Input Capacitance of ADV7403

Hi,

  CAPY1, CAPY2, CAPC1, and CAPC2 are part of the ADC capacitor network. The values of these capacitors can be found in the "ADV7403 Typical Connection Diagram" on Page 19 of the ADV7403 datasheet.

  Also here i have attached schematic ADV7401-3_a_Sch.pdf

  Kindly note that, ADV7403 is not recommended for new designs(NRND).

Thanks,

Poornima S

In the TYPICAL CONNECTION DIAGRAM, large capacitors are shown (for example, 100 nF).

Hi,

  I don't see the 100 nF capacitor value in the typical connection diagram. Please let me know where it is specified?

  Regarding NRND, Kindly refer here  Product Life Cycle Information | Analog Devices  . The part may be planned for End-of-Life (EOL), which could be the reason it has been classified as Not Recommended for New Designs (NRND).

Thanks,

Poornima S

My mistake - 10uF (The bigger one that most effect on the equal capacitance)..its more problematic because it is adding significant pole.

Anyway, this 10uF is not usual input capacitance, hence I suggest examining this issue. 

Thanks.

Hi,

  Please refer this thread  CVDD's bypass capacitor of ADV7611   Bypass capacitor's values of ADV7611. 

  Here our expert has given some suggestion about the impact of capacitance .

Thanks,

Poornima S

Hi,

I will try to clarify my misunderstanding again - I asked about the Input capacitance on Analog Inputs Pins..the DS define only input impedance (I guess it is the resistance) of 10Mega Ohm : 

but what is the input capacitance of those pins?

Thanks!

Omer

Hi,

  Please refer to this IBIS file ez.analog.com/.../0523.ADV7403_5F00_IBIS_5F00_Models.zip and let us know whether you are able to obtain sufficient information regarding the signal names and their corresponding electrical minimum and maximum specifications.

Thanks,

Poornima S