This part is a kind of semiconductor called BA15218N.

Function of this product has Dual high slew rate/ low noise operational amplifier.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Standaed ICs Dual high slew rate, low noise operational amplifier BA15218 / BA15218F / BA15218N The BA15218, BA15218F, and BA15218N are monolithic ICs with two built-in low-noise, low-distortion operational amplifiers featuring internal phase compensation. Either a dual or single power supply can be driven, and these products can be driven by a digital system 5V single power supply. The following packages are available: 8-pin DIP (BA15218), 8-pin SOP (BA15218F), and 8-pin SIP (BA15218N). Features • 1) Low-voltage operation and single power supply drive enabled. (Single power supply: 4 to 32V, dual power supply: ±3 to ±16V) 2) Low noise level. (Vn = 1.0µVrms typ. : RIAA) 3) High slew rate. (SR = 3V / µs, GBW = 10MHz typ.) 4) Low offset voltage. (VIO = 0.5mV typ.) 5) High gain and l [ ... ]

BA15218N PDF Datasheet Download