Si5351 current consumption #chat
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I am comparing the current consumption of the Si5351 under the same conditions (same VCC, same 68 ohm load resistor, full power, unused outputs turned off, steady carrier within the 20m band, same frequency) in two software cases:
2. Within the Etherkit 5351 library (https://github.com/etherkit/
si5351.set_freq(1409717000ULL, SI5351_CLK0); - set frequency to 20m;PLL settings are calculated by the library
This yields about 43mA current draw by the Si5351 (10mA more than U3S/OE1CGS sketch).
Adding a couple of instructions to turn off the unused outputs clocks:
results in a lower current, ~ 39mA, but still about 6mA higher than U3S/OE1CGS sketch.
I suspect there is a catch, like finding the exact PLL specifications or turning off the unused PLL or anything like this, but I cannot figure it out. I'm just hoping anyone has any ideas.