Overview
The OPA657UBG4, produced by Texas Instruments, is a high-performance, 1.6-GHz, low-noise, FET-input operational amplifier. This device combines a high-gain bandwidth product with a low-voltage noise JFET-input stage, making it ideal for high-precision applications such as analog-to-digital converter (ADC) driving, wideband transimpedance amplifiers, and photodiode applications. The OPA657 is decompensated to optimize its bandwidth and quiescent current performance, ensuring exceptional dynamic range and accuracy.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Gain Bandwidth Product | 1.6 GHz | |
| Bandwidth (G = 10) | 275 MHz | |
| Slew Rate (G = 10, 1-V Step) | 700 V/µs | |
| Input Offset Voltage | ±250 µV | |
| Input Bias Current | 2 pA | |
| Input Voltage Noise | 4.8 nV/√Hz | |
| Output Current | 70 mA (sourcing), -70 mA (sinking) | |
| Operating Temperature Range | -40°C to 85°C | |
| Power Supply Range | ±4 V to ±6 V | |
| Quiescent Current | 11.7 mA to 16.2 mA |
Key Features
- High gain bandwidth product of 1.6 GHz
- High bandwidth of 275 MHz at a gain of 10
- Low input voltage noise of 4.8 nV/√Hz
- Low input bias current of 2 pA
- Fast slew rate of 700 V/µs
- High output current capability of 70 mA
- Fast overdrive recovery
- Operating temperature range from -40°C to 85°C
- Available in SOT-23 and SOIC-8 packages
Applications
- Wideband photodiode amplifiers
- ADC input amplifiers
- Test and measurement front ends
- Wafer scanning equipment
- High gain precision amplifiers
- Optical Time Domain Reflectometry (OTDR)
Q & A
- What is the gain bandwidth product of the OPA657?
The gain bandwidth product of the OPA657 is 1.6 GHz.
- What is the typical bandwidth of the OPA657 at a gain of 10?
The typical bandwidth at a gain of 10 is 275 MHz.
- What is the input voltage noise of the OPA657?
The input voltage noise is 4.8 nV/√Hz.
- What is the input bias current of the OPA657?
The input bias current is 2 pA.
- What is the slew rate of the OPA657?
The slew rate is 700 V/µs at a gain of 10 with a 1-V step.
- What are the typical output current capabilities of the OPA657?
The OPA657 can source up to 70 mA and sink up to -70 mA.
- What is the operating temperature range of the OPA657?
The operating temperature range is from -40°C to 85°C.
- In what packages is the OPA657 available?
The OPA657 is available in SOT-23 and SOIC-8 packages.
- Can the OPA657 be used in single-supply configurations?
Yes, the OPA657 can be used in single-supply configurations with proper biasing of the input and output.
- What are some common applications of the OPA657?
Common applications include wideband photodiode amplifiers, ADC input amplifiers, test and measurement front ends, wafer scanning equipment, high gain precision amplifiers, and OTDR systems.
