SAW FILTER
HDF4177
1 Features
·SAW Filter
·ROHS Compliant
·Leadless Surface Mount
·Application in CDMA Base Station
2
Techniacl Characteristics
Parameter
Min(1) Typ(1) Max(1) Units
Cpk
Center Frequency ( f0 )
177
20
8
MHz
MHz
dB
1dB Pass Bandwidth(6)
20
Insertion Loss (Passband)(2)
Insertion Loss (Passband) Variation Over
Operating Temperature Range
9
1
dB
Passband Ripple (Passband) (4)
1.0
40
1.2
dB p-p
10 MHz to 149 MHz
Rejection(3)
dBc
us
209 MHz to 350 MHz
40
0.40
70
50(2)
50(2)
8.0
8.0
25
Absolute Delay at Passband
Group Delay Variation (Passband)
Input Impedance
80
ns p-p
ohm
ohm
dB
Output Impedance
Input VSWR(2)
6.0
6.0
-40
Ouput VSWR(2)
dB
oC
Operating Temperature Range
85
Notes:
(1) Typical values are norminal performances at room temperature, minimum and maximum values
take into account the variations over the temperature range and the variations of standard
matching elements (±5% for inductors and capacitors).
(2) With external matching networks.
(3) The amplitude of rejection is as the maximum insertion loss for reference.
(4) The Passband Ripple is defined as the maximum level minus minimum level over the Passband.
(5) All the electrical specifications must be satisfied over operating temperature range.
(6) If the rejections can be ensured, the passband should be as wider as possible.
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