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Forum: Analog Circuits How about a low pass filter followed by LTC6085 and then to the ADC KW40Z sound?


Author: Elijah C. (meideolian)
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Hello,

I'm designing my first ever circuit for a hobby project. I've a sensor 
that outputs in mV and a controller with ADC. The ADC is 16 bits, VDDA = 
3.0 V, Temp =25°C, fADCK = 1.0 MHz. Since the sensor voltage that is fed 
is to the controller is low I'm in a predicament! Should I use a low 
pass filter or a band pass filter in this application? Do you have a 
circuit that I can relate to?

(The attached)

The sensor is a screen printed piezoelectric sensor. Since it is printed 
on textile, textiles present a very low dielectric constant that reduces 
the surface wave losses and increases the impedance bandwidth.

How about a low pass filter followed by LTC6085 
(http://www.kynix.com/uploadfiles/pdf9675/LTC6085CDHC23PBF_778665.pdf)
and then to the ADC KW40Z
(https://www.nxp.com/docs/en/data-sheet/MKW40Z160.pdf) sound?

Any advice is appreciated. Thanks.

Author: ths (Guest)
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Author: Elijah C. (meideolian)
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