unable to make the insamp to work !!!! | Cypress Semiconductor
unable to make the insamp to work !!!!
I need some advice(s) because I am not able to make the differential amplifier to work ...
I have two square waves around 100KHz, 0 to 50mV
one of the square wave is the reference and is a "pure" 100KHz square wave
the other is moving with a sensor, between 0 and 50mV too
I want to amplify the difference between the two signals.
I tried the insamp, with two or three amps, the 2 signals are declared as analoginput, the reference is vss
the output of the insamp is an analogoutbuf
the output I can see is only made of noise... it moves a very little 2mV maximum
it should move between 0 and 50mV * 16 = 800mV
There is something i miss, and I really want to know what
there was an appnote for interfacing a mpx pressure sensor to a psoc, but it doesnt seems to be on the cypress site ?
this appnote seems really to be like the measures I want to make
can someone help me ? point me the things to verify when using the insamp and that I could have missed ?