RF Components - SAW SF2181D 140 MHz SAW SAW Filter - IF - RFM offers a full set of custom embedded wireless networking solutions like Zigbee wireless mesh sensor networks, RF modules, IC transceiver, IC transmitters and IC receivers. RFM, Inc. manufactures low power wireless and RF radio modules, wireless mesh nodes for distributed sensing on distributed sensor networks. Low Power radio, n../arrowband and short range devices, front end saw filters, active RFID, RFIC, coupled resonator filters, single silicon chips in the 70MHZ and 300-1000Mhz range.

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SF2181D

140 MHz SAW Filter - IF

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� No External Matching Required
� 3.8 x 3.8 x 1.4 mm Surface-mount Package
� Complies with Directive 2002/95/EC (RoHS)
Click here if you need additional technical information,
to inquire about samples or to discuss your custom needs.

download data sheet Rev Date 02/16/10

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Specs
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Electrical Characteristics

Characteristic	Symbol	Minimum	Typical	Maximum	Units
Nominal Center Frequency	FC		140		MHz
Insertion Loss	ILMAX		8	9	dB
Insertion Loss Variation over Temperature				1	dB
3 dB Bandwidth		22	27		MHz
Passband Amplitude Ripple, Matching Network A, 129 to 151 MHz			0.8	1.2	dBP-P
Passband Amplitude Ripple, Matching Network B, 129 to 151 MHz			0.6	1.0	dBP-P
Passband Amplitude Ripple, Matching Network A or B, 130 to 150 MHz				1.0	dBP-P
Absolute Attenuation (referenced to ILMAX)
10 to 116 MHz		35	40		dB
165 to 700 MHz		35	40		dB
Absolute Group Delay in Passband			300	350	ns
Passband Group Delay Ripple, Matching Network A or B, 129 to 151 MHz			40	80	nsP-P
Input Impedance, Unbalanced Matching Network			50		ohm
Input Impedance, Balanced Matching Network			200		ohm
Input Return Loss through either Matching Network		6	14		dB
Output Impedance, Unbalanced Matching Network			50		ohm
Output Impedance, Balanced Matching Network			200		ohm
Output Return Loss through either Matching Network		6	14		dB
Operating Temperature Range		-40		+85	�C