LGT8F328P differential amplifier and analog reference test
It is a test for check how differential amplifier works with different refrence voltages and gain. For the test two voltage divider connected to the MCU. One to A3 input, which produce a lower voltage (eg. 0.8V) and the other divider connected to A7 input, which produce a bit higher voltage (eg 0.9V).
The program output looks like this:
Power Supply: 5011 mV
Ref: 1.024V
A7: 912 mV
A3: 843 mV
Ref: 2.048V
A7: 912 mV
A3: 838 mV
Ref: 4.096V
A7: 889 mV
A3: 825 mV
Ref: DEFAULT
A7: 737
A3: 676
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Ref: 1,024V
A7-A3 = 100 mV
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Ref: 2,048V
A7-A3 = 95 mV
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Ref: 4,096V
A7-A3 = 90 mV
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Ref: VCC
A7-A3 = 71
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Ref: 2,048V
(A7-A3) * 1 = 199
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Ref: 2,048V
(A7-A3) * 8 = 1268
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Ref: 2,048V
(A7-A3) *16 = 2393
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Ref: 2,048V
(A7-A3) *32 = 4064
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