SAW Components
Data Sheet B3640
2Apr 04, 2001
SAW Components B3640
238,0 MHzLow-Loss Filter
Data Sheet
Ceramic package QCC12
Features
●Low-loss IF filter for DCS base station
●Tx path
●Temperature stable
●Ceramic SMD package
Terminals
●Gold plated
Dim. in mm, aprox. weight 0,4 g
Pin configuration
1, 10 Input (balanced)
7 Output
4 Output ground
3, 9 To be grounded
2, 6, 8, 12 Case ground
5, 11 Not connected
Electrostatic Sensitive Device (ESD)
Type Ordering code Marking and Package
according to Packing
according to
B3640 B39231-B3640-Z510 C61157-A7-A55 F61074-V8026-Z000
Maximum ratings
Operable temperature range
T
– 20/+ 75 ˚C
Storage temperature range
T
stg – 40/+ 85 ˚C
DC voltage
V
DC 10 V
Source power
P
s10 dBm
3Apr 04, 2001
SAW Components B3640
238,0 MHzLow-Loss Filter
Data Sheet
Characteristics
Operating temperature range:
T
A= -5 - 75 ˚C
Terminating source impedance:
Z
S= 200 Ω and matching network.
Terminating load impedance:
Z
L= 50 Ω and matching network
1) Temperature dependance of
f
c:
f
c(
T
A) =
f
c(
T
0)(1 +
TC
f(
T
A –
T
0)2)
min. typ. max.
Nominal frequency
f
N— 238,0 — MHz
Minimum insertion attenuation αmin 7 8,5 9,5 dB
(including matching network)
Amplitude ripple (p-p) ∆α
fN± 100 kHz — 0,3 1,1 dB
fN± 300 kHz — 1,9 3,0 dB
Absolute group delay τ— 1,5 3 µs
Group delay variation ∆τ
fN± 100 kHz — 50 150 ns
fN± 300 kHz — 90 250 ns
Relative attenuation (relative to αmin)αrel
fN± 0,6 MHz ... fN± 0,8 MHz 5 8 — dB
fN± 0,8 MHz ... fN± 1,8 MHz 10 25 — dB
fN± 1,8 MHz ... fN± 6,0 MHz 25 45 — dB
fN± 6,0 MHz ... fN± 20 MHz 30 41 — dB
fN± 20 MHz ... fN± 120 MHz 40 42 — dB
Temperature coefficient of frequency 1)
TC
f—–0,036 — ppm/K2
Turnover temperature
T
0—30—˚C
4Apr 04, 2001
SAW Components B3640
238,0 MHzLow-Loss Filter
Data Sheet
Matching network (element values depend on pcb layout)
Cp1 = 10 pF
Ls2 = 22 nH
Ls3 = 27 nH
Ls4 = 33 nH
Cp5 = 22 pF
5Apr 04, 2001
SAW Components B3640
238,0 MHzLow-Loss Filter
Data Sheet
Normalized frequency response
Normalized frequency response (pass band)
6Apr 04, 2001
SAW Components B3640
238,0 MHzLow-Loss Filter
Data Sheet
Published by EPCOS AG
Surface Acoustic Wave Components Division, SAW MC IS
P.O. Box 80 17 09, D-81617 München
EPCOS AG 1999. All Rights Reserved.
A
s far as patents or other rights of third parties are concerned, liability is only assumed for compo-
nents per se, not for applications, processes and circuits implemented within components or
assemblies.
T
he information describes the type of component and shall not be considered as assured
characteristics.
T
erms of delivery and rights to change design reserved.
For questions on technology, prices and delivery please contact the sales offices of EPCOS AG or
t
he international representatives.
Due to technical requirements components may contain dangerous substances. For information on
t
he type in question please also contact one of our sales offices.
