Chopper amplifiers complement a DC accurate lowpass filter
Nello Sevastopoulos
Abstract
The LTC1062, which is ideal when used in conjunction with high performance chopper-stabilized operational amplifiers; is described.
Keywords
Filter design
lowpass filter
chopper amplifier
LTC1062
LTC1050
Monolithic switched-capacitor lowpass filters, although they offer precise frequency responses, cannot usually be used for DC accurate applications because of their prohibitive DC offsets and poor gain linearity. The LTC1062, however, is quite different from currently available lowpass switched-capacitor filters because it uses an external (R, C) to isolate the IC from the input-signal DC path and to provide anti-aliasing for incoming ...
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