Overview
The OPA656UB from Texas Instruments is a high-performance, wideband, unity-gain stable, FET-input operational amplifier. This device is designed to offer ultra-high dynamic range and low noise, making it ideal for various high-speed and precision applications. The OPA656UB features a JFET input stage, which provides high input impedance and low input bias current, ensuring excellent DC accuracy and minimal noise contribution.
The amplifier is compensated to be unity-gain stable and operates over a wide temperature range of -40°C to +85°C, making it suitable for industrial and other demanding environments. With its high gain-bandwidth product of 230MHz and large-signal bandwidth of 150MHz, the OPA656UB is a versatile component for a variety of applications requiring high-speed signal processing.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Brand | Texas Instruments | |
| Mounting Type | Surface Mount | |
| Package Type | SOIC | |
| Power Supply Type | Dual | |
| Number of Channels per Chip | 1 | |
| Pin Count | 8 | |
| Typical Gain Bandwidth Product | 230MHz | |
| Typical Dual Supply Voltage | ±5V | |
| Minimum Operating Temperature | -40 °C | |
| Maximum Operating Temperature | +85 °C | |
| Rail to Rail | No | |
| Height | 1.58mm | |
| Dimensions | 4.9 x 3.91 x 1.58mm | |
| Length | 4.9mm | |
| Width | 3.91mm |
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 signal fidelity with low distortion levels (HD2, HD3 at 5MHz: –80dBc, –100dBc).
- Low Input Bias Current: Input bias current as low as 2pA, ensuring minimal loading on the input signal source.
- High Input Impedance: JFET input stage provides high input impedance, making it suitable for applications requiring minimal signal loading.
- ESD Protection: Internal ESD protection diodes to the power supplies, providing moderate protection against input overdrive voltages.
Applications
- High-Speed Data Acquisition (DAQ): Ideal for front-ends in high-speed data acquisition systems due to its wide bandwidth and low noise.
- Medical and Chemical Analyzers: Used in medical and chemical analysis equipment where high precision and low noise are critical.
- Active Probes: Suitable for active probes in test and measurement applications requiring high input impedance and low noise.
- Oscilloscopes: Used in oscilloscope front-ends for high-speed signal processing and measurement.
- Optical Communication Modules: Excellent choice for optical communication modules due to its high dynamic range and low noise characteristics.
- Test and Measurement Front-ends: Ideal for various test and measurement applications requiring high precision and wide bandwidth).
- Optical Time-Domain Reflectometry (OTDR): Used in OTDR systems for its high input impedance and low noise performance).
Q & A
- What is the typical gain-bandwidth product of the OPA656UB?
The typical gain-bandwidth product of the OPA656UB is 230MHz.
- What is the operating temperature range of the OPA656UB?
The OPA656UB operates over a temperature range of -40°C to +85°C.
- What is the input bias current of the OPA656UB?
The input bias current of the OPA656UB is as low as 2pA.
- Does the OPA656UB have rail-to-rail output capability?
No, the OPA656UB does not have rail-to-rail output capability.
- What are the typical supply voltages for the OPA656UB?
The OPA656UB typically operates with dual supply voltages of ±5V, but can operate within a range of 8V to 12V.
- What are some common applications of the OPA656UB?
The OPA656UB is commonly used in high-speed data acquisition, medical and chemical analyzers, active probes, oscilloscopes, and optical communication modules.
- What is the package type of the OPA656UB?
The OPA656UB comes in an 8-pin SOIC package.
- Does the OPA656UB have internal ESD protection?
- What is the input voltage noise of the OPA656UB?
The input voltage noise of the OPA656UB is 6nV/√Hz.
- Is the OPA656UB suitable for high-speed digitizer front-ends?
