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AD5932 Frequency ramp is sometimes not started

Question asked by holenpas on Apr 13, 2018
Latest reply on May 9, 2018 by holenpas

I have successfully configured the AD5932 in automatic frequency ramp mode. The ramp is started periodically by a single pulse at the CTRL pin and this works in most cases (99% of times).

But sometimes (1% of times) the ramp is not started correctly! It seems like the AD5932 recognizes the CTRL pin  because the start frequency is loaded correctly but the ramp is not started afterwards!

I do not reconfigure something over SPI during run-time (FSYNC is kept high). The Interrupt and Standby pin are not used (kept low) during run-time.

Are there any known issues with the AD5932 device or do you have any advises? Thanks!