Hi Team,
We would like to confirm the DeEmphasis gain and the output swing.
It seems the SN75LVCP601 datasheet seems to have a typo in the "Diff VppTX_DE" parameter.
Isn't the swing value opposite for DEx=0 and DEx=1 ? DEx=0 should be 830mV, DEx=1 should be 550mV.
Best Regards,
Kawai
Hi,
Here are the measurement values I get in the lab.
DE = 0 VOD Diff Tx = 500 mV VOD Diff Tx DE = 500 mV (-0 dB)
DE = 1 VOD Diff Tx = 850 mV VOD Diff Tx DE = 670 mV (-2 dB)
DE = float VOD Diff Tx = 840 mV VOD Diff Tx DE = 525 mV (-4 dB)
The DE values in dB gain are correct.
The differential VOD numbers are confusing. Their is a mix of DiffVppTX_DE and DiffVpp_TX reported.
The DE=0 value is correct
The DE=1 value should be under the DiffVppTX specification as shown in Figure 5 below.
The typical data for DiffVppTX_DE with DE = float is not accurate.
Regards,
Lee
Hi Lee-san,
I summarized your measurement result.
Here is the datasheet electrical characteristics.
I understood that the De-Emphasis Gain is correct, however, is the amplitude described here is "Diff vppTX" instead of "Diff VppTX_DE" though there is still a typo for the value when floating ?
Best Regards,
Kawai
Hi Lee-san,
There seems to be a typo for DE=1 setting, too. I believe the datasheet should be corrected as below.
Best Regards,
Kawai
