectable input ranges, ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V. Each analog input channel can be independently programmed to one of the four input ranges. The analog input channels on the AD7322 can be programmed to be single-ended, true differential, or pseudo differential.

The ADC contains a 2.5 V internal reference. The AD7322 also allows for external reference operation. If a 3 V reference is applied to the REFIN/OUT pin, the AD7322 can accept a true bipolar ±12 V analog input. Minimum ±12 V VDD and VSS supplies are required for the ±12 V input range. The ADC has a high speed serial interface that can operate at throughput rates up to 1 MSPS.

Product Highlights

  1. The AD7322 can accept true bipolar analog input signals, ±10 V, ±5 V, and ±2.5 V, and 0 V to +10 V unipolar signals.
  2. The two analog inputs can be configured as two single-ended inputs, one true differential input, or one pseudo differential input.
  3. 1 MSPS serial interface. SPI-/QSPI™-/DSP-/MICROWIRE™-compatible interface.
  4. Low power, 31 mW maximum, at 1 MSPS throughput rate.
  5. Channel sequencer.


  • 12-bit plus sign SAR ADC
  • True bipolar input ranges
  • Software-selectable input ranges ±10 V, ±5 V, ±2.5 V, 0 V to +10 V
  • 1 MSPS throughput rate
  • Two analog input channels with channel sequencer
  • Single-ended, true differential, and pseudo differential analog input capability
  • High analog input impedance
  • Low power: 21 mW
  • Full power signal bandwidth: 22 MHz
  • Internal 2.5 V reference
  • High speed serial interface
  • Power-down modes
  • 14-lead TSSOP package
  • iCMOS process technology

AD7322 Functional Block Diagram

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Evaluation Kits & Symbols & Footprints

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Product Recommendations & Reference Designs

Companion Products

Suggested Companion Products

Recommended Input Buffer Amplifiers for the AD7322

  • For low noise and low frequency at high supply voltages( up to +-18V), we suggest the AD8597, ADA4627-1 or the dual AD8599.
  • For low noise and low frequency applications at medium supply voltages( up to +-13V), we suggest the AD8610 or the dual AD8620.
Recommended External References for the AD7322
  • For a precision 3.0V reference, we recommend AD780 or the REF193.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7322 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD7322BRUZ Status: Production 14 ld TSSOP 14 Ind Tube, 96 $5.66 $4.81 Y  Material Info PCN Purchase Sample
AD7322BRUZ-REEL Status: Last Time Buy 14 ld TSSOP 14 Ind Reel, 2500 - $4.81 Y  Material Info PCN/PDN Purchase
AD7322BRUZ-REEL7 Status: Production 14 ld TSSOP 14 Ind Reel, 1000 - $4.81 Y  Material Info PCN Purchase
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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