Texas Instruments OPA165x Ultra-Low-Noise Audio Op Amps
Texas Instruments OPA165x Ultra-Low-Noise Audio Operational Amplifiers are designed specifically for audio and industrial applications where maintaining signal fidelity is crucial. The OPA165x Op Amps offer a FET-input architecture that achieves a low 2.9nV/√Hz voltage noise density and 6fA/√Hz current noise density. This feature allows for very low noise performance in various circuits.
The OPA165x features a high bandwidth and open-loop-gain design, delivering a low distortion of 0.000035% (-129dB) at 20kHz and improving audio signal fidelity across the full audio bandwidth. The devices have excellent output current drive capability, offering rail-to-rail output swing to within 250mV of the power supplies with a 2kΩ load, and can deliver 100mA of output current.
The OPA165x operates over a very wide supply range of ±2.25V to ±18V or (4.5V to 36V) on 3.9mA of supply current. This feature accommodates the power supply constraints of many types of audio products. The Texas Instruments OPA1656 has a specified temperature range from –40°C to +125°C and is offered in an 8-pin SOIC package.
Features
- Ultra-low noise
- 2.9nV/√Hz at 10kHz voltage noise
- 6fA/√Hz at 1kHz current noise
- Low distortion
- 0.000029% (–131dB) at 1kHz
- 0.000035% (–129dB) at 20kHz
- 150dB high open-loop gain
- 100mA high output current
- 10pA low input bias current
- 24V/µs slew rate
- 53MHz gain-bandwidth product
- Rail-to-rail output
- Wide supply range
- ±2.25V to ±18V or 4.5V to 36V
- 3.9mA per channel quiescent current
Applications
- Soundbar
- Turntable
- DJ controllers, mixers, and other DJ equipment
- Professional audio mixer or control surface
- High-fidelity D/A converter
- Guitar effects pedal
- Guitar amplifier and other music instrument amplifier
- Professional microphones and wireless systems
- Headset and headphones
- Vibration analysis
Related Development Tools
Texas Instruments Universal Operational Amplifier EVMs
General purpose blank circuit boards that simplify the evaluation of operational amplifiers.
Texas Instruments Universal DIY Amplifier Circuit EVMs
Provides engineers and do it yourselfers (DIYers) with real-world amplifier circuits.