Timeline for ADC CS5532: "digital gain scaling" - ADC Calibration without full scale signal
Current License: CC BY-SA 4.0
18 events
| when toggle format | what | by | license | comment | |
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| Dec 15, 2022 at 16:05 | answer | added | user1850479 | timeline score: 1 | |
| Dec 15, 2022 at 10:20 | history | edited | Carmine Zagaria | CC BY-SA 4.0 |
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| Dec 14, 2022 at 16:50 | history | edited | Carmine Zagaria | CC BY-SA 4.0 |
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| Dec 14, 2022 at 16:48 | comment | added | Carmine Zagaria | To calibrate the adc cs5532, I must supply the converter’s calibration signals which represent ground and full scale, and in this case, i could use the system calibration (cs5532 native function) that compute gain and offset register automatically. I have a sample weight and i dont have the full scale signal. So I have to manually write the gain register and i dont understand the relationship between input signal and the gain register value. So, how can i compute the gain register value given input adc value computed by sample weight in percentage? | |
| Dec 14, 2022 at 16:31 | comment | added | user1850479 | It is not clear what you are asking. Could you edit your question to explain what you know and what you are trying to calculate? | |
| Dec 14, 2022 at 16:12 | comment | added | Carmine Zagaria | I dont know the digital value beign input to the gain register, this is my goal. I have to calculate the gain register value given ADC binary value (maximum capacity) without full scale signal is applied. | |
| Dec 14, 2022 at 15:42 | comment | added | user1850479 | Use the digital value being input to the gain register in your calculation, not the analog voltage. For example, if the digital value is 1, and the output you want is 8, set the gain to 8 using the formula you posted. | |
| Dec 14, 2022 at 14:38 | comment | added | Carmine Zagaria | The input value in the ADC is the voltage in mV and my output is a 24 bit data in two's complement format. When i go to divide (adc value) / (input-mV), this is not correspond to the gain register value format that is a number spans from 0 to (64 - 2^-24) | |
| Dec 14, 2022 at 14:07 | comment | added | user1850479 | The gain register is multiplied times the input to get the output, correct? If you know the maximum input and you have the maximum output value you want, then you would divide one by the other to get the gain value. | |
| Dec 14, 2022 at 11:15 | history | edited | Carmine Zagaria | CC BY-SA 4.0 |
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| Dec 14, 2022 at 11:11 | history | edited | toolic | CC BY-SA 4.0 |
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| Dec 14, 2022 at 11:03 | comment | added | Carmine Zagaria | I don't understand the relationship between the gain register value and scale maximum capacity. how do i have to valorize the gain register value relative maximum capacity? the gain register value spans from 0 to (64 - 2^-24) | |
| Dec 14, 2022 at 10:34 | comment | added | Kartman | What’s stopping you from applying your own scaling? | |
| Dec 14, 2022 at 9:28 | history | edited | Carmine Zagaria | CC BY-SA 4.0 |
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| Dec 14, 2022 at 8:35 | history | edited | Carmine Zagaria | CC BY-SA 4.0 |
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| Dec 14, 2022 at 8:34 | history | edited | Carmine Zagaria | CC BY-SA 4.0 |
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| S Dec 14, 2022 at 8:34 | review | First questions | |||
| Dec 14, 2022 at 11:11 | |||||
| S Dec 14, 2022 at 8:34 | history | asked | Carmine Zagaria | CC BY-SA 4.0 |