SAW Components
Data Sheet B3850
2Jul 15, 2002
SAW Components B3850
125,00 MHzLow-Loss Filter
Data Sheet
top view
side view
bottom view
1,6
6,5
13,3
1,7
1,0 7,62
1234
5
6
78
910
3,81
2,3
Ceramic package DCC12A
Features
■Low-loss IF filter for GSM EDGE base station
■Usable bandwidth 400 kHz
■Very low group delay ripple
■Temperature stable
■Ceramic SMD package
Terminals
■Gold plated
Dimensions in mm, approx. weight 0,4 g
Pin configuration
10 Input
1 Input ground
5 Output
6 Output ground
3, 8 Ground
2, 4, 7, 9 Case ground
Electrostatic Sensitive Device (ESD)
Type Ordering code Marking and Package
according to Packing
according to
B3850 B39121-B3850-H510 C61157-A7-A94 F61074-V8131-Z000
Maximum ratings
Operable temperature range
T
–40 / +85 ˚C
Storage temperature range
T
stg –40 / +85 ˚C
DC voltage
V
DC 1,2 V
Source power
P
s10 dBm
3Jul 15, 2002
SAW Components B3850
125,00 MHzLow-Loss Filter
Data Sheet
Characteristics
Operating temperature range: T = -10 .. 85 ˚C
Terminating source impedance:
Z
S= 50 Ω and matching network
Terminating load impedance:
Z
L= 50 Ω and matching network
min. typ. max.
Nominal frequency
f
N— 125,0 — MHz
Minimum insertion attenuation αmin — 6,2 7,0 dB
Pass bandwidth αrel ≤1,0 dB
B
1dB 400 560 — kHz
αrel ≤ 3,0 dB
B
3dB — 840 — kHz
Amplitude ripple (peak to adjacent valley)
f
N± 200 kHz — 0,1 — dB
Amplitude variation (p-p) ∆α
f
N± 200 kHz — 0,6 1,0 dB
Absolute group delay τ
@
f
N0,7 1,1 1,7 µs
Group delay ripple (p-p) ∆τ
f
N± 200 kHz — 70 120 ns
Relative attenuation (relative to αmin)αrel
f
N± 0,4 MHz ...
f
N± 0,6 MHz 0 2 — dB
f
N± 0,6 MHz ...
f
N± 1,2 MHz 8 10 — dB
f
N± 1,2 MHz ...
f
N± 1,8 MHz 20 30 — dB
f
N± 1,8 MHz ...
f
N± 3,4 MHz 25 40 — dB
f
N± 3,4 MHz ...
f
N± 6,5 MHz 34 50 — dB
f
N± 6,5 MHz ...
f
N± 9,5 MHz 40 50 — dB
f
N± 9,5 MHz ...
f
N± 17,0 MHz 43 60 — dB
10,0 MHz ...
f
N− 17,0 MHz 55 60 — dB
f
N+ 17,0 MHz ... 450,0 MHz1) 55 60 — dB
VSWR (Input and output in pass band) — 2,0 2,3
4Jul 15, 2002
SAW Components B3850
125,00 MHzLow-Loss Filter
Data Sheet
1) Narrowband responses (typ. 40 dB) at 202 MHz, 228 MHz, 250 MHz, and at 375 MHz
2) Temperature dependance of
f
c:
f
c(
T
A) =
f
c(
T
0)(1 +
TC
f(
T
A –
T
0)2)
Matching network to 50 Ω
(Element values depend upon PCB layout)
Lp1 = 33 nH Ls3 = 56 nH
Ls2 = 68 nH Lp4 = 27 nH
Temperature coefficient of frequency 2)
TC
f— – 0,036 — ppm/K2
Turnover temperature
T
0—50—˚C
min. typ. max.
5Jul 15, 2002
SAW Components B3850
125,00 MHzLow-Loss Filter
Data Sheet
Normalized frequency response
Normalized frequency response (pass band)
6Jul 15, 2002
SAW Components B3850
125,00 MHzLow-Loss Filter
Data Sheet
Published by EPCOS AG
Surface Acoustic Wave Components Division, SAW MC IS
P.O. Box 80 17 09, 81617 Munich, GERMANY
EPCOS AG 2002. Reproduction, publication and dissemination of this brochure and the informa-
t
ion contained therein without EPCOS’ prior express consent is prohibited.
Purchase orders are subject to the General Conditions for the Supply of Products and Services of
t
he Electrical and Electronics Industry recommended by the ZVEI (German Electrical and Electronic
Manufacturers’ Association), unless otherwise agreed.
T
his brochure replaces the previous edition.
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.