I am designing a new sensor PCB using the PGA308.I plan to use the PGA308EVM dev board for the development.
My new pcb will be powered by a 3.3V supply. Can I use the PGA308EVM to program my new 3.3V PCB PGA308 (or do I need 5V for programming?)
In other words - does the 1W on the EVM use 3.3V or 5V?
Looking at the PGA308 datasheet, it looks like the logic levels on the 1-wire input are compatible with 3.3V levels even when the part is supplied with 5V:
Analog Applications Engineer
PA Linear Apps
I'd just like to add one important point here - programming the OTP memory of the PGA308 requires a supply of at least +4.5V, so you'd have to temporarily power your system off the EVM's +5V rail when writing to the OTP to get around this requirement. All other functionality is supported with +3.3V supply and logic levels.
Ian WilliamsLinear Applications EngineerPrecision Analog and Sensing Products
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