Overview
The OPA656NB/250, 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 ultra-high dynamic range. This amplifier is particularly suited for transimpedance applications and high-speed data acquisition front-ends. The OPA656NB/250 is part of the OPA656 series, which offers various package options and performance grades to meet different application needs.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| Input-referred offset voltage (VOS) | ±0.1 | ±0.6 | ±0.9 | mV |
| Input offset voltage drift | ±2 | ±6 | µV/°C | |
| Input bias current (IB) | ±2 | ±20 | ±1250 | pA |
| Common-mode rejection ratio (CMRR) | 84 | 95 | dB | |
| Positive power-supply rejection ratio (+PSRR) | 74 | 90 | dB | |
| Negative power-supply rejection ratio (-PSRR) | 62 | 85 | dB | |
| Gain-bandwidth product (GBW) | 230 | MHz | ||
| Unity-gain bandwidth | 550 | MHz | ||
| Large-signal bandwidth (2VPP) | 150 | MHz | ||
| Input voltage noise | 6 | nV/√Hz | ||
| Supply range | 8 | 12 | V | |
| Operating temperature range | -40 | 85 | °C |
Key Features
- Wide Bandwidth: Gain-bandwidth product of 230MHz, unity-gain bandwidth of 550MHz, and large-signal bandwidth of 150MHz (2VPP).
- High Precision: Input offset voltage of ±0.6mV (maximum), and input offset voltage drift of ±6µV/°C (maximum).
- Low Noise: Input voltage noise of 6nV/√Hz.
- Low Distortion: Second and third harmonic distortions of -80dBc and -100dBc at 5MHz, respectively.
- Low Input Bias Current: Input bias current of 2pA.
- ESD Protection: Internal ESD protection diodes to the power supplies.
- Supply Range: Operates on a supply range of 8V to 12V.
Applications
- High-speed Data Acquisition (DAQ): Ideal for high-speed data acquisition systems due to its wide bandwidth and low noise.
- Medical and Chemical Analyzers: Suitable for precision measurement applications in medical and chemical analyzers.
- Active Probes: Used in active probes for their high input impedance and low noise characteristics.
- Oscilloscopes: Applicable in oscilloscope front-ends for high-speed signal processing.
- Optical Communication Modules: Used in optical communication modules for transimpedance applications.
- Test and Measurement Front-ends: Ideal for test and measurement equipment requiring high precision and wide bandwidth).
- Optical Time-Domain Reflectometry (OTDR): Suitable for OTDR applications due to its high dynamic range and low noise).
Q & A
- What is the gain-bandwidth product of the OPA656NB/250?
The gain-bandwidth product of the OPA656NB/250 is 230MHz.
- What is the unity-gain bandwidth of the OPA656NB/250?
The unity-gain bandwidth of the OPA656NB/250 is 550MHz).
- What is the input offset voltage of the OPA656NB/250?
The input offset voltage of the OPA656NB/250 is ±0.6mV (maximum)).
- What is the input bias current of the OPA656NB/250?
The input bias current of the OPA656NB/250 is 2pA).
- What is the supply range for the OPA656NB/250?
The OPA656NB/250 operates on a supply range of 8V to 12V).
- What are the typical applications of the OPA656NB/250?
The OPA656NB/250 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 OPA656NB/250 have ESD protection?
Yes, the OPA656NB/250 has internal ESD protection diodes to the power supplies).
- What is the operating temperature range of the OPA656NB/250?
The operating temperature range of the OPA656NB/250 is -40°C to 85°C).
- What package types are available for the OPA656NB/250?
The OPA656NB/250 is available in SOT-23 and SOIC packages).
- Is the OPA656NB/250 RoHS compliant?
Yes, the OPA656NB/250 is RoHS compliant).
