Voltage divider array IC

catostay

I would like to give a higher voltage to to input ports of the propeller and I am looking for an IC to protect the input ports with a voltage divider. I am using right now a 10k resistor to GND and a 1K resistor to a Propeller pin which works fine. I however need 8 voltage dividers for 8 input ports and to save some assembly time I was looking for an IC which makes life easier.

I looked at Mouser and Digikey but so far I was not able to find the right IC because I don't know what I should look for.
Does anyone know about any voltage divider IC which I could use?


Thanks for you help

Post Edited (catostay) : 7/19/2009 1:41:17 AM GMT

Mike Green

I've not seen any voltage divider IC, but you can easily get resistor arrays with 8 resistors all of the same value. You would need one resistor array of 1K resistors and one of 10K resistors.

Here's one 1K network in a DIP package for an example:
www.mouser.com/Search/ProductDetail.aspx?qs=sGAEpiMZZMvrmc6UYKmaNWQksCmc3yhh%2fpyZolAtSWE%3d

catostay

Hi Mike

Thank for you fast answer. Yes I know about the resistor arrays and I tried to use them but it is very difficult to manage a voltage divider on a single sided board. I also would like to save some space on the board. One IC would be better than one and definitely better that 16 resistors on the board.

Post Edited (catostay) : 7/19/2009 1:52:18 AM GMT

Mike Green

For the 1K part of the divider, you'd need a 16 pin DIP package, but for the 10K portion, you'd use a SIP with a common terminal for the ground end of the resistors. It would be very easy to manage the layout on a single sided board and it would be only maybe 30% bigger than a single DIP.