Part Number 855736
70 MHz SAW Filter
Preliminary Data Sheet
Features
For IF applications
Typical 3 dB bandwidth of 0.7 MHz
High attenuation
Single-ended operation
Ceramic Surface Mount Package (SMP)
Replaces Sawtek P/N 851542 (BW 3dB = 0.5 MHz)
Hermetic
RoHS compliant (2002/95/EC), Pb-free
Pb
Package Pin Configuration
Surface Mount 24.60 x 9.00 x 2.31 mm Bottom View
1 2 3 4 5
2.31 NOM.
2.62 MAX.
10 9 8 7 6
1.02
24.6
1.91
1.80
Pin No. Description
R0.5
9.00
1 Input return
2.31
5 Output
1.02
3.53 x 4.83
6 Output return
10 Input
2,3,4,7,8,9 Case ground
Dimensions shown are nominal in millimeters
All tolerances are 0.15mm except overall
length and width 0.20mm
Body: Al O ceramic
2 3
Lid: Kovar, Ni plated
Terminations: Au plating 0.5 - 1.0m,
over a 2 - 6m Ni plating
Subject to change or obsolescence without notice Rev B 27-Oct-2005 Page 1 of 5 Part Number 855736
70 MHz SAW Filter
Preliminary Data Sheet
(1)
Electrical Specifications
(2) o
Operating Temperature Range: 0 to +70 C
(3)
Parameter Minimum Typical Maximum Unit
Center Frequency - 70 - MHz
Minimum Insertion Loss - 21.3 22 dB
(4)
Upper 1 dB Point 70.155 70.205 - MHz
(4)
Lower 1 dB Point - 69.795 69.845 MHz
(4)
Upper 3 dB Point 70.31 70.35 - MHz
(4)
Lower 3 dB Point - 69.65 69.69 MHz
(4)
Upper 40 dB Point - 70.815 70.836 MHz
(4)
Lower 40 dB Point 69.165 69.185 - MHz
Absolute Attenuation
10 - 68 MHz 60 62 - dB
72 - 85 MHz 45 55 - dB
85 - 108 MHz 60 62 - dB
108 - 140 MHz 50 55 - dB
140 - 200 MHz 60 62 - dB
Amplitude Variation
- 0.8 1 dB p-p
69.85 - 70.15 MHz
Phase Ripple
69.85 - 70.15 MHz - 1.2 3 deg p-p
Group Delay Variation
69.85 - 70.15 MHz - 100 200 nsec p-p
(6)
Source Impedance: - 50 -
(6)
Load Impedance: - 50 -
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. All attenuation measurements are measured relative to minimum insertion loss
5. This is the optimum impedance in order to achieve the performance shown
Test Circuit:
5pF 1000nH 1000nH 6pF
5
10
50 33pF 50
50
1,2,3,4
Single-ended
6,7,8,9
Subject to change or obsolescence without notice Rev B 27-Oct-2005 Page 2 of 5