Chopper-Stabilized Op-Amp Design
This chapter is devoted to simplified design with chopper-stabilized IC amplifiers. As discussed in Section 1.14, chopper stabilization is often used where stability is essential over time and with variations in temperature and supply voltage. Figures 6-1 and 6-2 show the internal functions and pinouts, respectively, of a chopper-stabilized op-amp (the Harris ICL7650S). The IC is a direct replacement for the industry standard ICL7650, but with improved input-offset voltage, lower input-offset temperature coefficient, reduced input-bias current, and wider common-mode voltage range.
FIGURE 6-1 Internal ...
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