The LMH32404 device is a highly integrated transimpedance amplifier with four independent channels. Each channel has its own single-ended input, differential output stage, and multiplexing switch. The integrated switch can be used to disconnect the differential output amplifier from the output pin, thereby enabling high-impedance output for the respective channel. This feature is useful in order to multiplex all multiple output channels together to form a single output. The pins M1 through M4 control the multiplexer switches for channels one through four respectively. The multiplexer pins will default to logic low which places the channel in the standby mode if left unconnected. The corresponding multiplexer pin must be connected to a logic high value to enable the channel. The EVM features four easy to use jumpers labeled M1 through M4 that control the multiplexer functions for channels one through four respectively. The EVM ships by default with the multiplexer pins set to logic high, which enables all four channels. Any channel can be easily disabled or enabled by changing its corresponding jumper pin position.