Audio
Line Coupling/ Bridging Transformer
3858-X
3858 is a 1:1 line matching transformer with the following features:
• Low profile
• Small volume
• Conforming to FCC part 68, Canadian CS 03 regulations
• Low cost
• High insulation voltage
Applications:
Interfacing equipment to telephone line,
requiring small size and high insulation voltage.
3858-2 is designed for high
impedance bridging applications.
MECHANICAL AND SCHEMATIC
(All dimensions in inches)
3858
3858-1
3858-2, 3858-3
UNLESS OTHERWISE SPECIFIED, ALL TOLERANCES ARE ±0.010
ELECTRICAL SPECIFICATION @ 25 ˚C
Impedance
Insertion Loss
Frequency Response
Longitudinal Balance
DCR
Return Loss
Bridging Loss on 600
Ω
line
terminated with 10 KΩ at
the output
Dielectric Strength
(
Ω
)
( dB )
( dB )
( dB )
(
Ω
)
(
Ω
)
( dB )
( dB )
3858
600 : 600
@ 1000 Hz
< 1.0
300 – 3500 Hz
< 1.0
300 – 3500 Hz
> 65
Pri
57
Sec
57
300 – 3500 Hz
> 15
-
3858-1
600 : 600
< 1.0
< 1.0
> 65
57
57
> 15
-
3858-2
10 K : 10 K
< 0.5
< 0.5
> 65
250
250
-
< 0.25
3858-3
10 K : 10 K
< 0.5
< 0.7
> 65
125
125
-
< 0.25
3858-X
ISSUE: F
23/10/02
(Vrms)
4000
4000
2500
2500
229 Colonnade Road, Ottawa, Ontario, Canada K2E 7K3
Tel: (613) 226-1626 Fax: (613) 226-7124
www.filtran.com
An ISO 9001 Registered Company
PCB Design
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