I've soldered an AS5040 on a breakout board (Sparkfun http://www.sparkfun.com/products/498
) and made the connections following the schematics available at http://wiki.makerbot.com/mre2
. I had two strange behaviors testing this system (Arduino example code proposed by MakerBot). The first one is that the two MAG+ and MAG- diagnostics leds turns on/off at the same time, the same if the magnet is too far or too close to the chip (I've tested the two pins for short circuits with my tester but there is no continuity in ohm-meter mode). The second strange behavior is that the Arduino serial monitor give me an output of 0-512 positions for one complete revolution, instead of 1024 steps.
Ok, this AS5040 SMD soldering was my first attempt to place an SSOP chip by myself (technique as per http://www.sparkfun.com/tutorials/96
, using solder wick) and I am afraid of damaging the chip probably because of too much seconds with the iron on the wick to remove the solder between pins, but I'm not sure about this. First of all I'd like to know if the 512 positions output is right or not.