The LND-FIL309 is an analog voltage multiplexer with up to 48 input channels, followed by a pre-amp with pins for an external resistor to set gain. Digital logic inputs control selection of the desired mux register. The mux can pass either AC or DC signals through the selected line while simultaneously clamping all unused inputs to USEL. The mux output is directly accessible, as is the output of the pre-amp. The centre frequency of the bandpass filter is software adjustable. The output of the filter is buffered. The LNDFIL309 is particularly useful for using a single analysis channel to selectively examine multiple analog sensor inputs using microcontroller control. Applications include embedded systems, position controllers, and multi-channel filters. For customers with high volumes requiring less than 48 input channels, Linear Dimensions can package the LND-FIL309 in packages with fewer pins.