The ACF2101 is a dual, switched integrator that is typically used to convert a positive input current to a negative output voltage by integration, using an integration capacitor (CINT), either on the chip or a external capacitor provided by the user. Typical applications for the ACF2101 are photo diode integrators (as shown in Figure 1), current measurements, charge measurements, and a CT scanner front end. In Figure 1, 1/2 of the ACF2101 integrates a positive input current to a 0 to –10V output signal. The transfer function of the integrator is: