RF1210D

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 @ 25C Absolute Frequency fc 303.825 MHz Minimum I.L. (303.620~303.980 MHz) ILmin 1.6 2.5 dB Passband (relative to ILmin) 303.595 - 304.025 1.0 3.0 dB 303.535 - 304.085 1.5 6.0 dB Pass Bandwidth (relative to ILmin) BW3 500 650 800 kHz Attenuatioin: (relative to ILmin) 10~260 MHz 45 50 dB 260~297 MHz 35 40 dB 297~302.5 MHz 11.5 15 dB 304.8~320 MHz 14 18 dB 320~400 MHz 37 40 dB 400~1000 MHz 45 50 dB Frequency Temperature Coefficient FTC 0.032 ppm/C2 Frequency Aging Absolute Value during the First Year |fA| 10 ppm/yr Impedance @ FC Input ZIN=RINllCIN ZIN 22.6W ll 2.6pf Output ZOUT=ROUTllCOUT ZOUT 21.5W ll 3.1pf




Description

The RF1210D is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide front-end selectivity in 303.825 MHz receivers. Receiver designs using RF1210D include superhet with 10.7 MHz or 500 kHz IF, direct conversion and superregen. Typical applications of RF1210D 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 RF1210D (CRF) uses 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 ofRF1210D is utilized to achieve high performance and very low loss with simple external impedance matching.

Ideal Front-End Filter RF1210D for Domestic Wireless Receivers Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Complies with Directive 2002/95/EC (RoHS)