369 Programmable Hardware Manual (PHM)
© Tibbo Technology Inc.
Details
This ADC Tibbit uses four ADC1100 16-bit analog-to-digital converter ICs. All four
converters are used in the differential mode, i.e. the "+" and "-" lines of each ADC
are exposed to the outside world.
ADCs are connected to a PIC16F1824 microcontroller. PIC micro interfaces ADCs to
the main CPU of the TPP board and also stores the calibration data in its EEPROM.
This calibration data is written into the EEPROM during manufacturing, when each
ADC channel is individually tested and calibrated. The calibration data reduces the
full-scale error caused by the imperfection of ADC input divider stages (not shown
on the diagram).
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