Other Parts Discussed in Thread: AMC1035,
What is the reference voltage to be considered for error/accuracy calculation? Is it 1.25V (clipping voltage) or 2.5V?
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What is the reference voltage to be considered for error/accuracy calculation? Is it 1.25V (clipping voltage) or 2.5V?
Hi Saraswathy,
You need to use the clipping voltage level = +/-1.25, which is in the end 2.5V.
OK, so this means 1LSB = 1.25V/(2^n-1). (n=16 bit)
How do we compute the gain and offset errors for AMC1035. I see the values are given in the datasheet on errors and their thermal drift. But is gain error considered as a multiplying factor or is it just added with other errors to compute the net error.
Do you have any reference documents that explains the error estimation using AMC1035-Q1. Pls support on this.
But on this thread,- (+) AMC1035: offset and refernece - Data converters forum - Data converters - TI E2E support forums , the reference voltage is said to be 2.5V. Pls clarify this again.
As I said in my initial reply, you need to use the clipping voltage which is +/-1.25V. From -1.25 to +1.25, the input range is 2.5V, which is what you found in the other forum post. Gain error is a multiply factor, offset is additive. There is a video explaining gain and offset errors here: https://www.ti.com/video/series/precision-labs/ti-precision-labs-analog-to-digital-converters-adcs.html
Look for "Understanding and calibrating the offset and gain for ADC systems" under the Error sources topic.