SAW Components
Data Sheet B7845
SAW Components Low-Loss Filter for Mobile Communication Data Sheet
Features
s Low-loss RF filter for mobile telephone s s s s s s s
B7845 881,5 MHz
Chip sized SAW package QCS5E
0,68
2,0
GSM850 systems, receive path Very low insertion attenuation Low amplitude ripple Usable passband 25 MHz Unbalanced to balanced operation Impedance transformation from 50 Ω to 150 Ω Suitable for GPRS Class 1 to 12 Ceramic Package for Surface Mounted Technology (SMT)
0.735 0,075
2 3
0,38
0,075
0,44
5 4
bottom view
1
side view
Terminals
1,4
Marking and Package according to C61157-A7-A131 Packing
s Ni, gold-plated
top view
Dimensions in mm, approx. weight 0,007 g Pin configuration 1 3, 4 2, 5 Input, unbalanced Output, balanced Case ground
Type B7845
Ordering code B39881-B7845-K410
according to F61074-V8151-Z000
Electrostatic Sensitive Device (ESD) Maximum ratings Operable temperature range Storage temperature range DC voltage ESD voltage Input power at GSM850, GSM900 GSM1800 and GSM1900 Tx bands
T Tstg VDC VESD* PIN
– 40 / + 85 – 40 / + 85 5 100* 15
˚C ˚C V V dBm
machine model, 10 pulses peak power of GSM signal, duty cycle 4:8
* acc. to JESD22-A115A (Machine Model), 10 negative & 10 positive pulses 2 Sep 15, 2005
SAW Components Low-Loss Filter for Mobile Communication Data Sheet
Characteristics Operating temperature range: Terminating source impedance: Terminating load impedance:
B7845 881,5 MHz
T = 25 ˚C ZS = 50 Ω ZL = 150 Ω || 82 nH (balanced)
min. typ. 881,5 max. — MHz
Center frequency Maximum insertion attenuation 869,0 ... 894,0 Amplitude ripple (p-p) 869,0 ... 894,0 Input VSWR 869,0 ... 894,0 Output VSWR 869,0 ... 894,0 Attenuation 0,0 434,0 447,0 914,0 1000,0 1738,0 ... 434,0 ... 447,0 ... 849,0 ...1000,0 ...1738,0 ...6000,0 MHz MHz MHz MHz MHz MHz MHz MHz MHz
fC
αmax MHz ∆α
—
—
1,2
1,5
dB
—
0,4
0,6
dB
—
1,5
1,8
—
1,5
1,8
45 45 30 26 28 40
54 52 35 29 38 46
— — — — — —
dB dB dB dB dB dB
Amplitude balance (|S31/S21|) 869,0 ... 894,0 Phase balance (φ(S31)−φ(S21)+180˚) 869,0 ... 894,0 Common mode suppression 869,0 824,0 1648,0 3296,0
MHz
-1,0
-0,5 ... 0,0
1,0
dB
MHz Ssc12
-5
-3,0 ... 1,5
5
degree
... 894,0 ... 995,0 ... 1990,0 ... 3980,0
MHz MHz MHz MHz
20 20 22 20
26 26 40 35
— — — —
dB dB dB dB
3
Sep 15, 2005
SAW Components Low-Loss Filter for Mobile Communication Data Sheet
Characteristics Operating temperature range: Terminating source impedance: Terminating load impedance:
B7845 881,5 MHz
T = -20 to +75 ˚C ZS = 50 Ω ZL = 150 Ω || 82 nH (balanced)
min. typ. 881,5 max. — MHz
Center frequency Maximum insertion attenuation 869,0 ... 894,0 Amplitude ripple (p-p) 869,0 ... 894,0 Input VSWR 869,0 ... 894,0 Output VSWR 869,0 ... 894,0 Attenuation 0,0 434,0 447,0 914,0 1000,0 1738,0 ... 434,0 ... 447,0 ... 849,0 ...1000,0 ...1738,0 ...6000,0 MHz MHz MHz MHz MHz MHz MHz MHz MHz
fC
αmax MHz ∆α
—
—
1,3
1,6
dB
—
0,6
0,8
dB
—
1,6
1,8
—
1,6
1,8
45 45 30 26 28 40
54 52 35 29 38 46
— — — — — —
dB dB dB dB dB dB
Amplitude balance (|S31/S21|) 869,0 ... 894,0 Phase balance (φ(S31)−φ(S21)+180˚) 869,0 ... 894,0 Common mode suppression 869,0 824,0 1648,0 3296,0
MHz
-1,0
-0,6 ... 0,0
1,0
dB
MHz Ssc12
-5
-3,0 ... 1,5
5
degree
... 894,0 ... 995,0 ... 1990,0 ... 3980,0
MHz MHz MHz MHz
20 20 22 20
26 26 40 35
— — — —
dB dB dB dB
4
Sep 15, 2005
SAW Components Low-Loss Filter for Mobile Communication Data Sheet
Transfer function (narrow band)
B7845 881,5 MHz
Transfer function (wideband)
5
Sep 15, 2005
SAW Components Low-Loss Filter for Mobile Communication Data Sheet
B7845 881,5 MHz
Published by EPCOS AG Surface Acoustic Wave Components Division, SAW MC WT P.O. Box 80 17 09, D-81617 München © EPCOS AG 2005. Reproduction, publication and dissemination of this brochure and the information 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 the Electrical and Electronics Industry recommended by the ZVEI (German Electrical and Electronic Manufacturers’ Association), unless otherwise agreed. This brochure replaces the previous edition. For questions on technology, prices and delivery please contact the Sales Offices of EPCOS AG or the international Representatives. Due to technical requirements components may contain dangerous substances. For information on the type in question please also contact one of our Sales Offices.
6
Sep 15, 2005
