The AD8608ARUZ-REEL is a quad precision rail-to-rail I/O op-amp from Analog Devices in TSSOP-14, operating from 1.8-5.5V with 40uA per-channel supply current and 350kHz GBW. The rail-to-rail input stage uses a unique complementary input pair architecture that maintains low offset voltage across the entire common-mode range (0 to VCC), unlike many RRIO op-amps that have a crossover distortion region near mid-supply. The input offset voltage is 50uV typical (250uV max over temperature), and the input bias current is only 0.2pA (MOSFET input), making it ideal for high-impedance sensor interfaces. The output swings to within 10mV of both rails at 10mA load. The voltage noise density is 12nV/sqrt(Hz) at 1kHz, and current noise is negligible (0.1pA/sqrt(Hz)). The 40uA/ch supply current makes it suitable for battery-powered instruments. The device is stable with any capacitive load up to 100pF; for larger loads, a 50-ohm series resistor at the output improves phase margin. The -ARUZ-REEL suffix specifies TSSOP-14, tape-and-reel. Applications include: portable medical instruments, sensor signal conditioning (photodiode, pH, strain gauge), and battery-powered audio preamplifiers.