Greetings!
I've been experiencing some problems with my ADXRS401 gyro chip. I've actually fabricated a circuit board quite similar to that included in the datasheet of the ADXRS401 evaluation board (actually, copied it verbatim =)
When I tested the chip, the rate output is stuck at 1.25 volts, even in slightly accelerated rotation. I've also tried to excite the self test pins but the change in the output rate voltage is very very minimal. the capacitors that I've used for the charge pump are the ceramic type. (Vcc = 5V)
What puzzles me more is that the Temperature Sensor and the 2.5v Voltage Reference pins are both working, indicating that I've powered up the chip properly.
I have two ADXRS401 chips and both of them act exactly the same way.
My hunch is that the charge pump circuit is not working properly but I don't have any idea how to check it.
Any of you guys have encountered the same problem? Or at least those who have experienced working with this chip, did you encounter some difficulties at the start or made any modifications in the interface circuit provided in the datasheet?
any feedback would be highly appreciated. thanks!
url of the datasheet: