Overview
The OP275GP, produced by Analog Devices Inc., is a dual bipolar/JFET audio operational amplifier. It is the first amplifier to feature the Butler Amplifier front end, combining bipolar and JFET transistors to achieve high accuracy, low noise performance, and excellent sound quality. This design allows for low supply currents while maintaining high slew rates and low distortion, making it ideal for various audio and precision applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| AUDIO PERFORMANCE - THD + Noise | - | VIN = 3 V rms, RL = 2 kΩ, f = 1 kHz | - | - | 0.006 % | - |
| Voltage Noise Density | en | f = 30 Hz | - | - | 7 nV/√Hz | - |
| Voltage Noise Density | en | f = 1 kHz | - | - | 6 nV/√Hz | - |
| Current Noise Density | in | f = 1 kHz | - | - | 1.5 pA/√Hz | - |
| Slew Rate | - | - | - | - | 22 V/μs | - |
| Bandwidth | - | - | - | - | 9 MHz | - |
| Supply Current | - | - | - | 5 mA | 5.5 mA | - |
| Offset Voltage | VOS | -40°C ≤ TA ≤ +85°C | - | - | 1.25 mV | - |
| Input Bias Current | IB | VCM = 0 V | 100 nA | 350 nA | - | - |
| Operating Temperature | - | - | -40°C | - | +85°C | - |
| Package | - | - | - | - | 8-Pin Plastic DIP | - |
Key Features
- Excellent sonic characteristics with low noise (6 nV/√Hz) and low distortion (0.0006% at 3 V rms output).
- High slew rate of 22 V/μs, the fastest among standard audio amplifiers.
- Wide bandwidth of 9 MHz.
- Low supply current of less than 5 mA.
- Low offset voltage (typically less than 200 μV) and low offset current.
- Unity gain stable.
- Available in SOIC-8 and PDIP-8 packages.
Applications
- High-performance audio systems.
- Active filters.
- Fast amplifiers.
- Integrators.
- DC-coupled or summing applications due to its low offset voltage and current.
Q & A
- What is the unique feature of the OP275GP's front end design?
The OP275GP features the Butler Amplifier front end, which combines both bipolar and JFET transistors to achieve high accuracy, low noise performance, and excellent sound quality. - What is the typical noise density of the OP275GP?
The typical noise density is 6 nV/√Hz at 1 kHz. - What is the slew rate of the OP275GP?
The slew rate is 22 V/μs. - What is the bandwidth of the OP275GP?
The bandwidth is 9 MHz. - How much supply current does the OP275GP consume?
The supply current is less than 5 mA. - What is the typical offset voltage of the OP275GP?
The typical offset voltage is less than 200 μV. - In what packages is the OP275GP available?
The OP275GP is available in 8-Pin Plastic DIP and SOIC-8 packages. - What are some common applications of the OP275GP?
Common applications include high-performance audio systems, active filters, fast amplifiers, and integrators. - What is the operating temperature range of the OP275GP?
The operating temperature range is –40°C to +85°C. - Is the OP275GP suitable for DC-coupled applications?
Yes, it is suitable due to its low offset voltage and current.
