Low-cost A/D-Conversion with Philips LPC Microcontrollers

2021-10-08
●ABSTRACT:
■Microcontrollers with on–chip A/D–converters may not be the first choice for extremely cost–sensitive applications. Philips' LPC family of microcontrollers covers the range from the lowest cost end up to parts with integrated ADC.
■This application note shows how the lowest cost parts can take advantage of LPC features to measure analog signals even with high–resolution.
●INTRODUCTION:
■To process continuously varying data with digital computers, analog values have to be converted to digital quantities. Analog-to-digital converters (ADC) work according to different principles, varying in characteristics, effort and costs.
■There are microcontrollers with integrated ADC offering 10-bit and higher resolution, but the required chip-area and thorough testing to guarantee the desired accuracy add to the cost of such devices.
■Philips' LPC microcontroller families P87LPC76x and P89LPC900 cover a broad range of integrated peripherals including ADCs. This application note describes two methods to implement ADC functions even with the lowest-cost parts not having an integrated ADC.

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LPCP87LPC76xP89LPC900

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microcontrollers

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Application note & Design Guide

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2002 Oct 04

AN10187

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