Advanced Linear Devices ALD2721
The ALD2721E/ALD2721 is a dual monolithic rail-to-rail precision CMOS operational amplifier with integrated user programmable EPAD (Electrically Programmable Analog Device) based offset voltage adjustment. The ALD2721E/ALD2721 is a dual version of the ALD1721E/ALD1721 operational amplifier. Each ALD2721E/ALD2721 operational amplifier features individual, user-programmable offset voltage trimming resulting in significantly enhanced total system performance and user flexibility.FEATURES
● EPAD ( Electrically Programmable Analog Device)● User programmable VOS trimmer
● Computer-assisted trimming
● Rail-to-rail input/output
● Compatible with standard EPAD Programmer
● Each amplifier VOS can be trimmed to a different Vos level
● High precision through in-system circuit trimming
● Reduces or eliminates VOS, PSRR, CMRR and TCVOS errors
● System level “calibration” capability
● Application Specific Programming mode
● In-System Programming mode
● Electrically programmable to compensate for external component tolerances
● Achieves 0.01pA input bias current and 35µV input offset voltage with micropower
● Low voltage operation
GENERAL DESCRIPTION
EPAD technology is an exclusive ALD design which has been refined for analog applications where precision voltage trimming is necessary to achieve a desired performance. It utilizes CMOS FETs as in-circuit elements for trimming of offset voltage bias characteristics with the aid of a personal computer under software control. Once programmed, the set parameters are stored indefinitely.