TS635

8/10

CAPABILITIES

The table below shows the calculated compo-

nents

for different values of k. In this case

R2=1000

Ω and the gain=16dB. The last column

displays the maximum amplitude level on the line

regarding the TS635 maximum output capabilities

(18Vpp diff.) and a 1:2 line transformer ratio.

MEASUREMENT OF THE POWER

CONSUMPTION

Conditions:

Power Supply: 12V

Passive impedance matching

Transformer turns ratio: 2

Maximun level required on the line: 12.4Vpp

Maximum output level of the driver: 12.4Vpp

Crest factor: 5.3 (Vp/Vrms)

The TS635 power consumption during emission

on 900 and 4550 meter twisted pair telephone

lines: 360mW

Active matching

k

R1

(

Ω)

R3

(

Ω)

Rs

(

Ω)

TS635 Output

Level to get

12.4Vpp on

the line

(Vpp diff)

Maximum

Line level

(Vpp diff)

1.3

820

1500

3.9

8

27.5

1.4

490

1600

5.1

8.7

25.7

1.5

360

2200

6.2

9.3

25.3

1.6

270

2400

7.5

9.9

23.7

1.7

240

3300

9.1

10.5

22.3

Passive matching

12.4

18