Overview
The OPA656UB/2K5, produced by Texas Instruments, is a high-performance, wideband, unity-gain stable, voltage-feedback operational amplifier. It features a low-noise junction gate field-effect transistor (JFET) input stage, making it ideal for applications requiring high input impedance and low noise. The amplifier is designed for use in high-speed data acquisition, medical and chemical analyzers, active probes, oscilloscopes, optical communication modules, and test and measurement front-ends. The OPA656UB/2K5 is part of the high-grade series, offering tighter specifications for key DC parameters, ensuring excellent DC precision and dynamic range.
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 | - | 0.6 | - | mV |
| Input Offset Voltage Drift | - | 6 | - | μV/°C |
| Input Voltage Noise | - | 6 | - | nV/√Hz |
| Input Bias Current | - | 2 | - | pA |
| Supply Range | 8 | 10 | 12 | V |
| Ambient Temperature Range | -40 | - | 85 | °C |
| Output Voltage Swing (No Load) | - | ±3.9 | - | V |
| Output Current (Sourcing) | 50 | 70 | - | mA |
| Output Current (Sinking) | -70 | -50 | - | mA |
Key Features
- Wide Bandwidth: Gain-bandwidth product of 230MHz, unity-gain bandwidth of 550MHz, and large-signal bandwidth of 150MHz.
- High Precision: Low input offset voltage (600μV maximum), low input offset voltage drift (6μV/°C maximum), and ultra-low input voltage noise (6nV/√Hz).
- Low Distortion: High second and third harmonic distortion performance (HD2, HD3 at 5MHz: –80dBc, –100dBc).
- Low Input Bias Current: 2pA input bias current.
- High Input Impedance: Differential input impedance of 10^10 Ω || 2.6 pF and common-mode input impedance of 10^12 Ω || 0.4 pF.
- ESD Protection: Internal ESD protection diodes to the power supplies.
- Operating Temperature Range: Specified to operate over the industrial temperature range of –40°C to +85°C.
Applications
- High-Speed Data Acquisition (DAQ): Ideal for high-speed digitizer front-ends.
- Medical and Chemical Analyzers: Suitable for precision measurement in medical and chemical analysis.
- Active Probes: Used in active probes for test and measurement.
- Oscilloscopes: Enhances performance in oscilloscope applications.
- Optical Communication Modules: Excellent for optical test and communication equipment.
- Test and Measurement Front-ends: Widely used in various test and measurement applications.
- Optical Time-Domain Reflectometry (OTDR): Suitable for OTDR applications.
Q & A
- What is the gain-bandwidth product of the OPA656UB/2K5?
The gain-bandwidth product of the OPA656UB/2K5 is 230MHz.
- What is the unity-gain bandwidth of the OPA656UB/2K5?
The unity-gain bandwidth of the OPA656UB/2K5 is 550MHz.
- What is the input voltage noise of the OPA656UB/2K5?
The input voltage noise of the OPA656UB/2K5 is 6nV/√Hz.
- What is the input bias current of the OPA656UB/2K5?
The input bias current of the OPA656UB/2K5 is 2pA.
- What is the supply voltage range for the OPA656UB/2K5?
The supply voltage range for the OPA656UB/2K5 is 8V to 12V.
- What are the typical applications of the OPA656UB/2K5?
The OPA656UB/2K5 is typically used in high-speed data acquisition, medical and chemical analyzers, active probes, oscilloscopes, optical communication modules, and test and measurement front-ends.
- Does the OPA656UB/2K5 have ESD protection?
Yes, the OPA656UB/2K5 has internal ESD protection diodes to the power supplies.
- What is the operating temperature range of the OPA656UB/2K5?
The operating temperature range of the OPA656UB/2K5 is –40°C to +85°C.
- What are the package options for the OPA656UB/2K5?
The OPA656UB/2K5 is available in D (SOIC, 8-pin) and DBV (SOT-23, 5-pin) packages.
- How does the OPA656UB/2K5 perform in terms of distortion?
The OPA656UB/2K5 has low distortion, with HD2 and HD3 at 5MHz being –80dBc and –100dBc, respectively.
