I'm just getting started with ADPD 4100 and had a few questions based on my read of the datasheet + eval board datasheet.
1. Hoping to better understand the INP12_x register (pg. 91 on the datasheet). If INP12_x is set to 0111 (IN1 and IN2 connected to Channel 1. Single-ended or differential, based on PAIR12) and PAIR12 is set to 0 (single-ended), what is the final configuration? How are two single-ended inputs connected to the same channel?
2. The ADPD4100 datasheet mentions adding caps at each led (CVLED), but I don't see these on the eval board. Am I missing something or is there a reason these aren't used?
3. The ADPD4100 datasheet mentions adding a flyback diode reverse biased across the LED power to reduce voltage spikes if using "long" wires. Any intuition on when this is required? My longest wire to an LED will be ~12cm - could estimate based on wire inductance but not sure how fast the turn-off time is.
Thanks so much!