Low bias current precision amplifiers suited to wide variety of applications

Stocked by Farnell element14, the next generation of the AD822 single supply, RRO, precision junction field effect transistors input op amp, the ADA4622-2 features a number of improvements that make it highly desirable as an upgrade, without compromising the flexibility and ease of use that makes the AD822 well-suited to a wide variety of applications. The input voltage range of the devices includes the negative supply and the output swings rail-to-rail. Input EMI filters are added to increase the signal robustness in the face of closely located switching noise sources. The speed - in terms of bandwidth and slew rate - is increased along with a strong output drive to improve settling time performance and enable the device to drive the inputs of modern single-ended, SAR ADCs. Voltage noise is reduced; broadband noise is reduced by 25% and 1/f is reduced by half, all while keeping the supply current at the same level as the AD822. DC precision in the device is improved from the AD822 with half the offset and a maximum thermal drift specification added to it. The common mode rejection ratio is improved from the AD822 to make the ADA4622-2 more suitable when used in non-inverting gain and difference amplifier configurations. The device is specified for operation over the extended industrial temperature range of -40C to +125C and operates from 5V to 30V with specifications at +5V, ±5V, and ±15V. The device is available in 8-lead SOIC, 8-lead MSOP, and 8-lead LFCSP packages.