78Q2132 Просмотр технического описания (PDF) - TDK Corporation

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78Q2132

1/10BASE-T HomePNA/Ethernet Transceiver

TDK Corporation 

78Q2132

1/10BASE-TX

HomePNA/Ethernet Transceiver

ELECTRICAL SPECIFICATIONS (continued)

10BASE-T ISOLATION TRANSFORMERS

Two simple isolation transformers are all that are required at the line interface, but transformers with integrated

common-mode choke are recommended for exceeding FCC requirements. This table gives the recommended

line transformer characteristics:

NAME

Turns Ratio

Open-Circuit Inductance

Leakage Inductance

Inter-Winding Capacitance

D.C. Resistance

Insertion Loss

HIPOT

Tx VALUE

1.414 CT : 1 CT ± 5%

350 uH (min)

0.40 uH (max)

12 pF (max)

0.9 Ω (max)

1.1 dB (typ)

1500 Vrms

Rx VALUE

1 CT : 1 CT ± 5%

350 uH (min)

0.40 uH (max)

12 pF (max)

0.9 Ω (max)

1.1 dB (typ)

1500 Vrms

CONDITION

@ 10 mV, 10 kHz

@ 1 MHz (min)

0 – 100 MHz

HomePNA ISOLATION TRANSFORMER

A simple 1:1 isolation transformer with integrated series capacitor in the primary is required at the line interface,

but transformers with integrated common-mode choke are recommended for exceeding FCC requirements. This

table gives the recommended line transformer characteristics:

NAME

Turns Ratio

Open-Circuit Inductance

Leakage Inductance

Inter-Winding Capacitance

D.C. Resistance

Insertion Loss

HIPOT

Series C at line side

VALUE

1 CT : 1 CT ± 5%

140 uH (min)

2.0 uH (max)

6 pF (max)

0.25 Ω (max)

1.1 dB (typ)

2000 Vrms

0.001uF @ 2000v

CONDITION

@ 100 mVRMS, 100 KHz

@ 1 MHz (min)

0 – 100 MHz

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