B3891 datasheet(4/7 Pages) EPCOS

4 / 7 page

Feb 24, 2005

SAW Components

B3891

71,0 MHz

Low-Loss Filter

Data Sheet

Characteristics (extended temperature range)

Operating temperature range:

= -40 .. +85 ˚C

Terminating source impedance:

ZS = 200 Ω balanced and matching network

Terminating load impedance:

ZL = 200 Ω balanced and matching network

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

min.

typ.

max.

Nominal frequency

—

71,0

—

MHz

Minimum insertion attenuation

min

—

6,5

8,5

(including matching network)

Passband width

B1,0dB

250

290

—

kHz

rel ≤ 1 dB

Amplitude ripple (p-p)

∆α

fN ± 125 kHz

—

0,6

± 1,5

Absolute group delay (at

fN)

1,9

2,1

2,3

µs

Group delay ripple (p-p)

∆τ

fN ± 125 kHz

—

0,5

1,5

µs

Relative attenuation (relative to

min)

rel

fN ± 300

kHz ... fN ± 500

kHz

—

fN ± 500

kHz ... fN ± 700

kHz

—

fN ± 700

kHz ... fN ±

MHz

—

@ fN ± 800

kHz

—

fN ± 3

MHz ... fN ± 35

MHz

—

IM3 level

IM3

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

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

—

-95

dBm

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

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

—

-95

dBm

Temperature coefficient of frequency 1)

TCf

—

– 0,036

—

ppm/K2

Turnover temperature

—25

—

˚C

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