B3553 datasheet(3/6 Pages) EPCOS

3 / 6 page

May 09, 2001

SAW Components

B3553

303,80 MHz

Low-loss Filter

Data Sheet

Characteristics

Reference temperature:

TA = 25 ˚C

Terminating source impedance:

ZS = 50 Ω and matching network

Terminating load impedance:

ZL = 50 Ω and matching network

1)Temperature dependence of fC: fC(TA) = fC(T0) (1 + TCf(TA – T0)2)

2) Impedance for passband matching bases on an ideal, perfect matching of the SAW filter to

source- and to load impedance (here 50 Ohm). After the SAW filter is removed and input imped-

ance into the input matching / output matching network is calculated.

The conjugate complex value of these characteristic impedances are the input and output imped-

ances for flat passband. For more details, we refer to EPCOS application note #4.

min.

typ.

max.

Center frequency

—

303,80

—

MHz

(center frequency between 3 dB points)

Minimum insertion attenuation

min

303,62 ... 303,98 MHz

—

3,0

4,5

Pass band (relative to

min)

303,62 ... 303,98 MHz

—

1,0

2,0

303,595 ... 304,005MHz

—

1,0

3,0

303,53 ... 304,07 MHz

—

1,5

6,0

Relative attenuation (relative to

min)

rel

10,00 ... 260,00 MHz

—

260,00 ... 297,00 MHz

—

297,00 ... 302,80 MHz

—

304,80 ... 320,00 MHz

—

320,00 ... 400,00 MHz

—

400,00 ...1000,00 MHz

—

Impedance for pass band matching 2)

Input:

ZIN

RIN

CIN

—

570 || 4,5

—

Ω || pF

Output:

ZOUT = ROUT || COUT

—

570 || 3,7

—

Ω || pF

Temperature coefficient of frequency 1)

TCf

—

–0,03

—

ppm/K2

Frequency inversion point

10—30

°C

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