B3575 datasheet(3/6 Pages) EPCOS

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May 11, 2005

SAW Components

B3575

433,92 MHz

Low Loss Filter

Data Sheet

Characteristics

Reference temperature:

TA = –45 ... 95 ˚C

Terminating source impedance:

ZS = 50 Ω and matching network

Terminating load impedance:

ZL = 50 Ω and matching network

1)Temperature dependance 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

—

433,92

—

MHz

(center frequency between 3 dB points)

Minimum insertion attenuation

min

433,83 ... 434,01 MHz

—

3,4

4,7

(including loss in matching coils)

Amplitude ripple (p-p)

433,83 ... 434,01 MHz

—

0,5

2,0

433,81 ... 434,03 MHz

—

0,7

3,0

Relative attenuation (relative to

min)

rel

10,00 ... 300,00 MHz

—

300,00 ... 400,00 MHz

—

400,00 ... 424,00 MHz

—

424,00 ... 430,00 MHz

—

430,00 ... 433,02 MHz

—

434,92 ... 439,00 MHz

—

439,00 ...1000,00 MHz

—

Impedance for pass band matching 2)

Input:

ZIN

RIN

CIN

—

360 || 2,0

—

Ω || pF

Output:

ZOUT = ROUT || COUT

—

360 || 2,1

—

Ω || pF

Temperature coefficient of frequency 1)

TCf

—

–0,03

—

ppm/K2

Frequency inversion point

10—40

°C

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