OPA1656 SoundPlus™ ultra-low noise and distortion, Burr-Brown™ audio opamp

Description

Description
The OPA1656 is a Burr-Brown™ operational amplifier (op amp) 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 OPA1656 delivers a low distortion of 0.000035% (–129 dB) at 20 kHz, and improves audio signal fidelity across the full audio bandwidth. This device also features 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 OPA1656 operates 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.
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