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Interactive Design Tools: Instrumentation Amplifiers : Inamp Common-Mode Range / Gain Calculator
Instructions | Troubleshooting | Related Information
Positive Supply  
Equivalent circuit
Differential Voltage
V

Gain
Common Mode Voltage
V

RG
K ohms
Reference Voltage
V
Negative Supply  
 
Equivalent circuit shown



Instructions

Enter data in the fields provided. If an input is out of range an alert will appear.

Click "Update" or tab to another field to see node voltages annotate the schematic on the right. Internal node voltages are for the equivalent 3-opamp circuit, assuming a 0.5V level shift. This may not reflect the actual internal implementation.

If the combination of inputs causes internal or external limits to be exceeded, the problem node value will be highlighted in red and an "Out of Range!" message will appear. When this message is present, all node values should be considered invalid.

Only one of "Gain" or "RG" can be specified - the other is computed automatically.


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Troubleshooting

No special issues are known to exist with this calculator at this time.

For further troubleshooting information, please visit our Interactive Tools troubleshooting page.


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Related Information

A Practical Review of Common Mode and Instrumentation Amplifiers (pdf, 57,234 bytes)


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