Pressure Sensor Signal Conditioning Circuit

[yamanoorsai]

Hello All,

I bought a cheap pressure sensor from mouser whose datasheet can be found here:

http://www.components.omron.com/components/web/pdflib.nsf/0/DEFC0948FE2A5C91862577A7005A8099/$file/2SMPP_1010.pdf

The data sheet recommends a constant current circuit for the input and an instrumentation amplifier at the output.

I found a reference circuit in the link below:

https://www.electro-tech-online.com...essure_Sensor_Signal_Conditioning_Circuit.pdf

I am planning to use the LTC1051 for the constant current circuit and AD620 for the instrumentation amplifier. I would like to know whether this is the best way to read the output from the sensor or whether there is an alternative to this circuit. I am planning to choose LTC1051 from the reference circuit and AD620 since the second half of the circuit looks like a typical instrumentation amplifier circuit.

Also, the pressure sensor is really small and requires SMT soldering. I tried soldering it to a general purpose PCB board prototyping board but failed in doing so. I would like to hear the group members recommendation for soldering on top of a prototyping board.

Are there any low cost sensors apart from this Mouser one that has a linear output and could be used for Medical applications?


Thanks,
Sai

 

[Mosaic]

What pressure range are you interested in?

 

[yamanoorsai]

I am targeting the same range. 0 to 37 kPa. I want it for medical applications.