Figure 8-1 shows the 11-bit, on-chip analog-to-digital converter (ADC) of the AMC6821-Q1. This ADC converts the analog input into digital format. The analog input is passed through front-end signal conditioning circuitry to remove the noise. The resulting signal is then converted by the ADC. To further reduce the effects of noise, digital filtering is performed by averaging the results of 32 measurement cycles. After digital filtering, the newest result is stored in the temperature data register (low byte and high byte) in two’s complement format. The ADC stops when the START bit of Configuration Register 1 is cleared ('0') and runs when START = 1.

Figure 8-1 On-Chip Analog-to-Digital Converter