Ethernet design using RJ-45 with integrated magnetics

Applicable receivers: BD970

The ethernet interface can be implemented with a single part by using an integrated part like TE Connectivity’s 6605767-1 which has magnetics, common mode choke, termination and transient voltage suppression fully integrated in one part.

RJ-45 drawing

JX10-0006NL schematic

Electrical characteristics

Parameter	Specifications
Insertion loss	100 kHz	1 to 125 MHz
Insertion loss	-1.2 dB max.	-0.2 to 0.002*f^{^1.4 db max.}
Return loss (Z out = 100 Ohm +/- 15%)	0.1 to 30 MHz: 30 to 60 MHz: 60 to 80 MHz:	-16 dB min. -10+20*LOG₁₀ (f/60 MHz dB min.) -10 dB min.
Inductance (OCL) (Media side -40°C + 85°C)	350 uH min.	Measured at 100 kHz, 100 mVRMS and with 8 mA DC bias)
Crosstalk, adjacent channels	1 MHz	10 to 100 MHz
Crosstalk, adjacent channels	-50 dB min.	-50+17*LOG₁₀(f/10) dB min.
Common mode rejection radio	2 MHz	30 to 200 MHz
Common mode rejection radio	-50 dB min.	-15+20*LOG₁₀ (f/200) dB min.
DC resistance ½ winding	0.6 Ohms max.
DC resistance imbalance	± 0.065 Ohms max. (center tap symmetry)
input - output isolation	1500 VRMS min. at 60 seconds