Overview
The OPA380AIDGKRG4, produced by Texas Instruments, is a high-performance transimpedance amplifier that offers high-speed operation with extremely high precision and excellent long-term stability. This amplifier is part of the OPA380 family, which is ideally suited for high-speed photodiode applications, fast control loops for power level on optical fibers, and other precision I/V conversion tasks. The OPA380 features a unique architecture that combines an internal auto-zero amplifier with a high-speed amplifier, resulting in very low 1/f noise and exceptional offset, drift, and noise performance compared to conventional JFET op amps.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Gain Bandwidth (GBW) | 90 | MHz |
| Transimpedance Bandwidth | > 1 | MHz |
| Offset Voltage (VOS) | 25 | µV (max) |
| Offset Drift (dVOS/dT) | 0.1 | µV/°C (max) |
| Bias Current | 50 | pA (max) |
| Dynamic Range | 4 to 5 Decades | |
| Quiescent Current (IQ) | 7.5 | mA |
| Supply Range (VS) | 2.7 to 5.5 | V |
| Operating Temperature Range | -40 to 125 | °C |
| Package | MSOP-8, SO-8 |
Key Features
- High-speed operation with a gain bandwidth of 90MHz and transimpedance bandwidth of > 1MHz.
- Excellent long-term input voltage offset stability and very low 1/f noise.
- Low offset voltage of 25µV and offset drift of 0.1µV/°C.
- Very low bias current of 50pA.
- Wide dynamic range of 4 to 5 decades, allowing measurement of signal currents from 1nA to 100µA in a single I/V conversion stage.
- Single and dual versions available, with miniature MSOP-8 package options.
- Extended output voltage range to include 0V using an external pull-down resistor to -5V.
Applications
- Photodiode monitoring and high-speed photodiode applications.
- Precision I/V conversion.
- Optical amplifiers.
- CAT-scanner front-end applications.
- Fast control loops for power level on optical fibers.
Q & A
- What is the gain bandwidth of the OPA380AIDGKRG4?
The gain bandwidth of the OPA380AIDGKRG4 is 90MHz.
- What is the typical offset voltage of the OPA380AIDGKRG4?
The typical offset voltage is 25µV.
- What is the bias current of the OPA380AIDGKRG4?
The bias current is 50pA (max).
- What is the dynamic range of the OPA380AIDGKRG4?
The dynamic range is 4 to 5 decades.
- What are the available package options for the OPA380AIDGKRG4?
The OPA380AIDGKRG4 is available in MSOP-8 and SO-8 packages.
- What is the operating temperature range of the OPA380AIDGKRG4?
The operating temperature range is -40°C to 125°C.
- What are some common applications of the OPA380AIDGKRG4?
Common applications include photodiode monitoring, precision I/V conversion, optical amplifiers, and CAT-scanner front-end applications.
- How can the output voltage range be extended to include 0V?
The output voltage range can be extended to include 0V by using an external pull-down resistor to -5V.
- What is the quiescent current of the OPA380AIDGKRG4?
The quiescent current is 7.5mA.
- What is the supply voltage range for the OPA380AIDGKRG4?
The supply voltage range is 2.7V to 5.5V.
