TFS912 参数 Datasheet PDF下载

Tfs912.doc

version 1.2

02.07.2002

VI

TELEFILTER

Measurement condition

Ambient temperature:

Input power level:

Terminating impedances*

for input:

for output:

23

0

°C

dBm

Filter Specification

TFS 912

1/5

190

Ω

// -0.15 pF

190

Ω

// -0.15 pF

Characteristics

Remark:

Reference level for the relative attenuation arel of the TFS 912 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 fc is the arithmetic mean value of the upper and lower frequencies at

the -3 dB filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed at 912,5 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.

Data

Insertion loss

(Reference level)

Nominal frequency

Centre frequency

2 dB Bandwidth

3 dB Bandwidth

Pass band ripple

Relative attenuation

f

N

– 117,5 MHz .... f

N

f

N

+ 117,5 MHz .... f

N

f

N

+ 257,5 MHz .... f

N

f

N

+ 302,5 MHz .... f

N

ae = amin

fN

fc

typ. value

3,85

-

912,5

54,3

57,7

1.8

dB

dB

dB

dB

-

-

MHz

MHz

MHz

dB

min.

min.

min.

min.

dB

tolerance/limit

max.

5,0

912,5

dB

MHz

BW

BW

within

±

22,5 MHz

arel

– 812,5 MHz

+ 257,5 MHz

+ 302,5 MHz

+ 587,5 MHz

47,0

50,0

50,0

50,0

-

min.

max.

40,0

30,0

45,0

40,0

45,0

3,0

dB

dB

dB

dB

MHz

dB

Operating temperature range

Storage temperature range

Temperature Coefficient

- 25

°C

... + 75

°C

- 30 °C ... + 80 °C

TC

- 72 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

Potsdamer Straße 18

D 14 513 TELTOW / Germany

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

E-Mail:

tft@telefilter.com

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.