ADA4625 Operational Amplifiers Analog Devices ADA4625 Operational Amplifiers (Op Amps) are designed as high-voltage, rail-to-rail output (RRO), precision junction field effect transistor (JFET) input operational amplifiers. These operational amplifiers are available in two variables such as ADA4625-1 and ADA4625-2. The fast settling ADA4625 Operational Amplifiers deliver exceptional performance in high-voltage, high-gain, and low-noise applications.