Apr 15, 2021
07:02 PM
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Apr 15, 2021
07:02 PM
Hi,
Im using the the Delta sigma demodulator with an external DSD that has ±250-mV input range. I have the clock and dout connected to a DSD IC and I'm having trouble reading a full scale voltage.
Im injecting a 500mV Vpp , 1 Hz, 0V offset sine wave and the largest value I read is 220mV Volts.
My understanding of how to calculate volts:
CIC = 32. Filter = Sinc3
Meaning that Vout = dsd result * ( 0.250 / 2^15)
Meaning that at 250 mV I would have 32768 * (1.0 / 2^15)
Can I get confirmation that my understanding is correct of how to convert counts to a voltage reading ?
Im using the the Delta sigma demodulator with an external DSD that has ±250-mV input range. I have the clock and dout connected to a DSD IC and I'm having trouble reading a full scale voltage.
Im injecting a 500mV Vpp , 1 Hz, 0V offset sine wave and the largest value I read is 220mV Volts.
My understanding of how to calculate volts:
CIC = 32. Filter = Sinc3
Meaning that Vout = dsd result * ( 0.250 / 2^15)
Meaning that at 250 mV I would have 32768 * (1.0 / 2^15)
Can I get confirmation that my understanding is correct of how to convert counts to a voltage reading ?
- Tags:
- delta sigma
- dsd
- IFX
- xmc
1 Reply
Apr 19, 2021
09:56 PM
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Apr 19, 2021
09:56 PM
Hi,
Could you let us know how you are using the DSD ? Are you using the DS_ADC_DEMOD App ? Could you share the code snippet or configuration information? Additionally what external DSD are you using ?
Best Regards,
Vasanth
Could you let us know how you are using the DSD ? Are you using the DS_ADC_DEMOD App ? Could you share the code snippet or configuration information? Additionally what external DSD are you using ?
Best Regards,
Vasanth