Hello all,
I am new to the forums and hopefully I can be some help to someone in the future; however, I have a question of my own.
I am testing an instrumentation amplifier (INA128P).
http://search.digikey.com/us/en/products/INA128P/INA128P-ND/251085
I am using a regulated 3.3V as the V+ and ground as the V-.
I am sending 1.0V into Vin+ and hooking Vin- and REF to ground.
I used both a 50k and 100k between the RG pins.
The gain of the in-amp is 1+(50k/RG).
I measured the output with a multimeter and was expecting something around 1.5V and 2V, respectively.
However, I received .094V for both resistance values. So my questions are:
1. Is the in-amp bad or blown?
2. Is this a proper way of testing the in-amp?
3. If it is not the proper way of testing, what would be a better way? I only have two variable power supplies.
Thanks in advance.
I am new to the forums and hopefully I can be some help to someone in the future; however, I have a question of my own.
I am testing an instrumentation amplifier (INA128P).
http://search.digikey.com/us/en/products/INA128P/INA128P-ND/251085
I am using a regulated 3.3V as the V+ and ground as the V-.
I am sending 1.0V into Vin+ and hooking Vin- and REF to ground.
I used both a 50k and 100k between the RG pins.
The gain of the in-amp is 1+(50k/RG).
I measured the output with a multimeter and was expecting something around 1.5V and 2V, respectively.
However, I received .094V for both resistance values. So my questions are:
1. Is the in-amp bad or blown?
2. Is this a proper way of testing the in-amp?
3. If it is not the proper way of testing, what would be a better way? I only have two variable power supplies.
Thanks in advance.