Overview
The OPA656N/250, produced by Texas Instruments, is a wideband, unity-gain stable, FET-input operational amplifier. This device combines high bandwidth and low noise, making it ideal for applications requiring high input impedance and precision. The OPA656 features a junction gate field-effect transistor (JFET) input stage, which provides ultra-low input voltage noise and high dynamic range, making it suitable for transimpedance applications and high-speed data acquisition front-ends.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Gain-Bandwidth Product | - | 230 | - | MHz |
| Unity-Gain Bandwidth | - | 550 | - | MHz |
| Large-Signal Bandwidth (2VPP) | - | 150 | - | MHz |
| Input Offset Voltage | ±0.1 | ±0.6 | ±0.9 | mV |
| Input Offset Voltage Drift | ±2 | ±6 | - | µV/°C |
| Input Voltage Noise | - | 6 | - | nV/√Hz |
| Input Bias Current | ±2 | ±20 | ±1250 | pA |
| Supply Range | 8 | - | 12 | V |
| Operating Temperature Range | -40 | - | 85 | °C |
Key Features
- Wide bandwidth with a gain-bandwidth product of 230MHz and unity-gain bandwidth of 550MHz.
- High precision with an input offset voltage of ±0.6mV and input offset voltage drift of ±6µV/°C.
- Ultra-low input voltage noise of 6nV/√Hz.
- Low input bias current of 2pA.
- Low distortion with HD2 and HD3 at 5MHz of –80dBc and –100dBc, respectively.
- Supply range of 8V to 12V.
- Internal ESD protection diodes for input overdrive protection.
Applications
- High-speed data acquisition (DAQ).
- Medical and chemical analyzers.
- Active probes.
- Oscilloscopes.
- Optical communication modules.
- Test and measurement front-ends.
- Optical time-domain reflectometry (OTDR).
Q & A
- What is the gain-bandwidth product of the OPA656?
The gain-bandwidth product of the OPA656 is 230MHz.
- What is the unity-gain bandwidth of the OPA656?
The unity-gain bandwidth of the OPA656 is 550MHz.
- What is the input offset voltage of the OPA656?
The input offset voltage of the OPA656 is ±0.6mV.
- What is the input voltage noise of the OPA656?
The input voltage noise of the OPA656 is 6nV/√Hz.
- What is the supply range for the OPA656?
The supply range for the OPA656 is 8V to 12V.
- What are the typical applications of the OPA656?
The OPA656 is typically used in high-speed data acquisition, medical and chemical analyzers, active probes, oscilloscopes, optical communication modules, test and measurement front-ends, and optical time-domain reflectometry (OTDR).
- Does the OPA656 have internal ESD protection?
- What is the operating temperature range of the OPA656?
The operating temperature range of the OPA656 is –40°C to +85°C.
- What are the package options for the OPA656?
The OPA656 is available in SOIC-8 and SOT-23-5 packages.
- Is the OPA656 suitable for high-speed digitizer front-ends?
