Overview
The OPA2137EA/2K5 is a dual FET-input operational amplifier from Texas Instruments, part of the OPA137 series. This device is designed for low-cost and miniature applications, offering high performance and reliability. The OPA2137EA/2K5 is available in the MSOP-8 surface mount package and is suitable for a wide range of general-purpose applications. It features low input bias current, low quiescent current, and high open-loop gain, making it an excellent choice for various electronic circuits.
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) | VCM = 0V | ±5 | ±100 | pA | |
| Quiescent Current | Per Channel | 220 | µA | ||
| Supply Voltage Range | ±2.25V to ±18V | V | |||
| Gain-Bandwidth Product (GBW) | 1 | MHz | |||
| Slew Rate (SR) | G = 1 | 3.5 | V/µs | ||
| Common-Mode Voltage Range (VCM) | (V–) + 3 to (V+) | V | |||
| Operating Temperature Range | –40°C to +85°C | °C | |||
| Package Type | MSOP-8 Surface Mount |
Key Features
- FET Input: Low input bias current of 5pA.
- Low Offset Voltage: Input offset voltage of ±1.5mV.
- Wide Supply Range: Operates from ±2.25V to ±18V (or +4.5V to +36V single supply).
- Low Quiescent Current: 220µA per channel.
- High Speed/Power Ratio: Gain-bandwidth product of 1MHz and slew rate of 3.5V/µs.
- 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.
- Low Noise: Input voltage noise density of 45nV/√Hz at 1kHz.
Applications
The OPA2137EA/2K5 is suitable for a wide range of general-purpose applications, including:
- Audio and video circuits.
- Medical devices and diagnostic equipment.
- Industrial control systems.
- Test and measurement instruments.
- Single-supply applications where the input common-mode voltage range includes the positive supply.
Power supply pins should be bypassed with 10nF ceramic capacitors or larger to ensure stable operation.
Q & A
- What is the input bias current of the OPA2137EA/2K5?
The input bias current is ±5pA.
- What is the operating temperature range of the OPA2137EA/2K5?
The specified operating temperature range is –40°C to +85°C.
- What are the available package types for the OPA2137EA/2K5?
The OPA2137EA/2K5 is available in the MSOP-8 surface mount package.
- What is the gain-bandwidth product of the OPA2137EA/2K5?
The gain-bandwidth product is 1MHz.
- What is the slew rate of the OPA2137EA/2K5?
The slew rate is 3.5V/µs.
- Can the OPA2137EA/2K5 operate on low supply voltages?
Yes, it can operate on power supplies as low as ±2.25V.
- What is the common-mode voltage range for the OPA2137EA/2K5?
The common-mode voltage range is from (V–) + 3V to (V+).
- Is the OPA2137EA/2K5 suitable for single-supply applications?
Yes, it is suitable for single-supply applications where the input common-mode voltage range includes the positive supply.
- How should the power supply pins be bypassed for stable operation?
Power supply pins should be bypassed with 10nF ceramic capacitors or larger.
- What is the quiescent current per channel for the OPA2137EA/2K5?
The quiescent current per channel is 220µA.
- Is the OPA2137EA/2K5 unity-gain stable?
Yes, the OPA2137EA/2K5 is unity-gain stable.
