B3891 Просмотр технического описания (PDF) - EPCOS AG

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B3891

SAW Components Low-Loss Filter

EPCOS AG 

SAW Components

B3891

Low-Loss Filter

71,0 MHz

Data Sheet

Characteristics (extended temperature range)

Operating temperature range:

Terminating source impedance:

Terminating load impedance:

T = -40 .. +85 ˚C

ZS = 200 Ω balanced and matching network

ZL = 200 Ω balanced and matching network

Nominal frequency

min.

typ.

max.

fN

—

71,0

— MHz

Minimum insertion attenuation

(including matching network)

αmin

—

6,5

8,5 dB

Passband width

αrel ≤ 1 dB

B1,0dB 250

Amplitude ripple (p-p)

∆α

fN ± 125 kHz

—

Absolute group delay (at fN)

τN

1,9

Group delay ripple (p-p)

∆τ

fN ± 125 kHz

—

Relative attenuation (relative to αmin)

αrel

fN ± 300 kHz ... fN ± 500 kHz

12

fN ± 500 kHz ... fN ± 700 kHz

30

fN ± 700 kHz ... fN ± 3 MHz

39

@ fN ± 800 kHz

41

fN ± 3 MHz ... fN ± 35 MHz

43

IM3 level

IM3

f1 = fN- 0,8 MHz, input power -14 dBm

f2 = fN- 1,6 MHz, input power -14 dBm

@fN

—

f1 = fN+ 0,8 MHz, input power -14 dBm

f2 = fN+1,6 MHz, input power -14 dBm

@fN

—

290

0,6

2,1

0,5

18

35

45

45

60

—

—

— kHz

± 1,5 dB

2,3 µs

1,5 µs

— dB

— dB

— dB

— dB

— dB

-95 dBm

-95 dBm

Temperature coefficient of frequency 1)

Turnover temperature

TCf

—

T0

—

– 0,036 —

25

—

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

ppm/K2

˚C

4 Feb 24, 2005

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