This part is a kind of semiconductor called AD797.

Function of this product has Ultralow Distortion/ Ultralow Noise Op Amp.

Manufacturers : Analog Devices

Image and pinout :

Some of the text within the PDF file :

Data Sheet FEATURES Low noise 0.9 nV/√Hz typical (1.2 nV/√Hz maximum) input voltage noise at 1 kHz 50 nV p-p input voltage noise, 0.1 Hz to 10 Hz Low distortion −120 dB total harmonic distortion at 20 kHz Excellent ac characteristics 800 ns settling time to 16 bits (10 V step) 110 MHz gain bandwidth (G = 1000) 8 MHz bandwidth (G = 10) 280 kHz full power bandwidth at 20 V p-p 20 V/μs slew rate Excellent dc precision 80 μV maximum input offset voltage 1.0 μV/°C VOS drift Specified for ±5 V and ±15 V power supplies High output drive current of 50 mA APPLICATIONS Professional audio preamplifiers IR, CCD, and sonar imaging systems Spectrum analyzers Ultrasound preamplifiers Seismic detectors Σ-Δ ADC/DAC buffers Table 1. Low Noise Op Amps Voltage Noise 0.9 nV Single AD797 Dua [ ... ]

AD797 PDF Datasheet Download