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sinara-hw / SiLPA_HL

Simple Low distortion Power Amplifier
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IC18 Reference Voltage for MAX1329 is damaged #5

Open tprzywoz opened 1 year ago

tprzywoz commented 1 year ago

On my test board IC18 output is ~0.5 V (even with R85 and R86 removed). Probably it's because MAX1329 receives VREF before configuring the AVDD (default state of MAX's Internal Charge Pump is OFF)

gkasprow commented 1 year ago

we need to route AVDD to SHDN of reference source

tprzywoz commented 1 year ago

Just remember that AVDD is about 4 V.

skuchars commented 3 months ago

From ADR391 datasheet: image I assume we will use first option? Regarding @tprzywoz last note - there is no specified maximum voltage for Shutdown Logic High and minimum is 2.4 V, and V_IN can range from 2.8 V to 15 V, so I think 4 V will be ok.

skuchars commented 3 months ago

@gkasprow

gkasprow commented 3 months ago

4V is OK, it,s within the supply range

skuchars commented 1 month ago

image