P1165

ETALDOC 78/22

Page 2 of 5

February 2006

SPECIFICATIONS

Electrical

At T = 25ºC and as circuit fig. 2 unless otherwise stated.

Parameter

Conditions

Min

Typ

Max

Units

Insertion Loss

-

-

1.5

dB

Frequency response

LF-3dB cutoff

HF-3dB cutoff

200Hz - 4kHz

-

-

-

30

15

-

-

-

±0.2

Hz

kHz

dB

Return Loss

200Hz - 4kHz

18

-

-

dB

Distortion

(1)

0dBm in line, 3

f = 600Hz

f = 450Hz

-

-

-76

-75

-72

-70

dBm

dBm

Balance

DC – 5kHz

Method TG25

80

-

-

dB

Saturation

Excitation 50Hz

250V rms.

Output voltage

across line

-

-

-

-

10

65

V rms

V peak

Voltage

isolation

(2)

50Hz

DC

3.88

5.5

-

-

-

-

kVrms

kV

Operating range:

Functional

Storage

Humidity

Ambient temperature

-25

–40

-

-

-

-

+85

+125

95

ºC

ºC

%R.H.

Lumped equivalent circuit parameters as Fig. 1

(3)

Sum of windings

108

-

132

Ω

Leakage inductance

ΔL

6.5

-

7.5

mH

Shunt inductance Lp

(4)

100mV 200Hz

100mV 1kHz

2.25

-

4

2.5

10

-

H

H

Shunt loss Rp

(4)

10mV 200Hz

10mV 1kHz

8

12

-

-

-

-

k

Ω

k

Ω

Notes

1.

Third

harmonic

typically

exceeds

other

harmonics by 20dB.

2.

Components are 100% tested at 6.5kV DC.

3.

Caution: do not pass DC through windings.

Telephone line current, etc. must be diverted

using choke or semiconductor line hold

circuit.

4.

At signal levels greater than 100mV, Lp will

increase and Rp will decrease slightly but the

effect is usually favourable to the return loss

characteristic.

Equivalent Circuit

Fig . 1

IDEAL

1:1

LINE

EQUIPMENT

½ L

½ L

½ R

½ R