RF1211D

Features:

• Ideal Front-End Filter for Domestic Wireless Receivers
• Low-Loss, Coupled-Resonator Quartz Design
• Simple External Impedance Matching
• Complies with Directive 2002/95/EC (RoHS)




Specifications

Characteristic Symbol Minimum Typical Maximum Units Center Frequency at 25C Absolute Frequency fc 314.85 315.00 315.15 MHz Insertion Loss ILMIN 1.6 2.5 dB Passband Ripple (Relative to ILMIN) Fc 150kHz 0.7 1.2 dB 3 dB Bandwidth BW3 500 600 800 kHz Rejection Attenuation: (relative to ILmin) 10 - 295 MHz 46 51 dB 295 - 305 MHz 41 46 dB 305 - 310 MHz 27 30 dB 310 - 313 MHz 15 17 dB 313 - 314 MHz 6 8 dB 316.5 - 320 MHz 20 24 dB 320 - 325 MHz 15 18 dB 325 - 335 MHz 33 35 dB 335 - 600 MHz 43 45 dB 600 - 1000 MHz 55 60 dB Temperature Freq. Temp. Coefficient FTC 0.032 ppm/C2 Frequency Aging Absolute Value during the First Year lfAl 10 ppm/yr Impedance @ fc Input ZIN=RINllCIN ZIN 5.0ohms//2.2pf Output ZOUT=ROUTllCOUT ZOUT 9.3ohms//1.7pf

Rating	Value	Units
Incident RF Power	10	dBm
DC Voltage	12	VDC
Storage Temperature	-40 to +125
Operable Temperature Range	-40 to +125
Soldering Temperature (10 seconds / 5 cycles max.)	260

Description

Ideal Front-End Filter RF1211D for Domestic Wireless Receivers Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Complies with Directive 2002/95/EC (RoHS)

The RF1211D is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide front-end selectivity in 315.0 MHz receivers. Receiver designs using RF1211D include superhet with 10.7 MHz or 500 kHz IF, direct conversion and superregen. Typical applications of RF1211D are wireless remote-control and security devices (especially for automotive keyless entry) operating in the USA under FCC Part 15, in Canada under RSS-210, and in Italy

This coupled-resonator filter (CRF) RF1211Duses selective null placement to provide suppression, typically greater than 40 dB, of the LO and image spurious responses of superhet receivers with 10.7 MHz IF. RFM's advanced SAW design and fabrication technology of RF1211D is utilized to achieve high performance and very low loss with simple external impedance matching.