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Reference voltages to ADCs of Picoscope3404A

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Reference voltages to ADCs of Picoscope3404A

Postby PVS » Wed Oct 09, 2013 9:21 am

Hi

I have a Picoscope3404A unit. How do you know what will be the reference voltage to ADC of it. Suppose for channel A voltage range 0-5V and channel voltage range 0-5V. Please kindly explain how do I know reference voltages to ADCs of each channel?

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Re: Reference voltages to ADCs of Picoscope3404A

Postby Martyn » Thu Oct 10, 2013 6:52 am

Do you mean the ADC Count to Voltage conversion ?

Code: Select all
Voltage = ADCCount * inputRange /maxValue;

For your example
ADCCount = the reading you have
maxValue = 32512
inputRange = 5V
Martyn
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Re: Reference voltages to ADCs of Picoscope3404A

Postby PVS » Thu Oct 10, 2013 7:25 am

But Picoscope 3404A is 8bit DAQ? How this value 32512 came?
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Re: Reference voltages to ADCs of Picoscope3404A

Postby Martyn » Thu Oct 10, 2013 8:01 am

We use the most significant 8 bits of a 16bit value to represent the data for this scope, it helps to keep consistency across our range of products where we do have 12 and 16 bit devices. It is also more efficient for us when transferring data from the device to the driver.
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