Overview
The OPA129U, manufactured by Texas Instruments, is an ultra-low bias current Difet® operational amplifier. This device is part of the OPA129 series, which is known for its high precision and low noise characteristics. The OPA129U is available in an 8-pin SOIC package and is designed for a wide range of general-purpose and precision amplifier applications. It is particularly noted for its extremely low input bias current, making it suitable for applications requiring high input impedance and low offset current.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Bias Current | 0.1 | pA |
| Bandwidth | 1 | MHz |
| Slew Rate | 2.5 | V/μs |
| Supply Voltage Range | ±5V to ±18V | V |
| Operating Temperature Range | -40°C to 85°C | °C |
| Package Type | 8-SOIC (0.154", 3.90mm Width) | |
| No. of Amplifiers | 1 | |
| No. of Pins | 8 | |
| RoHS Compliant | Yes |
Key Features
- Ultra-low input bias current of 0.1 pA, making it ideal for high-impedance sources and low offset current applications.
- High gain-bandwidth product of 1 MHz.
- Low noise and high common-mode rejection ratio (CMRR) of 80 dB.
- Wide supply voltage range from ±5V to ±18V, allowing for flexibility in various applications.
- Available in 8-pin SOIC package, suitable for surface mount applications.
- RoHS compliant, ensuring environmental sustainability.
Applications
- Photodiode amplifiers: The OPA129U is often used in photodiode amplifier circuits due to its low input bias current and high input impedance.
- Precision instrumentation: Suitable for applications requiring high precision and low noise, such as in medical devices, test equipment, and industrial control systems.
- High-impedance sensor interfaces: Ideal for interfacing with high-impedance sensors where low input bias current is crucial.
- Audio and video equipment: Used in audio and video circuits where low noise and high fidelity are required.
Q & A
- What is the input bias current of the OPA129U?
The input bias current of the OPA129U is 0.1 pA.
- What is the bandwidth of the OPA129U?
The bandwidth of the OPA129U is 1 MHz.
- What is the slew rate of the OPA129U?
The slew rate of the OPA129U is 2.5 V/μs.
- What is the supply voltage range for the OPA129U?
The supply voltage range for the OPA129U is ±5V to ±18V.
- What package types are available for the OPA129U?
The OPA129U is available in an 8-pin SOIC package.
- Is the OPA129U RoHS compliant?
Yes, the OPA129U is RoHS compliant.
- What are some common applications for the OPA129U?
The OPA129U is commonly used in photodiode amplifiers, precision instrumentation, high-impedance sensor interfaces, and audio/video equipment.
- Why is the OPA129U suitable for photodiode amplifier applications?
The OPA129U is suitable for photodiode amplifier applications due to its ultra-low input bias current and high input impedance.
- Can the OPA129U be used in high-temperature environments?
The OPA129U operates within a temperature range of -40°C to 85°C.
- Is there a pin-compatible replacement for the OPA129U if it becomes obsolete?
Currently, there is no pin-compatible replacement for the OPA129U. However, alternatives like the LMP7721 can be considered with adjustments to the circuit design.
