Instructions
This tool demonstrates how the RA/B/C/D pins and internal input nodes behave under conditions of high-common mode voltage, using the configuration shown in Fig. 30 of the AD7732 datasheet. In such a configuration common-mode voltages of up to +/-37V are possible.
How to use this tool
Enter voltages for VIN+, VIN- and VREF in the input fields to the left of the circuit diagram. The tool will then compute voltages for important internal nodes within the AD7732. If an input voltage results in an out-of-range value within the circuit,
the value will be highlighted in red.
For example, setting VIN+=40, VIN-=30 and
VREF=2.5 shows a feedback voltage of -6.875V and attenuated
ADC inputs of 3.125V and 1.875V.
Equations
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