Category: Hardware
Product Number: ADMV8052
I am trying to communicate with the ADMV8052 BP Filter via an STM32L4 microcontroller. All I am trying to do at this point is configure SPI comms in register 0x000. I write 0x3c to the register and attempt to read it back. Once that has been confirmed, I'll go on to read the chip and product ID for verification before making any other changes. The issues I am seeing are as follows:
- Low voltage on SDO. We read out from the pin, but it only peaks at approx 1.6V
- Low voltage on bypass pin. Given the datasheet, I'd expect 2.5V on bypass, but I only see ~1.6V. 3.3V and -2.5V are present on their respective input pins.
I have swapped out the ADMV8052 for a fresh chip, and the issues persist. Schematic is below:
SFL is held low in software.
