Design tool
OPA322
Single, 5.5-V, 20-MHz, 65-mA output current, low noise (8.5-nV/√Hz) operational amplifier
Data sheet
OPA322
- Gain Bandwidth: 20 MHz
- Low Noise: 8.5 nV√Hz at 1 kHz
- Slew Rate: 10 V/µs
- Low THD+N: 0.0005%
- Rail-to-Rail I/O
- Offset Voltage: 2 mV (maximum)
- Supply Voltage: 1.8 V to 5.5 V
- Supply Current: 1.5 mA/ch
- Shutdown: 0.1 µA/ch
- Unity-Gain Stable
- Small Packages:
- SOT-23, SON, VSSOP, TSSOP
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.
Technical documentation
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View all 9 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | OPAx322x 20-MHz, Low-Noise, 1.8-V, RRI/O, CMOS Operational Amplifier With Shutdown datasheet (Rev. F) | PDF | HTML | 23 Dec 2016 |
| Application note | Zero-crossover Amplifiers: Features and Benefits (Rev. B) | PDF | HTML | 08 Nov 2023 | |
| Circuit design | Single-supply, high-input voltage, full-wave rectifier circuit | PDF | HTML | 13 Apr 2021 | |
| Circuit design | Discrete Wide Bandwidth INA Circuit (Rev. A) | PDF | HTML | 23 Dec 2020 | |
| Circuit design | Photodiode amplifier circuit (Rev. A) | PDF | HTML | 04 Feb 2019 | |
| Circuit design | Half-wave rectifier circuit (Rev. A) | 01 Feb 2019 | ||
| E-book | Analog Engineer’s Pocket Reference Guide Fifth Edition (Rev. C) | 30 Nov 2018 | ||
| E-book | The Signal e-book: A compendium of blog posts on op amp design topics | 28 Mar 2017 | ||
| Application note | OPA322, OPA2322, OPA4322 EMIR Immunity Performance | 15 Nov 2012 |
Design & development
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Supported products & hardware
Products
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Hardware development
Design tool
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| Package | Pins | Download |
|---|---|---|
| SOT-23 (DBV) | 6 | View options |
| SOT-23 (DBV) | 5 | View options |
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