Important changes to forums and questions

All forums and questions are now archived. To start a new conversation or read the latest updates go to forums.mbed.com.

ARM

Topic last updated 11 Dec 2012, by triad ---...---. 3 replies
Philips Philips
06 Nov 2012

Hello,

Do any of ARM products have a Analog input of more than 3.3v like perhaps 9v it has to be a successive approximation register converter tho.

thanks,

Mike Gann
06 Nov 2012

Philips Philips wrote:

Hello,

Do any of ARM products have a Analog input of more than 3.3v like perhaps 9v it has to be a successive approximation register converter tho.

thanks,

Hi Phillips -

I think you are going to have to look for an off chip solution for something like that. For the most part the ADC's included on chip in general purpose microcontrollers are not too specialized. I'm sure there are some exceptions, but why limit yourself?

Have you looked at Linear Technologies website, for example the LTC1609? This is a 16 bit SAR with an SPI interface and uni-polar input ranges up to 0-10V and bi-polar input ranges up to +/- 10V. This is powered off a single 5V supply.

http://www.linear.com/product/LTC1609

This was just an example of the first place I looked. I'm sure Analog Devices, Texas Instruments and others may offer similar devices as well.

Mike

Jörg Boge
06 Nov 2012

Why You don´t use a voltage divider?

triad ---...---
11 Dec 2012

How about a DC-DC converter?