Overview
The OPA657, produced by Texas Instruments, is a high-gain bandwidth, voltage-feedback operational amplifier featuring a low-noise JFET input stage. This device is decompensated to optimize bandwidth and quiescent current performance, making it ideal for applications requiring high input impedance and low voltage noise. The OPA657 is built using a very high-speed complementary bipolar process, making it suitable 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 | 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
- High slew rate of 700 V/µs
- Fast overdrive recovery
- Internal ESD protection diodes
- Support for both split-supply and single-supply operation
Applications
- Wideband photodiode amplifiers
- Wafer scanning equipment
- ADC input amplifiers
- Test and measurement front ends
- 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 at a gain of 10 and a 1-V step?
The slew rate of the OPA657 at a gain of 10 and a 1-V step is 700 V/µs.
- What is the operating temperature range of the OPA657?
The operating temperature range of the OPA657 is –40°C to 85°C.
- Can the OPA657 operate on a single supply?
- What are some common applications of the OPA657?
The OPA657 is commonly used in wideband photodiode amplifiers, wafer scanning equipment, ADC input amplifiers, test and measurement front ends, high gain precision amplifiers, and optical Time Domain Reflectometry (OTDR).
- Does the OPA657 have internal ESD protection?
- What are the package options for the OPA657?
The OPA657 is available in SOT-23 (5-pin) and SOIC (8-pin) packages.
