Overview
The OPA137NA/3K is a FET-input operational amplifier produced by Texas Instruments. It is part of the OPA137 series, which includes single, dual, and quad versions. These amplifiers are designed for low-cost and miniature applications, offering a compact footprint in SOT-23-5, MSOP-8, SO-8, and DIP packages. The OPA137NA/3K is known for its low input bias current, low quiescent current, and high open-loop gain, making it suitable for a wide range of general-purpose applications.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | TA = –40°C to +85°C | ±1.5 | ±3 | ±2.5 | mV |
| Input Bias Current (IB) | 5 | pA | |||
| Quiescent Current | 220 | µA/channel | |||
| Supply Voltage Range | ±2.25V to ±18V | V | |||
| Open-Loop Gain (AOL) | VO = –13.8V to 13.9V | 86 | 94 | dB | |
| Gain-Bandwidth Product (GBW) | 1 | MHz | |||
| Slew Rate (SR) | G = 1 | 3.5 | V/µs | ||
| Settling Time (0.1%) | G = 1, 10V Step, CL = 100pF | 8 | µs |
Key Features
- FET Input: Low input bias current of 5pA.
- Low Offset Voltage: Typical input offset voltage of ±3mV.
- Wide Supply Range: Operates from ±2.25V to ±18V (or +4.5V to +36V single supply).
- Low Quiescent Current: 220µA per channel.
- Excellent Speed/Power: 1MHz gain-bandwidth product and 3.5V/µs slew rate.
- Input to Positive Supply: Input common-mode voltage range extends to the positive supply rail.
- MicroSIZE Packages: Available in SOT-23-5, MSOP-8, SO-8, and DIP packages.
- Single, Dual, and Quad Versions: Identical specifications for maximum design flexibility.
- High Open-Loop Gain: 94dB open-loop voltage gain.
- Fast Settling Time: Ensures good dynamic response.
- Completely Independent Circuitry: In dual and quad versions, ensuring low crosstalk and freedom from interaction.
Applications
The OPA137NA/3K is suitable for a wide range of general-purpose applications, including but not limited to:
- Single-supply applications due to its input common-mode voltage range extending to the positive supply rail.
- Audio and video circuits where low noise and high linearity are required.
- Control loop applications where phase-reversal protection is essential.
- Medical and industrial instrumentation due to its high accuracy and stability over temperature.
- Portable and battery-powered devices benefiting from its low quiescent current.
Q & A
- What is the input bias current of the OPA137NA/3K?
The input bias current is 5pA.
- What is the typical input offset voltage of the OPA137NA/3K?
The typical input offset voltage is ±3mV.
- What is the supply voltage range for the OPA137NA/3K?
The OPA137NA/3K operates from ±2.25V to ±18V (or +4.5V to +36V single supply).
- What is the quiescent current per channel for the OPA137NA/3K?
The quiescent current is 220µA per channel.
- What is the gain-bandwidth product of the OPA137NA/3K?
The gain-bandwidth product is 1MHz.
- What is the slew rate of the OPA137NA/3K?
The slew rate is 3.5V/µs.
- Does the OPA137NA/3K have phase-reversal protection?
Yes, the OPA137NA/3K is free from phase-reversal problems found in some FET-input amplifiers.
- What are the available package types for the OPA137NA/3K?
The OPA137NA/3K is available in SOT-23-5, MSOP-8, SO-8, and DIP packages.
- What is the operating temperature range for the OPA137NA/3K?
The specified operating temperature range is –40°C to +85°C, with operation possible from –55°C to +125°C.
- Is the OPA137NA/3K suitable for single-supply applications?
Yes, it is suitable for single-supply applications due to its input common-mode voltage range extending to the positive supply rail.
