Overview
The OPA657UB, 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 applications requiring high dynamic range and precision. The OPA657UB is particularly suited for wideband photodiode amplification, ADC input amplification, test and measurement front ends, and other high-gain precision amplifier applications.
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 | |
| Operating Temperature Range | –40°C to 85°C | |
| Power-Supply Rejection Ratio (+PSRR) | 76 dB | |
| Power-Supply Rejection Ratio (–PSRR) | 62 dB |
Key Features
- High gain bandwidth product of 1.6 GHz
- Low input voltage noise of 4.8 nV/√Hz
- Low input bias current of 2 pA
- High slew rate of 700 V/µs (G = 10, 1-V Step)
- Fast overdrive recovery
- Available in high grade with improved DC specifications
- Internal ESD protection diodes to the power supplies
- Support for both split-supply and single-supply operation
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 OPA657UB?
The gain bandwidth product of the OPA657UB is 1.6 GHz.
- What is the typical input voltage noise of the OPA657UB?
The typical input voltage noise is 4.8 nV/√Hz.
- What is the input bias current of the OPA657UB?
The input bias current is 2 pA.
- What is the slew rate of the OPA657UB at a gain of 10 and a 1-V step?
The slew rate is 700 V/µs.
- What is the operating temperature range of the OPA657UB?
The operating temperature range is –40°C to 85°C.
- Can the OPA657UB be used in single-supply configurations?
- What types of applications benefit from the low-voltage noise JFET inputs of the OPA657UB?
Broadband photodetector applications and high-gain precision amplifier applications benefit from the low-voltage noise JFET inputs.
- Does the OPA657UB have internal ESD protection?
- What is the typical output current of the OPA657UB?
The typical output current is 70 mA.
- How does the OPA657UB perform in terms of power-supply rejection ratio?
The OPA657UB has a power-supply rejection ratio of 76 dB for +PSRR and 62 dB for –PSRR.
