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ADuC847 noise

Hello, 

I'm currently working with an ADuC847 processor to read signals from a load cell, the signals are in the range of 0mV to 10mV. The problem is that i'm facing way too much noise on the reading, i've tried a lot of things, enable and disable CHOP, change the SF ISR, but my biggest problem is that i need a great aquisition frequency and not too much noise. 

I'm reading the ADC section on the Datasheet but i simply can't find out a solution. Is there any digital filters that work fine? I'm trying to implement some, but none is working and the weigh variation is way too big (~10g). The only way to reduce the variation is to reduce the aquisition frequency, but i need a frequency of, at least, 7ms. 

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  • Ok, no one will help me here. 

    I just want to say that the ADuC847 is a complete s**t and shouldn't be used on any application. It's ADC is simply terrible and can't even give 1g precision on a load cell of 60Kg, that's ridiculous having in mind that the processor has a 24bit ADC. 

    Built-in ADC's are useless and don't work. The only good use for the ADuC847 processor is setting fire on it. 

    PS: Analog Devices doesn't even care, they just say to you "hey, ADuC84x devices are old, buy our new ADuCM devices". Terrible company. 

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  • Ok, no one will help me here. 

    I just want to say that the ADuC847 is a complete s**t and shouldn't be used on any application. It's ADC is simply terrible and can't even give 1g precision on a load cell of 60Kg, that's ridiculous having in mind that the processor has a 24bit ADC. 

    Built-in ADC's are useless and don't work. The only good use for the ADuC847 processor is setting fire on it. 

    PS: Analog Devices doesn't even care, they just say to you "hey, ADuC84x devices are old, buy our new ADuCM devices". Terrible company. 

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