Datasheet > TFS121-SAW-Filter

TFS121-SAW-Filter

更新时间： 2024-10-01 14:53:55

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Surface Acoustic Wave (SAW) devices are compact, cost competitive radio frequency (RF) solutions t

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Filename: tfs 121.doc

Version 3.0

19.01.2011

Microchip

Filter specification

TFS 121

1/5

Measurement condition

Ambient temperature:

Input power level:

Terminating impedance: *

Input:

23

dBm

1530  II –1,57 pF

Output:

Characteristics

Remark:

Reference level for the relative attenuation a

of the TFS121 is the minimum of the pass band attenuation a

. The minimum of the pass band

min

rel

attenuation a

is defined as the insertion loss a . The centre frequency f is the arithmetic mean value of the upper and lower frequencies at the 3dB

min

e c

filter attenuation level relative to the insertion loss a . The nominal frequency f is fixed at 121,5 MHz without tolerance. The given values for the relative

attenuation a

temperature coefficient of frequency TC in the operating temperature range and due to a production tolerance for the centre frequency f .

and for the group delay ripple have to be reached at the frequencies given below even if the centre frequency f is shifted due to the

rel

D a t a

typ. value

tolerance / limit

= a

min

Insertion loss

3,75

max.

(reference level)

Nominal frequency

Centre frequency

f_N

f_C

121,5

MHz

121,5

MHz

Relative attenuation

rel

f_N

... f_N

kHz

1,5

max.

min.

f_N

125

455

kHz ... f_N

kHz

455

Operating temperature range

Storage temperature range

OTR

- 40°C ... + 85 °C

- 53°C ... + 100 °C

Temperature coefficient of frequency

Frequency inversion temperature

TC **

- 0,036 ppm/K²

25 °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.

**) f (Hz) = Tc_f(ppm/K) x (T - T_o)² x f_To(MHz)

Generated:

Checked / Approved:

Microchip Frequency Technology GmbH

Potsdamer Straße 18

D 14 513 TELTOW / Germany

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

Microchip Frequency Technology GmbH 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.

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