Data Sheet
Features
•
•
•
•
•
•
•
•
•
For DCS applications
Usable bandwidth 75 MHz
Low loss
High attenuation
Single-ended input
Balanced output
Superior amplitude and phase balance
Ceramic Surface Mount Package (SMP)
Small size
Part Number 856079
1842.5 MHz SAW Filter
•
Package
Surface Mount 2.50 x 2.00 x 0.76 mm
Pin Configuration
Bottom View
2
3
1
0.76 NOM.
0.84 MAX.
2.50
0.94
5
4
2.00
0.50
1.38
Pin No.
1
2,5
3,4
Description
Input
Case ground
Balanced output
0.50
0.94
Dimensions shown are nominal in millimeters
All tolerances are
±0.10mm
Body:
Al
2
O
3
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 D
05-Sep-2002
Page 1 of 7
Data Sheet
Operating Temperature:
(2)
+25
o
C
Part Number 856079
1842.5 MHz SAW Filter
Electrical Specifications
(1)
Parameter
(3)
Center Frequency
Maximum Insertion Loss
1805 - 1880 MHz
Absolute Attenuation
DC - 1000 MHz
1000 - 1710 MHz
1710 - 1765 MHz
1765 - 1785 MHz
1920 - 1980 MHz
1980 - 2090 MHz
2090 - 3000 MHz
3000 - 6000 MHz
(4)
Passband Ripple
1805 - 1880 MHz
Input/Output Return Loss
1805 - 1880 MHz
Output Amplitude Balance (|S
31
/S
21
|)
1805 - 1880 MHz
Output Phase Balance
φ(S
31
)-
φ(S
21
)
1805 - 1880 MHz
Source Impedance
(5)
Optimal Load Impedance (balanced)
Notes:
1.
2.
3.
4.
5.
Minimum
-
-
40
30
20
12
15
20
30
40
-
8
-
165
-
-
Typical
1842.5
2.5
45
34
25
17
17
27
40
50
0.7
10
1.4
180
50
200 || 18nH
Maximum
-
2.9
-
-
-
-
-
-
-
-
1.0
-
2
190
-
-
Unit
MHz
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
degree
Ω
Ω
All specifications are based on the test circuit shown below
This specification is valid for room temperature only. The specification over the full temperature range(s) is available on the next
page(s)
Electrical margin has been built into the design to account for the variations due to manufacturing tolerances
This is the maximum peak to adjacent valley amplitude change in passband
This is the optimum impedance for maximum power transfer
Test Circuit:
Actual matching values may vary due to PCB layout and parasitics
1
3
18nH
50Ω
2,5
4
200Ω
50
Ω
Single-ended
Input
200
Ω
Balanced
Output
Subject to change or obsolescence without notice
Rev D
05-Sep-2002
Page 2 of 7
Data Sheet
Operating Temperature Range:
(2)
-30 to +80
o
C
Part Number 856079
1842.5 MHz SAW Filter
Electrical Specifications
(1)
Parameter
(3)
Center Frequency
Maximum Insertion Loss
1805 - 1880 MHz
1805 - 1880 MHz (+15 to +35
o
C)
Absolute Attenuation
DC - 1000 MHz
1000 - 1710 MHz
1710 - 1765 MHz
1765 - 1785 MHz
1920 - 1980 MHz
1980 - 2090 MHz
2090 - 3000 MHz
3000 - 6000 MHz
(4)
Passband Ripple
1805 - 1880 MHz
Input/Output Return Loss
1805 - 1880 MHz
Output Amplitude Balance (|S
31
/S
21
|)
1805 - 1880 MHz
Output Phase Balance
φ(S
31
)-
φ(S
21
)
1805 - 1880 MHz
Source Impedance
(5)
Optimal Load Impedance (balanced)
Notes:
1.
2.
3.
4.
5.
Minimum
-
-
-
40
30
20
8
15
20
30
40
-
8
-
165
-
-
Typical
1842.5
2.8
2.5
45
34
25
10
17
27
40
50
0.7
10
1.4
180
50
200 || 18nH
Maximum
-
3.5
-
-
-
-
-
-
-
-
-
1.0
-
2
190
-
-
Unit
MHz
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
degree
Ω
Ω
All specifications are based on the test circuit shown below
In production, devices will be tested at room temperature to a guardbanded specification to ensure electrical compliance over
temperature
Electrical margin has been built into the design to account for the variations due to temperature drift and manufacturing tolerances
This is the maximum peak to adjacent valley amplitude change in passband
This is the optimum impedance for maximum power transfer
Test Circuit:
Actual matching values may vary due to PCB layout and parasitics
1
3
18nH
50Ω
2,5
4
200Ω
50
Ω
Single-ended
Input
200
Ω
Balanced
Output
Subject to change or obsolescence without notice
Rev D
05-Sep-2002
Page 3 of 7
Data Sheet
Operating Temperature Range:
(2)
-30 to +80
o
C
Part Number 856079
1842.5 MHz SAW Filter
Electrical Specifications
(1)
Parameter
(3)
Center Frequency
Maximum Insertion Loss
1805 - 1880 MHz
1805 - 1880 MHz (+15 to +35
o
C)
Absolute Attenuation
DC - 1000 MHz
1000 - 1710 MHz
1710 - 1765 MHz
1765 - 1785 MHz
1920 - 1980 MHz
1980 - 2090 MHz
2090 - 3000 MHz
3000 - 6000 MHz
(4)
Passband Ripple
1805 - 1880 MHz
Input/Output Return Loss
1805 - 1880 MHz
Output Amplitude Balance (|S
31
/S
21
|)
1805 - 1880 MHz
Output Phase Balance
φ(S
31
)-
φ(S
21
)
1805 - 1880 MHz
Source Impedance
(4)
Optimal Load Impedance (balanced)
Notes:
1.
2.
3.
4.
5.
Minimum
-
-
-
40
30
20
8
15
20
30
40
-
8
-
165
-
-
Typical
1842.5
3.05
2.75
45
34
25
10
17
27
40
50
0.7
10
1.4
180
50
200 || 18nH
Maximum
-
3.75
-
-
-
-
-
-
-
-
-
1.0
-
2
190
-
-
Unit
MHz
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
degree
Ω
Ω
All specifications are based on the test circuit shown below
In production, devices will be tested at room temperature to a guardbanded specification to ensure electrical compliance over
temperature
Electrical margin has been built into the design to account for the variations due to temperature drift and manufacturing tolerances
This is the maximum peak to adjacent valley amplitude change in passband
This is the optimum impedance for maximum power transfer
Test Circuit:
Actual matching values may vary due to PCB layout and parasitics
1.5pF
1
3
6.8nH
50Ω
2,5
4
1.5pF
100Ω
50
Ω
Single-ended
Input
100
Ω
Balanced
Output
Subject to change or obsolescence without notice
Rev D
05-Sep-2002
Page 4 of 7
Data Sheet
Part Number 856079
1842.5 MHz SAW Filter
Typical Performance
(at +25
o
C)
Subject to change or obsolescence without notice
Rev D
05-Sep-2002
Page 5 of 7
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