Overview
The OPA1655DR, produced by Texas Instruments, is a Burr-Brown™ ultra-low noise and distortion, FET-input, single audio operational amplifier. This device is specifically designed for audio and industrial applications where maintaining signal fidelity is crucial. The OPA1655 features a low 2.9-nV/√Hz voltage noise density and 6-fA/√Hz current noise density, ensuring very-low noise performance across a wide variety of circuits. With its high bandwidth and high open-loop gain, the OPA1655 delivers low distortion and improves audio signal fidelity across the full audio bandwidth.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Voltage Noise Density | 2.9 nV/√Hz at 10 kHz | nV/√Hz |
| Current Noise Density | 6 fA/√Hz at 1 kHz | fA/√Hz |
| Total Harmonic Distortion + Noise (THD+N) | 0.000029% (–131 dB) at 1 kHz, 0.000035% (–129 dB) at 20 kHz | % (dB) |
| Open-Loop Gain | 150 dB | dB |
| Output Current | 100 mA | mA |
| Input Bias Current | 10 pA | pA |
| Slew Rate | 24 V/μs | V/μs |
| Gain Bandwidth Product | 53 MHz | MHz |
| Supply Voltage Range | ±2.25 V to ±18 V or 4.5 V to 36 V | V |
| Quiescent Current per Channel | 3.9 mA | mA |
| Operating Temperature Range | –40°C to +125°C | °C |
| Package | SOIC (D), 8 pins |
Key Features
- Ultra-Low Noise: 2.9 nV/√Hz voltage noise density and 6 fA/√Hz current noise density.
- Low Distortion: 0.000029% (–131 dB) at 1 kHz and 0.000035% (–129 dB) at 20 kHz.
- High Open-Loop Gain: 150 dB.
- High Output Current: 100 mA.
- Low Input Bias Current: 10 pA.
- Slew Rate: 24 V/μs.
- Gain Bandwidth Product: 53 MHz.
- Rail-to-Rail Output: Output swing to within 250 mV of the power supplies with a 2-kΩ load.
- Wide Supply Range: ±2.25 V to ±18 V or 4.5 V to 36 V.
- Quiescent Current: 3.9 mA per channel.
Applications
- Professional Microphones and Wireless Systems: Ideal for high-fidelity audio applications.
- Professional Audio Mixers/Control Surfaces: Enhances signal fidelity in professional audio equipment.
- Guitar Amplifiers and Other Music Instrument Amplifiers: Suitable for musical instrument amplification.
- A/V Receivers: Used in home and professional audio/video systems.
- Bookshelf Stereo Systems: Improves audio quality in consumer audio systems.
- Professional Audio Amplifiers: High-performance amplification for professional audio setups.
- DJ Equipment: Ensures clear and distortion-free audio in DJ gear.
- Turntables: Enhances audio fidelity in vinyl playback systems.
- Special Function Modules: Can be used in various custom audio circuits and modules.
Q & A
- What is the voltage noise density of the OPA1655?
The voltage noise density of the OPA1655 is 2.9 nV/√Hz at 10 kHz.
- What is the total harmonic distortion + noise (THD+N) of the OPA1655 at 1 kHz and 20 kHz?
The THD+N is 0.000029% (–131 dB) at 1 kHz and 0.000035% (–129 dB) at 20 kHz.
- What is the open-loop gain of the OPA1655?
The open-loop gain of the OPA1655 is 150 dB.
- What is the maximum output current of the OPA1655?
The maximum output current of the OPA1655 is 100 mA.
- What is the input bias current of the OPA1655?
The input bias current of the OPA1655 is 10 pA.
- What is the slew rate of the OPA1655?
The slew rate of the OPA1655 is 24 V/μs.
- What is the gain bandwidth product of the OPA1655?
The gain bandwidth product of the OPA1655 is 53 MHz.
- What is the supply voltage range of the OPA1655?
The supply voltage range of the OPA1655 is ±2.25 V to ±18 V or 4.5 V to 36 V.
- What is the quiescent current per channel of the OPA1655?
The quiescent current per channel of the OPA1655 is 3.9 mA.
- What is the operating temperature range of the OPA1655?
The operating temperature range of the OPA1655 is –40°C to +125°C.
