Preliminary Data Sheet
Part Number 856190
942.5 MHz SAW Filter
Features
• For EGSM applications
• Usable bandwidth 35 MHz
• Low loss
• High attenuation
• Superior amplitude and phase balance
• Single-ended input
• Balanced output
• Chip Scale Package (CSP)
• Ceramic surface mount package
• Hermetic
•
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 Output
3,4 Case ground
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
Subject to change or obsolescence without notice Rev - 05-Mar-2003 Page 1 of 5
Preliminary Data Sheet
Part Number 856190
942.5 MHz SAW Filter
Electrical Specifications (1)
Operating Temperature Range: (2) -20 to +80 oC
Parameter (3) Minimum Typical Maximum Unit
Center Frequency - 942.5 - MHz
Maximum Insertion Loss
925 - 960 MHz
-
2.8
3.7
dB
Amplitude Variation
925 - 960 MHz
-
0.7
1.7
dB p-p
Absolute Attenuation
0 - 880 MHz
880 - 905 MHz
905 - 915 MHz
980 - 1050 MHz
1050 - 6000 MHz
50
30
18
22
50
60
38
22
32
60
-
-
-
-
-
dB
dB
dB
dB
dB
Input VSWR
925 - 960 MHz
-
2.0
2.4
-
Output VSWR
925 - 960 MHz
-
2.0
2.4
-
Output Phase Balance φ(S31)- φ(S21)
925 - 960 MHz
170
175
180
degree
Output Amplitude Balance (|S31/S21|)
925 - 960 MHz
-0.75
0
0.75
dB
Source Impedance - 50 -
Ω
Optimal Load Impedance (4) - 210 || 60nH - Ω
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 given a 50 ohm source impedance
Test Circuit:
Actual matching values may vary due to PCB layout and parasitics
50 Ω
Single-ended
Input
2,5
13
50Ω4
200Ω
45nH
200 Ω
Balanced Output
Subject to change or obsolescence without notice Rev - 05-Mar-2003 Page 2 of 5
Preliminary Data Sheet
Part Number 856190
942.5 MHz SAW Filter
Typical Performance (at +25oC)
Subject to change or obsolescence without notice Rev - 05-Mar-2003 Page 3 of 5
Preliminary Data Sheet
Part Number 856190
942.5 MHz SAW Filter
Matching Schematics
Actual matching values may vary due to PCB layout and parasitics
50 Ω
Single-ended
Input
2,5
13
50Ω4
200Ω
45nH
200 Ω
Balanced Output
Marking PCB Footprint
Marking
code
MFG site
LM
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 - 05-Mar-2003 Page 4 of 5
Preliminary Data Sheet
Part Number 856190
942.5 MHz SAW Filter
Maximum Ratings
Parameter Symbol Minimum Maximum Unit
Operating Temperature Range T -30 +85 oC
Storage Temperature Range Tstg -40 +85
oC
Warnings
• Electrostatic Sensitive Device (ESD)
• Avoid ultrasonic exposure
Links to Additional Technical Information
PCB Layout Tips Qualification Flowchart
S-Parameters
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
Soldering Profile
Other Technical Information
Subject to change or obsolescence without notice Rev - 05-Mar-2003 Page 5 of 5
