This part is a kind of semiconductor called AD203SN.

Function of this product has 10 kHz Bandwidth Isolation Amplifier.

Manufacturers : Analog Devices

Image and pinout :

Some of the text within the PDF file :

r.ANALOG WDEVICES Rugged, Military Temperature Range, 10 kHz Bandwidth Isolation Amplifier AD203SN I FEATURES Rugged Design: C Environmental Test Methods 1004 (Moisture Resistance) 1010 Condition B (Temperature Cycling, -55°C to +125°C) 2002 Condition B (Mechanical Shock@ 1,500 g for 0.5 ms) 2004 (Lead Integrity) 2007 Condition A (Variable Frequency Vibration @20g) 2015 (Resistance to Solvents) Reliable Design: Conforms to Stringent Quality and Reliability Standards Characterized to the Full Military Temperature Range -55°C to +125°C Rated Performance 10 kHz Full Power Bandwidth Low Nonlinearity: ±0.025% max Wide Output Range: ±10 V min (Into a 2.5 k!l Load) High CMV Isolation: 1500 V RMS Continuous Isolated Power: ±15 V DC@ ±5 mA Small Size: 2.23"x0.83"x0.6 [ ... ]

AD203SN PDF Datasheet Download