Overview
The OPA27GU/2K5G4, produced by Texas Instruments, is an ultra-low noise, high-precision monolithic operational amplifier. This device is part of the OPA27 series, which is known for its excellent long-term voltage offset stability and superior performance compared to traditional zener-zap techniques. The OPA27 is internally compensated for unity-gain stability, making it suitable for a wide range of precision applications. It features laser-trimmed thin-film resistors and a unique bias current cancellation circuit, ensuring stable operation over the full –40°C to +85°C temperature range.
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 | |
| Open-Loop Gain | RL ≥ 2kΩ | 117 | 124 | dB | |
| Common-Mode Rejection | VIN = ±11VDC | 100 | 122 | dB | |
| Power-Supply Rejection | ±VCC = 4 to 18V | 94 | 120 | dB | |
| Supply Voltage | ±4 | ±22 | VDC | ||
| Operating Temperature Range | –40 | +85 | °C | ||
| Package | SOIC (D) 8 pins |
Key Features
- Ultra-Low Noise: 4.5 nV/√Hz max at 1 kHz
- Low Offset: 100 µV max
- Low Drift: 0.4 µV/°C
- High Open-Loop Gain: 117 dB min
- High Common-Mode Rejection: 100 dB min
- High Power-Supply Rejection: 94 dB min
- Compatibility: Fits OP-07, OP-05, AD510, and AD517 sockets
- Temperature Stability: Unique bias current cancellation circuit for stable operation over –40°C to +85°C
Applications
- Precision Instrumentation: High accuracy and stability make it ideal for precision measurement instruments.
- Data Acquisition: Suitable for data acquisition systems requiring low noise and high precision.
- Test Equipment: Used in various test and measurement equipment due to its high performance characteristics.
- Professional Audio Equipment: Ideal for professional audio applications where low noise and high fidelity are critical.
- Transducer Amplifiers: Often used in transducer amplification due to its low noise and high gain stability.
- Radiation Hard Equipment: Suitable for applications in radiation-hard environments.
Q & A
- What is the maximum input noise voltage of the OPA27GU/2K5G4 at 1 kHz?
4.5 nV/√Hz max at 1 kHz.
- What is the typical input offset voltage of the OPA27GU/2K5G4?
±100 µV max.
- What is the operating temperature range of the OPA27GU/2K5G4?
–40°C to +85°C.
- What is the common-mode rejection ratio (CMRR) of the OPA27GU/2K5G4?
100 dB min.
- What is the power-supply rejection ratio (PSRR) of the OPA27GU/2K5G4?
94 dB min.
- Is the OPA27GU/2K5G4 internally compensated for unity-gain stability?
- What type of package does the OPA27GU/2K5G4 come in?
SOIC (D) with 8 pins.
- What are some common applications of the OPA27GU/2K5G4?
Precision instrumentation, data acquisition, test equipment, professional audio equipment, transducer amplifiers, and radiation-hard equipment.
- How does the OPA27GU/2K5G4 handle bias and offset current over temperature?
A unique bias current cancellation circuit ensures stable bias and offset current specifications over the full –40°C to +85°C temperature range.
- Can the OPA27GU/2K5G4 replace other industry-standard operational amplifiers?
