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

The AD7322* is a 2-channel, 12-bit plus sign, successive approximation 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 ...More

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

Product Description

The AD7322* is a 2-channel, 12-bit plus sign, successive approximation 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.

*Protected by U.S. Patent No. 6,731,232.


Product Highlights

  1. The AD7322 can accept true bipolar analog input signals, ±10 V, ±5 V, ±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, 30 mW maximum, at 1 MSPS throughput rate
  5. Channel sequencer

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EVALUATION BOARDS & DEVELOPMENT KITS

  • 12-Bit Plus Sign SAR ADC
  • True Bipolar Analog Inputs
  • Software Selectable Input Ranges
    ± 10V, ± 5V, ± 2.5V, 0 to 10V
  • Two Analog Inputs with Channel Sequencer
  • Single Ended, True Differential and Pseudo Differential Capability.
  • High Analog Input Impedance
  • Low Power: 26 mW
  • Full Power Signal Bandwidth: >13 MHz
  • Internal 2.5 V Reference
  • High Speed Serial Interface - 1 MSPS Throughput
  • For 8- and 4-channel equivalent devices, see AD7328 and AD7324 respectively
  • Resolution (Bits): 13bit
  • T-Put Rate: 1MSPS
  • # Chan: 2
  • Supply V: Multi(±12, +5),Multi(±15, +5)
  • Pwr Diss: 30mW
  • Interface: Ser,SPI
  • Ain Range: Bip (Vref),Bip (Vref) x 2,Bip (Vref) x 4,Bip 10V,Bip 2.5V,Bip 5.0V,Uni (Vref) x 4,Uni 10V
  • SNR (dB): 76dB
  • Pkg Type: SOP

Functional Block Diagram for AD7322

Similar Products

arrow View Full Interactive Product Selection Table
Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
AD7322 13 1MSPS 2 30mW
AD7912 10 1MSPS 2 15mW
AD7324 13 1MSPS 4 30mW
AD7922 12 1MSPS 2 15mW
AD7328 13 1MSPS 8 29mW
AD7329 13 1MSPS 8 30mW
AD7321 13 500KSPS 2 17mW
AD7477 10 1MSPS 1 17.5mW
AD7477A 10 1MSPS 1 17.5mW
AD7475 12 1MSPS 1 10.5mW
AD7476 12 1MSPS 1 17.5mW
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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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*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.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.