B39321-R822-H210 datasheet(3/4 Pages) EPCOS

3 / 4 page

Dec 07, 2004

SAW Components

R 822

319,508 MHz

Resonator

Data Sheet

Characteristics

Reference temperature:

TA = 25 ˚C

Terminating source impedance:

ZS = 50 Ω

Terminating load impedance:

ZL = 50 Ω

1) Center frequency is defined as maximum of the real part of the admittance

2) If used in two port configuration (pin 1-input, pin 3-output) C0 is reduced by approx. 0,3 pF.

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

min.

typ.

max.

Center frequency 1)

319,433

319,508

319,583 MHz

Minimum insertion attenuation

min

—

1,5

1,9

Unloaded quality factor

8500

11000

—

Ageing of

—

–50/+50 ppm

Equivalent circuit elements

Motional capacitance

—

2,145

—

Motional inductance

—

115,70

—

µH

Motional resistance

—19

Ω

Parallel capacitance 2)

—

2,70

—

Temperature coefficient of frequency 3)

TCf

—

–0,032

—

ppm/K2

Turnover temperature

20—50

˚C

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