Overview
The OPA627AU is a high-performance, precision operational amplifier produced by Texas Instruments. It is part of the OPA6x7 series, which includes the OPA627 and OPA637 models. These operational amplifiers are designed to provide a new level of performance in precision FET operational amplifiers, offering lower noise, lower offset voltage, and higher speed compared to other models like the OPA111. The OPA627AU is fabricated on a high-speed, dielectrically-isolated, complementary NPN/PNP process and operates over a wide power-supply voltage range of ±4.5V to ±18V. It features laser-trimmed input circuitry for high accuracy and low-noise performance, making it suitable for a broad range of precision and high-speed analog circuitry.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Input Offset Voltage (VOS) | ±100 | µV |
| Input Offset Voltage Drift (dVOS/dT) | ±0.8 | µV/°C |
| Input Bias Current (IB) | ±5 | pA |
| Power Supply Rejection Ratio (PSRR) | 105 - 117 | dB |
| Gain-Bandwidth Product (GBW) | 16 | MHz |
| Slew Rate | 55 | V/µs |
| Settling Time (to 0.01%) | 550 | ns |
| Output Voltage Range | ±11.5 | V |
| Output Current | ±45 | mA |
| Operating Temperature Range | -25 to 85 | °C |
| Package Type | 8-SOIC |
Key Features
- Very Low Noise: 4.5nV/√Hz at 10kHz
- Fast Settling Time: 550ns to 0.01% for the OPA627
- Low VOS and Drift: Maximum input offset voltage of 100µV and drift of 0.8µV/°C
- Low Input Bias Current: Maximum of 5pA
- Unity-Gain Stability: The OPA627 is unity-gain stable, while the OPA637 is stable in gains ≥ 5
- High Slew Rate: 55V/µs
- High Output Current: Capable of delivering up to 45mA
Applications
- Precision Instrumentation: Ideal for applications requiring high accuracy and low noise
- Fast Data Acquisition: Suitable for high-speed data acquisition systems
- DAC Output Amplifier: Used in digital-to-analog converter output stages
- Optoelectronics: Applicable in optoelectronic circuits
- Sonar and Ultrasound: Used in sonar and ultrasound applications
- High-Impedance Sensor Amplifiers: Suitable for amplifying signals from high-impedance sensors
- High-Performance Audio Circuitry: Used in high-performance audio systems
- Active Filters: Can be used in active filter circuits
Q & A
- What is the input offset voltage of the OPA627AU?
The input offset voltage (VOS) of the OPA627AU is ±100µV maximum.
- What is the slew rate of the OPA627AU?
The slew rate of the OPA627AU is 55V/µs.
- What is the gain-bandwidth product of the OPA627AU?
The gain-bandwidth product (GBW) of the OPA627AU is 16 MHz.
- Is the OPA627AU unity-gain stable?
Yes, the OPA627AU is unity-gain stable.
- What is the maximum output current of the OPA627AU?
The maximum output current of the OPA627AU is ±45mA.
- What is the operating temperature range of the OPA627AU?
The operating temperature range of the OPA627AU is -25°C to 85°C.
- What package types are available for the OPA627AU?
The OPA627AU is available in an 8-SOIC package.
- What are some common applications of the OPA627AU?
The OPA627AU is commonly used in precision instrumentation, fast data acquisition, DAC output amplifiers, optoelectronics, sonar, ultrasound, high-impedance sensor amplifiers, high-performance audio circuitry, and active filters.
- What is the input bias current of the OPA627AU?
The input bias current (IB) of the OPA627AU is ±5pA maximum.
- How does the OPA627AU compare to other operational amplifiers like the OPA111?
The OPA627AU has lower noise, lower offset voltage, and higher speed compared to the OPA111.
