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Vref Sigma Delta Adc

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11 Threads found on edaboard.com: Vref Sigma Delta Adc
This Source degeneration Gm-cell with negative-impedance-compensation(NIC) technique is used to design loop-filter for 2nd order sigma delta adc. I dont know what are the parameters/specifications needed for the design of the adc. Also i need input parameter values like Vsin, vref, Vss for this (...)
hello, :-xPost #1 this soluce is impossible ! delta +vref and -vref must be > 1,5Volt :smile:You can try MCP 3424 or 3421 adc delta sigma converter up to 18 bits i did a lot of test on it .. i get 2?V / point with 17 bits of resolution ( reference =2,048V) see code C18 and results on ea
hello All , I have a problem of getting the PSD plot of 2nd order switched cap sigma delta the opamps, switches are designed using veriloga. the input is taken every 0.1s using a reset switch on the9242792428 integration cap (incremental adc) vref= +-0.5 , vin=+-.216 (DC input) OSR = fs/2fo f
Hi there, I have heard that an internal adc used in the delta sigma (DS) adc is a low resolution one, but the internal DAC needs to be as accurate as the whole DS adc. Assume we want to design a 10-bit delta sigma with a 3-bit internal flash adc. we know (...)
I am working on sigma delta adc. how to plot transfer function for sigma delta adc using matlab . vref is 3 and Number of bits =16. OSR 128. A small example will be helpful thanks
HIGH I AM DESIGNING THE sigma delta adc AND I DONT KNOW HOW TO SET SPECIFICATIONS LIKE vref (REFERENCE) AND INPUT SWING FOR adc PLEASE HELP ME GUYS ...........::?::?:
For a 1st sigma-delta adc, max input voltage is 3v, reference voltage is 0.75V. Cs is the sample cap, Cf for the reference feedback cap. I found only when the relation below is true, the adc works normally: Vin_max *Cs=vref*Cf. That means Cs/Cf=1/4. Can some one give me an explanation? (...)
Hi, Need input on Incremental sigma delta adc.Suppose vref=1.0V and I need this case, the minimum converion time is 1.024mS considering 1MHz clock.Can I achieve the same 10-bit resoultion using say 100MHz if there is no restrcition on Power or in general what decides the maximum converation rate for incremental (...)
Hi to all, I would like to know what is the difference between ?vref, the common-mode of the modulator and the common-mode of the integrator's
hi all, I am a rookie of this board. Does anyone know what is the vref which in the attached Figure? and how many amplitude of vref? thank you Hi, The vref shown in the figure is the voltage associated with the feedback DAC. If the output of the comparator is high, +vref/2 is selected and fed back to the switched cap
thanks for your attention! I have sovled the problem. the amplitude of the source signal can't be 1, which equals to the vref. that will lead to the unstable state. but is that the rule of adc? for delta sigma adc, large input will overload the quantizer. the input range is often limited.