Overview
The Texas Instruments OPA657U is a high-performance, voltage-feedback operational amplifier designed for applications requiring high gain bandwidth, low distortion, and low noise. This device combines a high-gain bandwidth product of 1.6 GHz with a low-voltage noise JFET-input stage, making it ideal for high-precision analog-to-digital converter (ADC) driving and wideband transimpedance applications. The OPA657U is particularly suited for amplifying very low-level signals with exceptional bandwidth and accuracy, and it is widely used in optical front-end applications and test and measurement systems.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Gain Bandwidth Product | 1.6 GHz | |
| Bandwidth (G = 10) | 275 MHz | |
| Slew Rate (G = 10, 1-V Step) | 700 V/µs | |
| Operating Temperature Range | -40°C to 85°C | |
| Input Offset Voltage | ±250 µV | |
| Input Bias Current | 2 pA | |
| Input Voltage Noise | 4.8 nV/√Hz | |
| Output Current | 70 mA | |
| Supply Voltage | ±4 V to ±6 V, 8 V to 12 V | |
| Package | 8-SOIC |
Key Features
- High Gain Bandwidth Product: 1.6 GHz
- High Bandwidth: 275 MHz (G = 10)
- High Slew Rate: 700 V/µs (G = 10, 1-V Step)
- Low Input Offset Voltage: ±250 µV
- Low Input Bias Current: 2 pA
- Low Input Voltage Noise: 4.8 nV/√Hz
- High Output Current: 70 mA
- Fast Overdrive Recovery
- Available in High Grade With Improved DC Specifications
Applications
- Wideband Photodiode Amplifier
- Wafer Scanning Equipment
- ADC Input Amplifier
- Test and Measurement Front End
- High Gain Precision Amplifier
- Optical Time Domain Reflectometry (OTDR)
Q & A
- What is the gain bandwidth product of the OPA657U?
The gain bandwidth product of the OPA657U is 1.6 GHz.
- What is the typical bandwidth of the OPA657U at a gain of 10?
The typical bandwidth at a gain of 10 is 275 MHz.
- What is the slew rate of the OPA657U?
The slew rate is 700 V/µs at a gain of 10 with a 1-V step.
- What is the operating temperature range of the OPA657U?
The operating temperature range is -40°C to 85°C.
- What is the input offset voltage of the OPA657U?
The input offset voltage is ±250 µV.
- What is the input bias current of the OPA657U?
The input bias current is 2 pA.
- What is the input voltage noise of the OPA657U?
The input voltage noise is 4.8 nV/√Hz.
- What is the maximum output current of the OPA657U?
The maximum output current is 70 mA.
- In what package is the OPA657U available?
The OPA657U is available in an 8-SOIC package.
- What are some typical applications of the OPA657U?
Typical applications include wideband photodiode amplifiers, wafer scanning equipment, ADC input amplifiers, test and measurement front ends, high gain precision amplifiers, and optical time domain reflectometry (OTDR).
