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Part Number: DP83822I
My cusotmer are planning to use DP83822I and they have a few questions related to this PHY IC .
Q1.They are thinking to use YDK RJ-45 connector(Part# 46F-1305GYDNWZ2NL).www.link-pp.com/.../20180906103116261626.pdfIt has internal magnetics and it includes capacitors for each center tap(CT) of both PHY side and connector side.In DP83822I datasheet page.101, recommended transformers are listed in Table 138.These transformers don't have internal capacitors.Is transformers with capacitor not recommended? Should they change to other RJ-45 connector which don't have internal capacitor?
Q2.This question is related to above Q1.If they need to change the above RJ-45 connector,they are thinking to use J0026D01BNL(Manufacture:Pulse Electronics) and they want to know if this transformer could be use with DP83822.productfinder.pulseeng.com/.../J0026D01BNLFrom J0026D01BNL datasheet, transformer electrical specification are close to the Table 139 of DP83822I datasheet page.101. So, I guess this transformer could be used with DP83822I.Do you think this transformer could be used with DP83822I?I understand that this transformer haven't tested at TI so that the customer need to test themselves and decide if it could use with DP83822I.But if possible could you please give us an advise?
Q3.From DP83822I datasheet page.74 Table 69. Line Driver Control Register,it seems that we can select the swing of the driver.What are the cases of setting values other than default values?Is it a case such as long pattern wiring, noise concerns, suppressing heat generation etc?
Q4.Related to Q3.When setting the swing to 2.0V at 100Base-TX, does it mean that the differential peaks of TXD_P and TXD_N or RXD_P and RXD_N become 2.0V?
Q5.Related to Q4.Why there is no mention of "peak to peak" in the description of 10Base in Table 69?
Ethernet - Applications Engineer
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In reply to Ross Pimentel:
In reply to g.f.:
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