B3640 datasheet(3/6 Pages) EPCOS

3 / 6 page

Apr 04, 2001

SAW Components

B3640

238,0 MHz

Low-Loss Filter

Data Sheet

Characteristics

Operating temperature range:

TA = -5 - 75 ˚C

Terminating source impedance:

ZS = 200 Ω and matching network.

Terminating load impedance:

ZL = 50 Ω and matching network

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

min.

typ.

max.

Nominal frequency

—

238,0

—

MHz

Minimum insertion attenuation

min

8,5

9,5

(including matching network)

Amplitude ripple (p-p)

∆α

fN ± 100 kHz

—

0,3

1,1

fN ± 300 kHz

—

1,9

3,0

Absolute group delay

—

1,5

µs

Group delay variation

∆τ

fN ± 100 kHz

—

150

fN ± 300 kHz

—

250

Relative attenuation (relative to

min)

rel

fN ± 0,6 MHz ... fN ± 0,8 MHz

—

fN ± 0,8 MHz ... fN ± 1,8 MHz

—

fN ± 1,8 MHz ... fN ± 6,0 MHz

—

fN ± 6,0 MHz ... fN ± 20 MHz

—

fN ± 20 MHz ... fN ± 120 MHz

—

Temperature coefficient of frequency 1)

TCf

—

–0,036

—

ppm/K2

Turnover temperature

—30

—

˚C

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