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R771

SAW Components Resonator

EPCOS AG 

SAW Components

Resonator

Data Sheet

Characteristics Resonator 1

Reference temperature:

Terminating source impedance:

Terminating Load impedance:

Center frequency Resonator 11)

R 771

314,875 / 315,125 MHz

TA = 25 ˚C

ZS = 50 Ω

ZL = 50 Ω

min.

typ.

max.

fc

314,825 314,875 314,925 MHz

Frequency offset Resonator 2 to Resonator 1 foffset 200,0 250,0 300,0 KHz

Minimum insertion attenuation

Unloaded quality factor

αmin

—

1,3

QU

9600 13200

Ageing of fc

—

—

Equivalent circuit elements

Motional capacitance

Motional inductance

Motional resistance

Parallel capacitance2)

Temperature coefficient of frequency3)

Turnover temperature

C1

—

2,39

L1

—

106,94

R1

—

16

C01

—

3,1

TCf

—

– 0,03

T0

0

—

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

2) If used in two port configuration (pin 1-input, pin 7-output) C0 is reduced by approx. 0,3 pF.

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

1,6 dB

—

± 50 ppm

— fF

— µH

22 Ω

— pF

— ppm/K2

30 ˚C

3 Mar 03, 2004

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