The OPAx322x series consists of single, dual, and quad-channel CMOS operational amplifiers featuring low noise and rail-to-rail inputs and outputs optimized for low-power, single-supply applications. Specified over a wide supply range of 1.8 V to 5.5 V, the low quiescent current of only 1.5 mA per channel makes these devices well-suited for power-sensitive applications.
The combination of very low noise (8.5 nV√Hz at 1 kHz), high-gain bandwidth (20 MHz), and fast slew rate (10 V/µs) make the OPAx322x family ideal for a wide range of applications, including signal conditioning and sensor amplification requiring high gains. Featuring low THD+N, the OPAx322x series is also excellent for consumer audio applications, particularly for single-supply systems.
The OPAx322S models include a shutdown mode that allow the amplifiers to be switched from normal operation to a standby current that is typically less than 0.1 µA.
The OPA322 (single version) is available in 5-pin SOT-23 and 6-pin SOT-23, while the OPA2322 (dual version) is offered in 8-pin VSSOP, 10-pin VSSOP, 8-pin SOIC, and 8-pin SON packages. The quad version OPA4322 comes in 14-pin TSSOP and 16-pin TSSOP packages. All versions are specified for operation from –40°C to +125°C.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | OPAx322x 20-MHz, Low-Noise, 1.8-V, RRI/O, CMOS Operational Amplifier With Shutdown datasheet (Rev. F) | PDF | HTML | Dec 23, 2016 |
| Circuit design | Half-Wave Rectifier Circuit (Rev. B) | PDF | HTML | May 17, 2024 | |
| Circuit design | Photodiode Amplifier Circuit (Rev. B) | PDF | HTML | May 2, 2024 | |
| Application brief | Zero-crossover Amplifiers: Features and Benefits (Rev. B) | PDF | HTML | Nov 8, 2023 | |
| Circuit design | Single-supply, high-input voltage, full-wave rectifier circuit | PDF | HTML | Apr 13, 2021 | |
| Circuit design | Discrete Wide Bandwidth INA Circuit (Rev. A) | PDF | HTML | Dec 23, 2020 | |
| E-book | The Signal e-book: A compendium of blog posts on op amp design topics | PDF | HTML | Mar 28, 2017 | |
| E-book | Analog Engineer’s Pocket Reference Guide Fifth Edition (Rev. D) | PDF | HTML | Sep 30, 2014 | |
| Application note | OPA322, OPA2322, OPA4322 EMIR Immunity Performance | Nov 15, 2012 |
For additional terms or required resources, click any title below to view the detail page where available.
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOT-23 (DBV) | 6 | Ultra Librarian |
| SOT-23 (DBV) | 5 | Ultra Librarian |
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