- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
I have a problem with my ADC-DAC.I create voltage with the ADC and print it on the LCD screen. I do this with the help of the variable i.The value i goes from 0 to the max value of DAC. The value selected in DAC is 0- 4.080V (1mV / bit)
i is rising up to 4080. but when I measure the voltage at the pin with the voltmeter, it varies from 0 to 3.15V (for example i = 0 ==> voltage = 0V, i = 4080 ==> voltage = 3.15V)
Does the voltmeter measure the value of 4.080V? How to fix this.
I want to measure the voltage on the resistor connected to the voltage divider with the DAC.but I can't see the voltage here on the lcd screen.
Solved! Go to Solution.
- Tags:
- adc delsig
- dac
- vdac
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello Burak,
Could you please check your VDDA voltage? The output voltage is actually VDDA-Compliance voltage. Where compliance voltage comes around ~1V. So if VDDA is 5V you will get 4.08V as the maximum output. But if the VDDA is a lesser value, the range also reduces accordingly. Please check the VDDA voltage in your system using a multi-meter and confirm this first.
Best Regards,
Vasanth
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello Burak,
Could you please check your VDDA voltage? The output voltage is actually VDDA-Compliance voltage. Where compliance voltage comes around ~1V. So if VDDA is 5V you will get 4.08V as the maximum output. But if the VDDA is a lesser value, the range also reduces accordingly. Please check the VDDA voltage in your system using a multi-meter and confirm this first.
Best Regards,
Vasanth
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content