OPAx322x 20-MHz, Low-Noise, 1.8-V, RRI/O, CMOS Operational Amplifier With Shutdown
1 Features
2 Applications
- Sensor Signal Conditioning
- Consumer Audio
- Multi-Pole Active Filters
- Control-Loop Amplifiers
- Communications
- Security
- Scanners
Zero-Crossover Rail-to-Rail Input Stage Eliminates Distortion
3 Description
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.
Device Information(1)
- For all available packages, see the orderable addendum at the end of the data sheet.
4 Revision History
Changes from E Revision (June 2012) to F Revision
- Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information sectionGo
- Changed device package descriptions to current standards Go
- Deleted Package/Ordering Information table; see Package Option Addendum at the end of this data sheetGo
Changes from D Revision (March 2012) to E Revision
- Changed product status from Production Data to Mixed StatusGo
- Updated D and DGK pinout drawingGo
- Added Figure 26 to Figure 29Go
- Added Shutdown Function sectionGo
Changes from C Revision (November 2011) to D Revision
- Changed product status from Mixed Status to Production DataGo
- Added OPA4322, OPA4322S to the Input Bias Current, Input bias current, Over temperature parameter in Electrical Characteristics tableGo
- Changed Power Supply, OPA4322, OPA4322S Over temperature parameter maximum specification in the Electrical Characteristics tableGo
Changes from B Revision (July 2011) to C Revision
- Changed status of OPA2322 SO-8 (D) to production data from product previewGo
Changes from A Revision (May 2011) to B Revision
- Added OPA322S thermal information to OPA322 Thermal Information tableGo
- Added OPA2322S thermal information to OPA2322 Thermal Information tableGo
- Added OPA4322S thermal information to OPA4322 Thermal Information tableGo
- Changed Input Bias Current Input bias current, Over temperature parameter in Electrical Characteristics tableGo
- Changed Open-Loop Gain, Open-loop voltage gain parameter typical specification in the Electrical Characteristics tableGo
- Changed Open-Loop Gain, Phase margin parameter test conditions in the Electrical Characteristics tableGo
- Changed Power Supply, Quiescent current per amplifier OPA322/S parameter maximum specification in the Electrical CharacteristicsGo
- Changed Power Supply, OPA322 Over temperature parameter maximum specification in the Electrical Characteristics tableGo
- Changed Power Supply, Quiescent current per amplifier OPA4322/S parameter typical specification in the Electrical CharacteristicsGo
- Added test conditions to Power Supply section in Electrical Characteristics tableGo
- Changed Shutdown, Quiescent current, per amplifier parameter maximum specification in Electrical Characteristics tableGo
- Updated Figure 1Go
- Added Figure 25Go
- Changed Overload Recovery Time sectionGo
Changes from * Revision (January 2011) to A Revision
- Changed document status to Production Data Go
5 Pin Configuration and Functions
Pin Functions: OPA322, OPA322S
| PIN | I/O | DESCRIPTION | ||
|---|---|---|---|---|
| NAME | OPA322 | OPA322S | ||
| SOT-23 | SOT-23 | |||
| –IN | 4 | 4 | I | Inverting input |
| +IN | 3 | 3 | I | Noninverting input |
| OUT | 1 | 1 | O | Output |
| SHDN | — | 5 | I | Shutdown control (active low) |
| V– | 2 | 2 | — | Negative (lowest) power supply |
| V+ | 5 | 6 | — | Positive (highest) power supply |
Pin Functions: OPA2322, OPA2322S
| PIN | I/O | DESCRIPTION | |||
|---|---|---|---|---|---|
| NAME | OPA2322 | OPA2322S | |||
| SOIC, VSSOP |
SON | VSSOP | |||
| –IN A | 2 | 2 | 2 | I | Inverting input, channel A |
| +IN A | 3 | 3 | 3 | I | Noninverting input, channel A |
| –IN B | 6 | 6 | 8 | I | Inverting input, channel B |
| +IN B | 5 | 5 | 7 | I | Noninverting input, channel B |
| OUT A | 1 | 1 | — | O | Output, channel A |
| OUT B | 7 | 7 | — | O | Output, channel B |
| SHDN A | — | — | 5 | I | Shutdown control, channel A (active low) |
| SHDN B | — | — | 6 | I | Shutdown control, channel B (active low) |
| V– | 4 | 4 | 4 | — | Negative (lowest) power supply |
| V+ | 8 | 8 | 10 | — | Positive (highest) power supply |
| VOUT A | — | — | 1 | O | Output, channel A |
| VOUT B | — | — | 9 | O | Output, channel B |
Pin Functions: OPA4322, OPA4322S
| PIN | I/O | DESCRIPTION | ||
|---|---|---|---|---|
| NAME | OPA4322 | OPA4322S | ||
| TSSOP | TSSOP | |||
| –IN A | 2 | 2 | I | Inverting input, channel A |
| +IN A | 3 | 3 | I | Noninverting input, channel A |
| –IN B | 6 | 6 | I | Inverting input, channel B |
| +IN B | 5 | 5 | I | Noninverting input, channel B |
| –IN C | 9 | 11 | I | Inverting input, channel C |
| +IN C | 10 | 12 | I | Noninverting input, channel C |
| –IN D | 13 | 15 | I | Inverting input, channel D |
| +IN D | 12 | 14 | I | Noninverting input, channel D |
| OUT A | 1 | 1 | O | Output, channel A |
| OUT B | 7 | 7 | O | Output, channel B |
| OUT C | 8 | 10 | O | Output, channel C |
| OUT D | 14 | 16 | O | Output, channel D |
| SHDN A/B | — | 8 | I | Shutdown control, channels A and B (active low) |
| SHDN C/D | 9 | I | Shutdown control, channels C and D (active low) | |
| V– | 11 | 13 | — | Negative (lowest) power supply |
| V+ | 4 | 4 | — | Positive (highest) power supply |
