ADV7320 vs ADV734x / ADV739x for I2C port filter

Hi,

Are you asking about the loop filter for ADV7343 ? If so Please refer here https://ez.analog.com/video/f/q-a/115806/ext_lf-for-adv7343 for external loop filter component value.

Note: Generally the loop filter determines the PLL stability and also helps rejects jitter on the incoming clock. This is a
sensitive node and care must be taken with this pin in the PCB layout.

Thanks,

Poornima

Hi Poornima,

My question wasn't about PLL loop filter, just fir I2C port.

ADV7320 has functionality to limit input frequency band width on I2C port to avoid miss communication of I2Cin the noisy sytem.  It is can be enabled with ALSB. 

ADV7344 doesn't look to have similar filter and customer want to know the noise robustness of this part if the ADV7344 I2C port is enough robust than ADV7320. Could you confirm the bandwidth of ADV7344 I2C port? 

Below is the description about the filter of I2C port of ADV7320.  If ADV734x has similar band width, it look good for customer.

"When ALSB is set to 1, there is greater input bandwidth on the I2C lines, which allows high speed data transfers on this bus. When ALSB is set to 0, there is reduced input bandwidth on the I2C lines, which means that pulses of less than 50 ns do not pass into the I2C internal controller. This mode is recommended for noisy systems."

Keiichi@ADKK

Hi,

 ADV7344 doesn't look to have similar filter and customer want to know the noise robustness of this part if the ADV7344 I2C port is enough robust than ADV7320. Could you confirm the bandwidth of ADV7344 I2C port? 

   ADV734x part has noise robutness, Since it has DNR (Digital Noise Reduction) mode. Please refer datasheet about more details.

  400kHz( fast Mode) is the maximum I2C speeds of ADV734x.

Also note that here the slave address of the device depends on the device (ADV7342 or ADV7343), the operation (read or write), and the state of the ALSB pin (0 or 1), but not as like ADV7320.

Thanks,

Poornima

Hi,

 ADV7344 doesn't look to have similar filter and customer want to know the noise robustness of this part if the ADV7344 I2C port is enough robust than ADV7320. Could you confirm the bandwidth of ADV7344 I2C port? 

   ADV734x part has noise robutness, Since it has DNR (Digital Noise Reduction) mode. Please refer datasheet about more details.

  400kHz( fast Mode) is the maximum I2C speeds of ADV734x.

Also note that here the slave address of the device depends on the device (ADV7342 or ADV7343), the operation (read or write), and the state of the ALSB pin (0 or 1), but not as like ADV7320.

Thanks,

Poornima