This part is a kind of semiconductor called BA15532F.

Function of this product has Low Noise Operational Amplifier.

Manufacturers : Rohm

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Datasheet Operational Amplifier Low Noise Operational Amplifier BA15532F General Description BA15532F is a low noise operational amplifier of high voltage gain. It excels especially in input referred noise voltage (0.7μVrms), total harmonic distortion ratio (0.0015%) and operating voltage range (±3.0V to ±20.0V) and it is the most suitable operational amplifier for audio equipments. Features  High Voltage Gain  Low Input Referred Noise Voltage  Low Total Harmonic Distortion  Wide Operating Supply Voltage Application  General Purpose  Audio Application  Active Filter Key Specification  Operating Supply Voltage (Split Supply):  Slew Rate:  Input Referred Noise Voltage:  Total Harmonic Distortion:  Temperature Range: ±3.0V to ±20.0V 8V/µs(Typ) 0. [ ... ]

BA15532F PDF Datasheet Download