Overview
The OPA322AIDBVR, part of the OPAx322x series from Texas Instruments, is a single-channel CMOS operational amplifier known for its low noise, rail-to-rail inputs and outputs, and high performance in low-power, single-supply applications. This device is optimized for a wide range of applications requiring high gain and low noise, such as sensor signal conditioning, consumer audio, and control-loop amplifiers. The OPA322AIDBVR operates over a supply voltage range of 1.8 V to 5.5 V and features a low quiescent current of 1.5 mA, making it suitable for power-sensitive designs.
Key Specifications
| Parameter | Typical | Minimum | Maximum | Unit |
|---|---|---|---|---|
| Gain Bandwidth | 20 | - | - | MHz |
| Input Voltage Noise Density | 8.5 | - | - | nV/√Hz at 1 kHz |
| Slew Rate | 10 | - | - | V/μs |
| Total Harmonic Distortion + Noise (THD+N) | 0.0005% | - | - | at 10 kHz, G = +1, RL = 10 kΩ |
| Supply Voltage | - | 1.8 | 5.5 | V |
| Quiescent Current per Amplifier | 1.5 | - | 1.75 | mA at VS = 5.5 V, TA = 25°C |
| Offset Voltage | - | - | 2 | mV |
| Common-Mode Rejection Ratio (CMRR) | - | 90 | 100 | dB at TA = 25°C |
| Phase Margin | - | - | 47 | ° at VS = 5 V, CL = 50 pF |
| Operating Temperature Range | - | -40 | 125 | °C |
Key Features
- Low noise: 8.5 nV/√Hz at 1 kHz
- High gain bandwidth: 20 MHz
- Fast slew rate: 10 V/μs
- Rail-to-rail inputs and outputs
- Low THD+N: 0.0005% at 10 kHz, G = +1, RL = 10 kΩ
- Unity-gain stable
- Shutdown mode with low standby current (< 0.1 μA per amplifier)
- Small packages: SOT-23 (5-pin and 6-pin)
- Wide supply voltage range: 1.8 V to 5.5 V
Applications
- Sensor signal conditioning
- Consumer audio
- Multi-pole active filters
- Control-loop amplifiers
- Communications
- Security systems
- Scanners
Q & A
- What is the gain bandwidth of the OPA322AIDBVR?
The gain bandwidth of the OPA322AIDBVR is 20 MHz. - What is the typical input voltage noise density of the OPA322AIDBVR?
The typical input voltage noise density is 8.5 nV/√Hz at 1 kHz. - What is the slew rate of the OPA322AIDBVR?
The slew rate is 10 V/μs. - What is the total harmonic distortion + noise (THD+N) of the OPA322AIDBVR?
The THD+N is 0.0005% at 10 kHz, G = +1, RL = 10 kΩ. - What is the supply voltage range of the OPA322AIDBVR?
The supply voltage range is 1.8 V to 5.5 V. - What is the quiescent current per amplifier of the OPA322AIDBVR?
The quiescent current per amplifier is typically 1.5 mA at VS = 5.5 V, TA = 25°C. - Does the OPA322AIDBVR have a shutdown mode?
Yes, the OPA322AIDBVR has a shutdown mode with a low standby current of less than 0.1 μA per amplifier. - What are the typical operating temperatures for the OPA322AIDBVR?
The operating temperature range is –40°C to 125°C. - In what packages is the OPA322AIDBVR available?
The OPA322AIDBVR is available in 5-pin and 6-pin SOT-23 packages. - What are some common applications of the OPA322AIDBVR?
Common applications include sensor signal conditioning, consumer audio, multi-pole active filters, control-loop amplifiers, communications, security systems, and scanners.
