Maker Pro
Maker Pro

instrumentation amplifier single supply

CatCat

Sep 23, 2016
4
Joined
Sep 23, 2016
Messages
4
Hi!

So, I got this: http://www.icstation.com/cjmcu-ina3...plifier-module-industrial-control-p-9905.html

Obviously, it’s built around ina-333 which, according to the docs, can be used with a single-supply.
The module has Vref Vcc 3.3V and GND (http://www.icstation.com/images/big/products/9905_4_9729.jpg)
What is the right way to power it?????????

I have an idea what to do with 3.3 and GND, what should I do with Vref and Vcc??

Can I use a voltage divider for the Ref to begin with?? Here (http://electronics.stackexchange.co...nce-for-a-single-supply-instrumentation-ampli) they say no but I’m not sure why……. And the suggested solution is too complicated to me.
Like I thought I don’t need any complex circuits because this is “a ready to use” module. Stupid me……

I do need it to work with negative and positive input voltages. Does it mean I cannot follow Figure 11 (page 10) from this doc: http://www.ti.com/lit/an/sloa030a/sloa030a.pdf?

ught,… how to wire this thing???
 
Top