DG405 Low-Power, High Speed CMOS Analog Switches

* oAudio and video switching

* oSample-and-hold circuits

* oBattery operation

* oTest equipment

* oCommunications systems

* oPBX, PABX

* oDual Slope Integrators:

* oThe DG403 is well suited to configure a selectable slope integrator. One control signal selects the timing capacitor C1 or C2. Another one selects ein or discharges the capacitor in preparation for the next integration cycle.

* oBand-Pass Switched Capacitor Filter:

* oSingle-pole double-throw switches are a common element for switched capacitor networks and filters. The fast switching times and low leakage of the DG403 allow for higher clock rates and consequently higher filter operating frequencies.

* o

* oPeak Detector:

* oA3 acting as a comparator provides the logic drive for operating SW1. The output of A2 is fed back to A3 and compared to the analog input ein. If ein > eout the output of A3 is high keeping SW1 closed. This allows C1 to charge up to the analog input voltage. When ein goes below eout A3 goes negative, turning SW1 off. The system will therefore store the most positive analog input experienced.