LTC1605ACN
The device in question is a 16-bit analog-to-digital converter packaged in a 28-pin Dual In-line Package (PDIP) with an input labeled as "Input 1".
Product Specifications:
Base Product Number
LTC1605
Manufacturer
Analog Devices Inc
Moisture Sensitivity Level (MSL)
1 (Unlimited)
Other Names
161-LTC1605ACN | 161-LTC1605ACNINACTIVE | 161-LTC1605ACN