TFS525.doc

version 1.1

15.12.03

VI TELEFILTER

Preliminary specification

TFS 525

1/5

TELEFILTER GmbH

Potsdamer Stra

ße 18

D-14 513 TELTOW / Germany

Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30

E-Mail:

tft@telefilter.com

Measurement condition

Ambient temperature:

23

C

Input power level:

0

dBm

Terminating impedances at fc *: input: 87

// -8,4 pF (preliminary value)

output: 84

// -8,9 pF (preliminary value)

Characteristics

Remark:

Reference level for the relative attenuation arel of the TFS 525 is the attenuation at 525 MHz. The nominal frequency fN is fixed at 525 MHz

without tolerance. The centre frequency fc is the arithmetic mean value of the upper and lower frequencies at the 30 dB filter attenuation level

relative to the insertion loss ae. The given values for the relative attenuation arel and for the group delay ripple have to be reached at the

frequencies given below even if the centre frequency fc is shifted due to the temperature coefficient of frequency TCf in the operating temperature

range and due to a production tolerance for the centre frequency fc.

D a t a

typ. value

tolerance / limit

9,7

dB

max.

11

dB

(reference level)

Nominal frequency

-

525

MHz

Centre frequency

525

MHz

±

0,4

MHz

Passband

PB

-

2

MHz

Amplitude variation within PB

0,75 dB

max.

1,5

dB

Relative attenuation

3

MHz

0,2

dB

max.

1

dB

3

3,75

MHz

1,2

dB

max.

3

dB

50

MHz

40

dB

min.

30

dB

Group delay ripple

2,5

MHz

46

ns

max.

75

ns

20

ppm / K

-

Frequency deviation of fc over temperature T:

Operating temperature range

-

- 40

°C... +

85

°C

Storage temperature range

-

- 40

°C... +

85

C

*) The terminating impedances depend on parasitics and q-values of matching elements and the board used, and are to be understood as

reference values only. Should there be additional questions do not hesitate to ask for an application note or contact our design team.

generated

:

checked / approved

:

VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is

assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.