OPA1655DBVR

The OPA1655 and OPA1656 (OPA165x) are op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. The FET-input architecture achieves a low 2.9‑nV/√Hz voltage noise density and 6‑fA/√Hz current noise density, allowing for very-low noise performance in a wide variety of circuits. The high bandwidth and high open-loop-gain design of the OPA165x delivers a low distortion of 0.000035% (–129 dB) at 20 kHz, and improves audio signal fidelity across the full audio bandwidth. These devices also feature excellent output current drive capability, offering rail-to-rail output swing to within 250 mV of the power supplies with a 2-kΩ load, and can deliver 100 mA of output current. The OPA165x operate over a very wide supply range of ±2.25 V to ±18 V or (4.5 V to 36 V) on 3.9 mA of supply current to accommodate the power-supply constraints of many types of audio products. The temperature range is specified from -40°C to +125°C.

Applications

• Professional microphones and wireless systems
• Professional audio mixer/control surface
• Guitar amplifier and other music instrument amplifier
• A/V receiver
• Bookshelf stereo system
• Professional audio amplifier
• DJ equipment
• Turntable
• Special function module

Key features

• Ultra-low noise:
• Voltage noise: 2.9 nV/√Hz at 10 kHz
• Current noise: 6 fA/√Hz at 1 kHz
• Low distortion:
• 0.000029% (–131 dB) at 1 kHz
• 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
• Wide supply range: ±2.25 V to ±18 V or 4.5 V to 36 V
• Quiescent current: 3.9 mA per channel