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Discussion Groups | LPC900 | LPC a/d conversion

Find help, specifications and source code for the LPC900. The LPC900 challenges Microchip and AVR based on the worlds most popular 8-bit architecture the 80C51. With a 2-clock core the LPC900 series is a high performance, very flexible and low cost 8-bit microcontroller family. Designers using or interested in these devices are encouraged to share their know-how and ask questions.

LPC a/d conversion - gispul - Mar 13 6:16:00 2006

Hello to everyone!

I need help and/or suggestion to realize a smart load cell(classic 
wheatstone bridge) using an LPC917. The system needs 14 bits 
resolution with +-1LSB accuracy (or more), slow sample rate (2 or 4 
sample/sec.).
I gived a look to AN10187 "Low-cost A/D-Conversion with Philips LPC 
microcontrollers" application note and i think the best solution is 
the dual slope conversion type.
The application advise to utilize an external OP amplifier to improve 
the accuracy and resolution but dont show how to connect it.

Do somebody have any suggestion or schematics for this solution?

Thank you in advance!


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