SPRUJ17I March 2022 – August 2025 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
For best performance, all ADCs on the device must be operated synchronously. The device data sheet specifies the performance in both synchronous and asynchronous mode for those parameters which differ between the modes of operation.
To make sure of synchronous operation, all ADCs on the device must operate in lockstep. This is accomplished by writing configurations to all ADCs that cause the sampling and conversion phases of all ADCs to be exactly aligned. The easiest way to accomplish this is to write identical values to the SOC configurations for each ADC for trigger select and ACQPS (S+H duration). In addition, synchronous ADCs must also configure identical values for the SOC priority control, burst mode, burst trigger, and burst size.
On some products, ADC types can be combined on the device for versatility. Synchronous operation can be restricted when operating different ADC types simultaneously. Consult the device data sheet, if there are restrictions on simultaneous operation of ADCs of different types to understand if ADC performance is impacted.