Overview
The OPA37GU/2K5 is an ultra-low noise, high-precision monolithic operational amplifier produced by Texas Instruments. It is part of the OPA37 series, which is known for its excellent long-term voltage offset stability and superior performance characteristics. The OPA37GU/2K5 is internally compensated for stability at gains of 5 or greater, making it suitable for a wide range of precision applications. It replaces industry-standard operational amplifiers like the OP-37 and offers improved specifications and reliability.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Noise Voltage | fO = 1kHz | 3.2 | 4.5 | nV/√Hz | |
| Input Offset Voltage | ±25 | ±100 | µV | ||
| Average Drift | TA MIN to TA MAX | ±0.4 | ±1.8 | µV/°C | |
| Common-Mode Rejection Ratio | VIN = ±11VDC | 100 | 122 | dB | |
| Open-Loop Voltage Gain | RL ≥ 2kΩ | 117 | 124 | dB | |
| Gain-Bandwidth Product | 45 | 63 | MHz | ||
| Slew Rate | VO = ±10V, RL = 2kΩ, G = +5 | 11 | 11.9 | V/µs | |
| Supply Voltage | ±4 | ±22 | VDC | ||
| Quiescent Current | IO = 0mA | 3.3 | 5.7 | mA | |
| Operating Temperature Range | –40 | +85 | °C |
Key Features
- Ultra-low noise: 4.5nV/√Hz max at 1kHz.
- Low input offset voltage: ±100µV max.
- Low drift: 0.4µV/°C.
- High open-loop gain: 117dB min.
- High common-mode rejection ratio: 100dB min.
- High power-supply rejection ratio: 94dB min.
- Internally compensated for stability at gains ≥ 5.
- Wide operating temperature range: –40°C to +85°C.
Applications
- Precision instrumentation.
- Data acquisition.
- Test equipment.
- Professional audio equipment.
- Transducer amplifiers.
- Radiation hard equipment).
Q & A
- What is the maximum input noise voltage of the OPA37GU/2K5 at 1kHz?
4.5nV/√Hz.
- What is the typical input offset voltage of the OPA37GU/2K5?
±100µV).
- What is the average drift of the OPA37GU/2K5 over the operating temperature range?
±0.4µV/°C).
- What is the minimum open-loop voltage gain of the OPA37GU/2K5?
117dB).
- What is the common-mode rejection ratio of the OPA37GU/2K5?
100dB min).
- What is the gain-bandwidth product of the OPA37GU/2K5?
63MHz).
- What is the slew rate of the OPA37GU/2K5 at a gain of +5?
11V/µs).
- What is the supply voltage range for the OPA37GU/2K5?
±4V to ±22VDC).
- What is the quiescent current of the OPA37GU/2K5?
3.3mA to 5.7mA).
- What is the operating temperature range of the OPA37GU/2K5?
–40°C to +85°C).
