B39421-R2702-U310 datasheet(3/4 Pages) EPCOS

3 / 4 page

May 09, 2001

SAW Components

R 2702

418,05 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

417,975

418,050

418,125

MHz

(center frequency between 3 dB points)

Minimum insertion attenuation

min

—

9,2

10,5

Phase at fc

—

160

—

˚ el.

Loaded quality factor

5000

7200

—

Unloaded quality factor

8000

10200

—

Ageing of fc

——

±50

ppm

Equivalent circuit elements

Motional capacitance

—

0,15

—

Motional inductance

—

943

—

µH

Motional resistance

—

240

—

Ω

Input / Output capacitance

—

2,2

—

Temperature coefficient of frequency 1)

TCf

—

–0,03

—

ppm/K2

Turnover temperature

—

˚C

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