B4874 datasheet(4/7 Pages) EPCOS

4 / 7 page

May 08, 2001

SAW Components

B4874

85,38 MHz

Low Loss Filter for Mobile Communication

Data Sheet

Characteristics

Operating temperature range:

= -30˚C ... 85˚C

Terminating source impedance:

ZS = 1000 Ω || 2600 nH

Terminating load impedance:

ZL = 1000 Ω || 2600 nH

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

min.

typ.

max.

Nominal frequency

—

85,38

—

MHz

3 dB Bandwidth

+-14

—

kHz

Minimum insertion attenuation

min

—

3,0

4,5

(including losses in the matching network)

Amplitude ripple (p-p)

∆α

fN –

12,0 kHz ... fN +

12,0 kHz

—

0,3

1,5

Group delay ripple (p-p)

∆τ

fN –

12,0 kHz ... fN +

12,0 kHz

—

3,0

10,0

µs

Relative attenuation (relative to

min)

rel

fN ±

14,0 kHz

—

0,5

3,0

fN ±

60,0 kHz ... fN ± 120,0 kHz

—

fN ± 120,0 kHz

—

fN ± 120,0 kHz ... fN ±

2,5 MHz

—

Impedance within the passband

Input:

ZIN

RIN

CIN

—

1000 || 1,4

—

Ω || pF

Output:

ZOUT = ROUT || COUT

—

1000 || 1,4

—

Ω || pF

Temperature coefficient of frequency 1)

TCf

—

– 0,036

—

ppm/K2

Turnover temperature

—25

—

˚C

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