Datasheet > SF2178A

SF2178A

更新时间： 2024-01-29 06:01:12

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描述
168 MHz SAW Filter

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数据手册

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SF2178A 数据手册

SF2178A

• Precision IF SAW Filter

• Hermetic 13.3 x 6.5 mm Surface-mount Case

• Complies with Directive 2002/95/EC (RoHS)

168 MHz

SAW Filter

Absolute Maximum Ratings

Rating

Value

+10

Units

dBm

VDC

°C

Maximum Incident Power in Passband

Maximum DC Voltage Between any 2 Terminals

Storage Temperature Range

-40 to +85

Suitable for Lead-free Soldering - Maximum Soldering Profile

260°C for 30 s

SM13365-12

Electrical Characteristics

Characteristic

Sym

Notes

Min

Typ

168

Max

Units

Center Frequency

MHz

20.9

22.4

181.7

155.1

12.2

0.76

0.85

1 dB Bandwidth

20.0

3 dB Bandwidth

Upper -35 dB Band Edge

Lower -35 dB Band Edge

182.0

154

-40

Insertion Loss

13.5

1.0

Passband Ripple (p-p)

158 to 178 MHz

Absolute Group Delay

168 MHz

1, 2, 3

µs

Group delay ripple (p-p)

Operating Temperature

158 to 178 MHz

160

+85

°C

Source Impedance

2.3

ohm

VSWR to Source (Matching Network)

Load Impedance

159.5 to 168.5 MHz

ohm

VSWR to Load (Matching Network)

Frequency Temperature Coefficient

2.2

-72

ppm/°C

Impedance Matching to 50 Ω Unbalanced

Case Style

External L-C

SM13365-12 13.3 x 6.5 mm Nominal Footprint

RFM SF2178A YYWW

Lid Symbolization (YY = year, WW = week)

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

Notes:

Unless noted otherwise, all specifications apply over the operating temperature range with filter soldered to the specified demonstration board with impedance

matching to 50 Ω and measured with 50 Ω network analyzer.

Unless noted otherwise, all frequency specifications are referenced to the nominal center frequency, fc.

Rejection is measured as attenuation below the minimum IL point in the passband. Rejection in final user application is dependent on PCB layout and external

impedance matching design. See Application Note No. 42 for details.

Part to part absolute delay measurement records the absolute delay mean across 1 dB passband.

"LRIP" or "L" after the part number indicates "low rate initial production" and "ENG" or "E" indicates "engineering prototypes.”

The design, manufacturing process, and specifications of this filter are subject to change.

Either Port 1 or Port 2 may be used for either input or output in the design. However, impedances and impedance matching may vary between Port 1 and Port

2, so that the filter must always be installed in one direction per the circuit design.

US and international patents may apply.

www.RFM.com E-mail: info@rfm.com

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