Filename: tfs 454.doc

Version 1.2

16.04.2004

Filter specification

TFS 454

1/5

Tele Filter 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

23

°C

Input power level:

0 dBm.

Terminating impedances :

100

// -4,0 pF

100

// -4,0 pF

Characteristics

Remark:

Reference level for the relative attenuation arel of the TFS 454 is the minimum of the pass band attenuation amin. The minimum of the pass band

attenuation amin is defined as the insertion loss ae. The centre frequency fo is the arithmetic mean value of the upper and lower frequencies at the 3dB

filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed at 454,00 MHz without tolerance. 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

Insertion loss

ae= amin

3,5

MHz

max.

4,5

MHz

(reference level)

-

-

Nominal frequency

454

MHz

Centre frequency

454

MHz

Bandwidth

BW

9,5

MHz

min.

4,0

MHz

Relative attenuation

arel

-

42,8

MHz

60

dB

min.

55

dB

Operating temperature range

OTR

-

- 10

°C ... + 50°C

Storage temperature range

-

- 40

°C ... + 85°C

Temperature coefficient of frequency

TCf **

-32

ppm/K

*) 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.