Kristof Geldhof

CW7.3 - EVM56F8367 - ADC does not measure negative voltages in differential mode?

Discussion created by Kristof Geldhof on Nov 15, 2007
Latest reply on Nov 22, 2007 by Pascal Irrle


I applied a bipolar test voltage (Fig. 'test_voltage.jpg' in attachment) at pin 1 of the ADC of the 56F8367 evaluation module. I configured the ADC to work in differential mode. Pin 0 was tied to the analog ground. The result of the ADC conversion (Fig. 'adc_result.jpg') reveals only one polarity of the voltage. How come?

Thanks in advance for any help.

Kristof Geldhof




Message Edited by t.dowe on 2009-09-04 10:43 AM