The ADuC7019/20/21/22/24/25/26/27/28/29 are fully integrated, 12-bit, 1 MSPS data acquisition systems that include Flash?/EE memory, 16-bit/32-bit MCUs, and high performance multichannel ADCs on a single chip. Up to 12 single-ended inputs make up the ADC. The four DAC output pins are multiplexed with the additional four inputs that are accessible. Only select models come with the four DAC outputs (ADuC7020, ADuC7026, ADuC7028, and ADuC7029).
The maximum number of ADC input channels is 16, but in many situations where the DAC outputs are absent, these pins can still be used as additional ADC inputs. Both single-ended and differential input modes are supported by the ADC. ADC input ranges from 0 V to VREF. A low drift band gap reference, temperature sensor, and voltage comparator complete the ADC peripheral set.