1) Do you have a four channel part? Not at this time, but we have plans to do a multichannel product Q4 ‘97. We also have 4 digital output lines which can be used to control either switches or a multiplexer through the ADC’s serial port, thus eliminating the use of an extra port on the system μC and additional opto-isolators in isolated applications. 2) How does the 4-bit digital latch on a DS ADC allow me to change channels? The CS5525 and CS5526 as well as the CS5504 family of ADC’s are designed to settle in one conversion cycle. This means a mux can be switched from channel-to-channel with every conversion while maintaining resolution and accuracy.