2811B Datasheet, PDF (1/2 Pages) Bel Fuse Inc. – MODEM MAGNETICS V.90 Modem Transformer

MODEM MAGNETICS
V.90 Modem Transformer
TM00409
• Provides isolation and balance while minimizing signal • Designed to provide supplementary insulation at a
distortion and insertion loss in high speed modem
working voltage of 250V
applications
• Approved by UL, CSA and BABT
• Designed to match a 600Ω line to a 360Ω load
• Minimum interwinding breakdown voltage of 1500 Vrms
• Qualified per Bellcore TR-TSY-000357-1
ELECTRICAL SPECIFICATIONS at 25° C
Part
Number
Turns Ratio
± 2%
Insertion
Loss
dB
@ 1 kHz
Return Loss
dB
Frequency
Response
dB
200 Hz - 3500 Hz 100 Hz - 4 kHz
DCR
Ω
max
Harmonic
Distortion
dB
Longitudinal
Balance
dB
Pri
Sec -3dBm, 150 Hz 200 Hz - 3500 Hz
2811B
1:1
< 2.1
> 20
< 0.1
135
135
< -75
> 60
SCHEMATIC
2811B
1
6
3
Primary
4
Secondary
TYPICAL SPICE TRANSMISSION MODEL
120
6.2 mH
1
35 pF
120 k
3
120
40 H
6
35 pF
4
©2000 Bel Fuse Inc. Specifications subject to change without notice. 05.00
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
T4-19