Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
05/15/06 15:00
Read: times


 		 #116228 - Why do I need a diode.
Responding to: ???'s previous message
Dear Kai,

Why do I need a diode from AVcc to +5V? I am using LM336-2.5 that will always give +2.5 with refrence to AGND [ DGND too ]. This is within ratings of ADC input. Please expalin why is the diode needed.

thanks & Regards,
Prahlad Purohit

List of 42 messages in thread
TopicAuthorDate
Battery powered hand hel mixed signal            01/01/70 00:00      
   Be prepared to make a mistake            01/01/70 00:00      
      Re: Prepared to make a mistake            01/01/70 00:00      
         We're all learning            01/01/70 00:00      
   Some points...            01/01/70 00:00      
      Re: Some Points.            01/01/70 00:00      
         Answers            01/01/70 00:00      
            Re: Answers.            01/01/70 00:00      
               then...            01/01/70 00:00      
                  How much error can it cause.            01/01/70 00:00      
                     Negligible            01/01/70 00:00      
      10uH inductor + 100n            01/01/70 00:00      
         No big time delay is allowed            01/01/70 00:00      
   Modified as per suggestions.            01/01/70 00:00      
      No Cap At SV1.            01/01/70 00:00      
         Voltage drops?            01/01/70 00:00      
            Drop only 0.16V*2=0.32V            01/01/70 00:00      
               F+5V ?            01/01/70 00:00      
                  Re: F+5V & F-5V            01/01/70 00:00      
                     Good, that I aksed...            01/01/70 00:00      
                        Re: What else need changes            01/01/70 00:00      
                        why r7 to avcc.            01/01/70 00:00      
                           Ok            01/01/70 00:00      
                              Re: Capacitor with LM336            01/01/70 00:00      
                              You could do...            01/01/70 00:00      
                                 re: you could do.            01/01/70 00:00      
                                    What I meant            01/01/70 00:00      
                                       re: what i meant.            01/01/70 00:00      
                                          Present layout            01/01/70 00:00      
                                             Additionally...            01/01/70 00:00      
                              How do i connect protection diode to AVc            01/01/70 00:00      
                                 Like D3            01/01/70 00:00      
                                    Why do I need a diode.            01/01/70 00:00      
                                       credit for design            01/01/70 00:00      
                                          Thanks!            01/01/70 00:00      
                                       From ADC7-input to AVCC            01/01/70 00:00      
         Is needed            01/01/70 00:00      
            Re: Cap needed.            01/01/70 00:00      
   Modified final layouts.            01/01/70 00:00      
   I fixed your layout            01/01/70 00:00      
      Looks nice...            01/01/70 00:00      
   Design sent for PCB making            01/01/70 00:00      

Back to Subject List