Knock Sensor Chip TPIC8101 or HIP9010

[prayami]

Does anybody have work with Knock Sensor Chip TPIC8101 or HIP9010?

When I produces the knock through Knock Sensor this chip produces
the OUT signal what it should be i.e at some voltage level (Analog
Signal) according to Knock strength. But after that I don't produce any
knock i.e. input zero, it is retain the last output signal. Now if I
produce another different(Not zero) Knock then it is produces the
correct out signal . Why it is retaining the Integrator's output signal when
there is no Knock or input zero.

Actually, at the start of the every INT/HOLD signal, this should reset
the last Sample and Hold signal. So if input is zero it should be zero.

Strange thing is, if input is something else than zero, then output is
correct.

Thanks.....

[PCM programmer]

Did you look at the eval board appnote ? It contains a lot of
information on using the device:
http://www.intersil.com/data/an/an9770.pdf

[prayami]

Thanks a lot PCM Programmer....It seems a very useful
document. It gives answers of lots of questions in my mind.

Thanks again...