B39311-R771-U310 datasheet(4/5 Pages) EPCOS

4 / 5 page

Mar 03, 2004

SAW Components

R 771

314,875 / 315,125 MHz

Resonator

Data Sheet

Characteristics Resonator 2

Reference temperature:

TA = 25 ˚C

Terminating source impedance:

ZS = 50 Ω

Terminating Load impedance:

ZL = 50 Ω

min.

typ.

max.

Center frequency Resonator 21)

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

315,075

315,125

315,175 MHz

Frequency offset Resonator 2 to Resonator 1 foffset

200,0

250,0

300,0

KHz

Minimum insertion attenuation

min

—

1,3

1,6

Unloaded quality factor

9600

13200

—

Ageing of

——

± 50

ppm

Equivalent circuit elements

Motional capacitance

—

2,38

—

Motional inductance

—

107,32

—

µH

Motional resistance

—16

Ω

Parallel capacitance2)

2) If used in two port configuration (pin 3-input, pin 5-output)

C0 is reduced by approx. 0,3 pF.

C02

—

3,1

—

Temperature coefficient of frequency3)

3) Temperature dependence of

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

TCf

—

– 0,03

—

ppm/K2

Turnover temperature

0—

˚C

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