MAX32665-MAX32668 User Guide
Maxim Integrated Page 246 of 457
11. Analog to Digital Converter and Comparators (ADC)
The Analog to Digital Converter (ADC) is a 10-bit sigma-delta ADC with a single-ended input multiplexer and an integrated
reference generator. The multiplexer selects an input channel from either of the 8 external analog input signals or the
internal power supply inputs. The external analog input signals are defined as alternate functions on GPIO as shown in Table
6-2: MAX32665—MAX32668 GPIO and Alternate Function Matrix, 140 WLP. The 10-bit ADC conversions are stored as a 16-
bit value selectable as most-significant bit (MSB) or least-significant bit (LSB) aligned. The 8 external analog inputs can be
configured as 4 two-input comparators with interrupt capabilities.
11.1 Features
• 8MHz maximum ADC clock rate
• Two reference sources, an internal 1.22V bandgap or the VDDA analog supply
• 8 External analog inputs that can be configured as 4 two-input comparators
• 10 Internal power supply monitor inputs
• Fixed 10-bit word conversion time of 1024 ADC clock cycles
• Programmable out-of-range (limit) detection
• Interrupt generation for limit detection, conversion start, conversion complete, and internal reference powered on
• Serial ADC data measurements
• ADC conversion 10-bit output either MSB or LSB aligned
11.2 Instances
Table 6-1 lists the locations of the External ADC inputs for each package.
Table 11-1: MAX32665—MAX32668 ADC Peripheral Pins
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