B39871-R2709-U310 datasheet(3/4 Pages) EPCOS

3 / 4 page

May 09, 2001

SAW Components

R 2709

868,30 MHz

Resonator

Data Sheet

Characteristics

Reference temperature:

TA = 25 ˚C

Terminating Source impedance:

ZS = 50 Ω

Terminating Load impedance:

ZL = 50 Ω

1) Temperature dependence of fc: fc(TA) = fc(T0)(1 + TCf(TA – T0)2)

min.

typ.

max.

Center frequency

868,10

868,30

868,50

MHz

(center frequency between 3 dB points)

Minimum insertion attenuation

min

—

7,0

9,0

Phase at fc

—

130

—

˚ el.

Loaded quality factor

3000

3600

—

Unloaded quality factor

5500

6600

—

Ageing of fc

——

−10/+40 ppm

Equivalent circuit elements

Motional capacitance

—

0,279

—

Motional inductance

—

120,4

—

µH

Motional resistance

—

100

—

Ω

Input / Output capacitance

—

1,9

—

Temperature coefficient of frequency 1)

TCf

—

–0,03

—

ppm/K2

Turnover temperature

—

˚C

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