B3839 Просмотр технического описания (PDF) - EPCOS AG

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B3839

SAW Components Low-Loss Filter

EPCOS AG 

SAW Components

Low-Loss Filter

Data Sheet

Characteristics

Operating temperature range:

Terminating source impedance:

Terminating load impedance:

B3839

333,0 MHz

TA = -40 ... 85 ˚C

ZS = 50 Ω and external matching network

ZL = 50 Ω and external matching network

Center frequency

fc

αrel = 3,0 dB

min.

typ.

max.

332,88 333,0 333,12 MHz

Minimum insertion attenuation

αmin

—

6,5

8 dB

Passband width

αrel ≤ 3,0 dB B3,0dB 900

αrel ≤ 20,0 dB B20dB

—

αrel ≤ 30,0 dB B30dB

—

αrel ≤ 40,0 dB B40dB

—

αrel ≤ 50,0 dB B50dB

—

1010

1840

2080

2250

4500

1045 kHz

2000 kHz

2250 kHz

2500 kHz

— kHz

Relative attenuation (relative to αmin)

αrel

fc − 50,0 MHz ... fc − 3,0 MHz

48

50

— dB

fc + 3,0 MHz ... fc + 20,0 MHz

47

50

— dB

fc + 20,0 MHz ... fc + 40,0 MHz

44

48

— dB

fc + 40,0 MHz ... fc + 50,0 MHz

48

50

— dB

Amplitude ripple (p-p)

∆α

fc ± 0,4 MHz

—

0,5

1,0 dB

Absolute group delay (at fc)

τ

—

0,9

— µs

Group delay ripple (p-p)

∆τ

fc ± 0,4 MHz

—

430

500 ns

Reflected Wave Signal Suppression

12 µs ... 20 µs after main pulse

70

80

— dB

Temperature coefficient of frequency 1)

Turnover temperature

TCf

—

T0

—

–0,036 — ppm/K2

15

— ˚C

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

3 Jan 08, 2002

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