Hi, Has anyone know about the resistance between the A1-B1 and A2-B2 terminals of AD5242 used in the magnetometer circuitry? It is written AD5242 B100 on the IC, does it mean that it is 100k Ohm?
Another thing is that, experimentally, i see that 1unit of potentiometer change results in a change of 54 ADC counts. When i looked at the circuit diagram at the MTS-MDA User's Manual and assuming that the A1-B1 and A2-B2 resistances are both 100kOhms, i calculate it about 54 ADC counts. Could anyone confirm this? Actually, on the web, i found two sources: 1. Alec Woo's presentation: "magnetometer_calibration" in which he mentions that 1 unit of potentiometer change results in 140 ADC counts! 2. A paper from UCLA, "Magnetometer Detection and Temperature Noise Control with SOS", it is written 1 unit of potentiometer change results in 32 ADC counts! Is this situation due to different hardware versions? As i recall, there is no hardware version printed on the pcb, so i could not prove this claim! Any suggestions? Thanks in advance, -- Mehmet Akif Antepli
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