Data Sheet
Part Number 856228
1575.42 MHz SAW Filter
Features
For GPS applications
Usable bandwidth 2 MHz
Super low loss
High attenuation
No impedance matching required for operation
at 100
Single-ended input
Balanced output
Superior amplitude and phase balance
Ceramic Chip Scale Package (CSP)
Hermetic
RoHS compliant (2002/95/EC), Pb-free
Package Pin Configuration
Surface Mount 2.00 x 1.50 x 0.76 mm Bottom View
5
2
4
3
1
Pin No. Description
1 Input
2,5 Case ground
3,4 Balanced output
1.30
1.80
2.00
0.76 NOM.
0.84 MAX.
0.30
1.50
0.75
0.30
Dimensions shown are nominal in millimeters
All tolerances are ±0.10mm
Body: Al2O3 ceramic
Lid: Kovar or Alloy 42, Au over Ni plated
Terminations: Au plating 0.5 - 1.0µm,
over a 2 - 6µm Ni plating
Pb
Subject to change or obsolescence without notice Rev E 30-Sep-2005 Page 1 of 6
Data Sheet
Part Number 856228
1575.42 MHz SAW Filter
Electrical Specifications (1)
Operating Temperature: (2) +25
oC
Parameter (3) Minimum Typical Maximum Unit
Center Frequency - 1575.42 - MHz
Maximum Insertion Loss
1574.42 - 1576.42 MHz
-
1.4
1.7
dB
Absolute Attenuation
DC - 1450 MHz
1450 - 1475 MHz
1475 - 1525 MHz
1625 - 1675 MHz
1675 - 1775 MHz
1775 - 3155 MHz
3155 - 6000 MHz
30
27
15
12
20
30
35
38
31
26
14
22
35
45
-
-
-
-
-
-
-
dB
dB
dB
dB
dB
dB
dB
Input/Output Return Loss
1574.42 - 1576.42 MHz
10
16
-
dB
Output Amplitude Balance (|S31/S21|)
1574.42 - 1576.42 MHz
-
0.5
0.75
dB
Output Phase Balance φ(S31)- φ(S21)
1574.42 - 1576.42 MHz
180
185
190
degree
Nominal Source Impedance - 50 -
Optimal Load Impedance (balanced) (4) - 120 + j35 -
Notes:
1. All specifications are based on the test circuit shown below
2. This specification is valid for room temperature only. The specification over the full temperature range(s) is available on the next
page(s)
3. Electrical margin has been built into the design to account for the variations due to manufacturing tolerances
4. This is the optimum impedance for maximum power transfer over passband
Test Circuit:
50
Single-ended
Input
2,5
13
50
4
100
100
Balanced
Output
Subject to change or obsolescence without notice Rev E 30-Sep-2005 Page 2 of 6
Data Sheet
Part Number 856228
1575.42 MHz SAW Filter
Electrical Specifications (1)
Operating Temperature Range: (2) -40 to +85 oC
Parameter (3) Minimum Typical Maximum Unit
Center Frequency - 1575.42 - MHz
Maximum Insertion Loss
1574.42 - 1576.42 MHz
-
1.4
1.7
dB
Absolute Attenuation
DC - 1450 MHz
1450 - 1475 MHz
1475 - 1525 MHz
1625 - 1675 MHz
1675 - 1775 MHz
1775 - 3155 MHz
3155 - 6000 MHz
30
27
14
10
20
30
35
38
31
20
13
22
35
45
-
-
-
-
-
-
-
dB
dB
dB
dB
dB
dB
dB
Input/Output Return Loss
1574.42 - 1576.42 MHz
10
16
-
dB
Output Amplitude Balance (|S31/S21|)
1574.42 - 1576.42 MHz
-
0.6
1
dB
Output Phase Balance φ(S31)- φ(S21)
1574.42 - 1576.42 MHz
180
187.5
195
degree
Nominal Source Impedance - 50 -
Optimal Load Impedance (balanced) (4) - 120 + j35 -
Notes:
1. All specifications are based on the test circuit shown below
2. In production, devices will be tested at room temperature to a guardbanded specification to ensure electrical compliance over
temperature
3. Electrical margin has been built into the design to account for the variations due to temperature drift and manufacturing tolerances
4. This is the optimum impedance for maximum power transfer over passband
Test Circuit:
50
Single-ended
Input
2,5
13
50
4
100
100
Balanced
Output
Subject to change or obsolescence without notice Rev E 30-Sep-2005 Page 3 of 6
Data Sheet
Part Number 856228
1575.42 MHz SAW Filter
Typical Performance (at +25oC)
Subject to change or obsolescence without notice Rev E 30-Sep-2005 Page 4 of 6
Data Sheet
Part Number 856228
1575.42 MHz SAW Filter
Matching Schematics
50
Single-ended
Input
2,5
13
50
4
100
100
Balanced
Output
Marking PCB Footprint
Marking
code
MFG site
KM
WWY
ID dot
Date code
1.50
2.00
0.50
0.75
0.50
The date code consists of: WW = 2 digit week,
Y = last digit of year, M = manufacturing site code
This footprint represents a recommendation only
Dimensions shown are nominal in millimeters
Tape and Reel
1.83
Section A-A
0.3
1.09
2.34
Ø1.5
Ø1.0
4.0
4.0
2.0 A
A
8.0
3.5
1.75
8.8
ID dot
2.0
Direction of travel
Ø330
Ø20.2
Ø13.0
Ø102
2.7
Dimensions shown are nominal in millimeters
Packaging quantity: 10000 units/reel
Subject to change or obsolescence without notice Rev E 30-Sep-2005 Page 5 of 6
Data Sheet
Part Number 856228
1575.42 MHz SAW Filter
Maximum Ratings
Parameter Symbol Minimum Maximum Unit
Operating Temperature Range T -40 +85 oC
Storage Temperature Range Tstg -40 +85
oC
Important Notes
Warnings
Electrostatic Sensitive Device (ESD)
Avoid ultrasonic exposure
RoHS Compliance
This product complies with EU directive 2002/95/EC (RoHS)
Solderability
Compatible with JEDEC J-STD-020C Pb-free process, 260°C peak reflow temperature (see soldering profile)
Links to Additional Technical Information
PCB Layout Tips Qualification Flowchart Soldering Profile
S-Parameters RoHS information Other Technical Information
Sawtek’s liability is limited only to the Surface Acoustic Wave (SAW) component(s) described in this data sheet. Sawtek does not accept any liability for
applications, processes, circuits or assemblies, which are implemented using any Sawtek component described in this data sheet.
Contact Information
PO Box 609501
Orlando, FL 32860-9501
USA
Phone: +1 (407) 886-8860
Fax: +1 (407) 886-7061
Email: custservice@sawtek.com
Web: www.sawtek.com
Or contact one of our worldwide
Network of sales offices,
representatives or distributors
Pb
Subject to change or obsolescence without notice Rev E 30-Sep-2005 Page 6 of 6