ANALOG_DIGITAL_CONVERSION

Published:2009/7/5 22:09:00 Author:May | From:SeekIC

Circuit canbe used for either ramp orsuccessive-approximation method of converting analog input to digital word, applying it to DAC, and comparing analog output of DAC to analog input to be converted. Results of comparison determine next digital word to be generated for DAC by microprocessor. LM301A changes 0-2 mA output of DAC into 0-5 V for LM311 comparator. To calibrate, apply all 0s to DAC; pin 6 of LM301A should now be near 0V Apply all 1s to DAC and adjust output of LM301A to 5.00 V with R4，Conversion routines implementing these functions are given for Motorola MC6800 and Intel 8008 microprocessors.-R, Frank, Microprocessor Based Analog/Digital Conversion.BYTE, May 1976.p70－73.



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