B4540 datasheet(4/6 Pages) EPCOS

4 / 6 page

Apr 04, 2001

SAW Components

B4540

112,32 MHz

Bandpass Filter for Mobile Communication

Data Sheet

Characteristics

Operating temperature range:

= -40 to + 85 ˚C

Terminating source impedance:

ZS = 1,1 kΩ || 390 nH

Terminating load impedance:

ZL = 0,9 kΩ || 340 nH

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

Matching network to 50

Ω (element values depend on pcb layout)

min.

typ.

max.

Nominal frequency

—

112,32

—

MHz

Insertion attenuation at

—

13,5

15,0

(including losses in matching network)

Reference level for the following data

Pass bandwidth

3dB

—

1,6

—

MHz

Group delay ripple (p-p)

∆τ

fN -700,0 kHz .. fN+700,0 kHz

—

100

150

Relative attenuation (relative to

rel

fN − 30,00 MHz ... fN − 6,32 MHz

—

fN − 6,32 MHz ... fN − 4,00 MHz

—

fN − 4,00 MHz ... fN − 1,72 MHz

—

fN + 1,72 MHz ... fN + 4,00 MHz

—

fN + 4,00 MHz ... fN + 6,00 MHz

—

fN + 6,00 MHz ... fN + 8,00 MHz

—

fN + 8,00 MHz ... fN + 30,00 MHz

—

fN + 17,28 MHz

—

Impedance at

Input:

ZIN

RIN

CIN

—

3,9 || 5,0

—

Ω || pF

Output:

ZOUT = ROUT || COUT

—

3,3 || 6,1

—k

Ω || pF

Temperature coefficient of frequency 1)

TCf

—

– 0,03

—

ppm/K2

Turnover temperature

—30

—

˚C

Ls1 = 330 nH

Ls2 = 270 nH

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