B3608 datasheet(4/8 Pages) EPCOS

4 / 8 page

Jul 12, 2002

SAW Components

B3608

140 MHz

Low-Loss Filter

Preliminary Data Sheet

Characteristics

Operating temperature:

= -40 ˚C ... +85 ˚C

Terminating source impedance:

ZS =50 Ω and matching circuit

Terminating load impedance:

ZL =50 Ω and matching circuit

Group delay aperture:

200 kHz

min.

typ.

max.

Center frequency

138,85

140,00

141,15 MHz

(Center between 3dB points)

Insertion attenuation at fC

—

Amplitude ripple (max peak to adjacent valley)

∆α

(80% of

B3dB)

133,60 ... 146,40 MHz

—

0,5

0,9

Phase ripple (p-p)

∆ϕ

(80% of

B3dB)

133,60 ... 146,40 MHz

—

Pass bandwidth

rel ≤

1dB

B1dB

15,0

16,0

—

MHz

rel ≤

3dB

B3dB

16,0

16,8

—

MHz

rel ≤ 40

B40dB

—

21,0

22,0

MHz

Relative attenuation relative to

rel

100,00 ... 128,70 MHz

—

128,70 ... 129,00 MHz

—

151,00 ... 152,30 MHz

—

152,30 ... 180,00 MHz

—

Group delay ripple (p-p)

∆τ

(80% of

B3dB)

133,60 ... 146,40 MHz

—

140

Reflected wave signal suppression

0,70

µs … 3,75 µs after main pulse

—

Temperature coefficient of frequency

TCf

—

– 87

—

ppm/K

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