This document is the official manual of ADS1205, which introduces the features and characteristics of ADS1205, including 16-bit resolution, 14-bit linearity, ±2.5V input range at 2.5V, internal reference voltage 2%, gain error 0.5%, two independent delta-sigma modulators, two input reference buffers, On-Chip 20MHz oscillator, selectable internal or external clock, operating temperature range -40°C to +85°C, QFN-24 (4x4) package etc.