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Forum Post: RE: Noise signal from ADC input of MSP430i2041TPW during A/D conversion

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Marco, I also saw the 10 mV at A0.0- and forgot to mention it but it does move the differential conversion to zero, thank you for bringing that up. Since a similar noise can be seen at both inputs, perhaps it is worth placing a pulldown resistor on the A- pins to neutralize some of the observed noise from the SD24 readings. Edward, Since we've confirmed that the MSP430I2041 device and SD24 peripheral are operating as expected, I once again think that the solution lies in the hardware design and outside of the MSP430 IC design. This behavior is typical of SD24s and that switching MSP variants will not overcome this dilemma. Unfortunately I do not know of any recent customer experiences that addressed this, most applications involve a metering sensor interface circuit like seen on the EVM430-I2040S . Regards, Ryan

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