B39801-R2712-U310 datasheet(3/4 Pages) EPCOS

3 / 4 page

Oct 02, 2003

SAW Components

R2712

804.50 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

804,25

804.5

804,75

MHz

(center frequency between 3 dB points)

Minimum insertion attenuation

min

—

6,3

8,3

Phase at fc

—

140

—

˚ el.

Loaded quality factor

3000

3700

—

Unloaded quality factor

6300

7500

—

Ageing of fc

——

−10/+40 ppm

Equivalent circuit elements

Motional capacitance

—

0,293

—

Motional inductance

—

133,8

—

µH

Motional resistance

—91—

Ω

Input / Output capacitance

—

1,6

—

Temperature coefficient of frequency 1)

TCf

—

–0,03

—

ppm/K2

Turnover temperature

—

˚C

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