Overview
The OPA657, produced by Texas Instruments, is a high-gain bandwidth, low-noise, FET-input operational amplifier. 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 applications such as analog-to-digital converter (ADC) driving, wideband transimpedance, and photodiode amplification. The OPA657 is built using a very high-speed complementary bipolar process, ensuring high dynamic range and exceptional input impedance.
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 | ±0.25 mV | |
| 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
- High bandwidth of 275 MHz (G = 10)
- Low input offset voltage: ±0.25 mV
- Low input bias current: 2 pA
- Low input voltage noise: 4.8 nV/√Hz
- High output current: 70 mA
- Fast overdrive recovery
- Internal ESD protection diodes
- Support for both split-supply and single-supply operation
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 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 offset voltage of the OPA657?
The input offset voltage of the OPA657 is typically ±0.25 mV.
- What is the input bias current of the OPA657?
The input bias current of the OPA657 is 2 pA.
- What is the input voltage noise of the OPA657?
The input voltage noise of the OPA657 is 4.8 nV/√Hz.
- What is the maximum output current of the OPA657?
The maximum output current of the OPA657 is 70 mA.
- 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 be used in single-supply configurations?
- What are some common applications of the OPA657?
- Does the OPA657 have internal ESD protection?
