SAW FILTER

HDF4177

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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

177

MHz

1dB Pass Bandwidth

(6)

20

20

MHz

Insertion Loss (Passband)

(2)

8

9

dB

Insertion Loss (Passband) Variation Over

Operating Temperature Range

1

dB

Passband Ripple (Passband)

(4)

1.0

1.2

dB p-p

10 MHz to 149 MHz

40

Rejection

(3)

209 MHz to 350 MHz

40

dBc

Absolute Delay at Passband

0.40

us

Group Delay Variation (Passband)

70

80

ns p-p

Input Impedance

50

(2)

ohm

Output Impedance

50

(2)

ohm

Input VSWR

(2)

6.0

8.0

dB

Ouput VSWR

(2)

6.0

8.0

dB

Operating Temperature Range

-40

25

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.