Overview
The OPA657U/2K5, produced by Texas Instruments, is a high-gain bandwidth, low-noise, FET-input operational amplifier. This device is designed to offer exceptional performance in high-precision and wideband applications. It features a high gain bandwidth product of 1.6 GHz and a high bandwidth of 275 MHz at a gain of 10, making it suitable for applications requiring high dynamic range and accuracy. The OPA657 is built using a very high-speed complementary bipolar process, ensuring low input voltage noise and high input impedance, which are crucial for optical front-end applications and test and measurement systems.
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 Range | ±4 V to ±6 V | |
| Quiescent Current | 14 mA (Typical) |
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
- High slew rate of 700 V/µs
- Fast overdrive recovery
- High output current capability of 70 mA
- 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 of the OPA657 at a gain of 10 is 275 MHz.
- What is the input voltage noise of the OPA657?
The input voltage noise of the OPA657 is 4.8 nV/√Hz.
- What is the input bias current of the OPA657?
The input bias current of the OPA657 is 2 pA.
- What is the slew rate of the OPA657?
The slew rate of the OPA657 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 or sink up to 70 mA of output current.
- What is the operating temperature range of the OPA657?
The operating temperature range of the OPA657 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?
- What are some common applications of the OPA657?
The OPA657 is commonly used in wideband photodiode amplifiers, ADC input amplifiers, test and measurement front ends, wafer scanning equipment, high-gain precision amplifiers, and Optical Time Domain Reflectometry (OTDR).
