RF1211

Bandwidth :
Impedance :
Operating Temperature Range : - 40 C to + 85 C
Packaging : Reel
Product : SAW Filters
Termination Style : Radial
Frequency : 315 MHz
Voltage Rating : 30 V
Package / Case : TO-39-3
Frequency Range : 314.92 MHz to 315.8 MHz


Features:

• Ideal Front-End Filter for USA Automotive Wireless Receivers
• Low-Loss, Coupled-Resonator Quartz Design
• Simple External Impedance Matching
• Rugged TO39 Hermetic Package




Pinout






Specifications

Characteristic Symbol Minimum Typical Maximum Units Center Frequency at 25C Absolute Frequency fc 314.92 315.00 315.080 MHz Tolerance from 315.0 MHz Dfc 80 dB Insertion Loss IL 1.7 3.0 dB 3 dB Bandwidth BW3 500 700 800 kHz Rejection at fc - 21.4 MHz (Image) 40 50 dB at fc - 10.7 MHz (LO) 15 40 dB Ultimate 80 dB Temperature Operating Case Temp. TC -40 +85 C Turnover Temperature TO 22 37 52 C Turnover Frequency fO fc MHz Freq. Temp. Coefficient FTC 0.032 ppm/C2 Frequency Aging Absolute Value during the First Year |fA| 10 ppm/yr External Impedance Series Inductance L 86 nH (Pin 1) 82 nH (Pin 2) Shunt Capacitance C 9 pF

Rating	Value	Units
Incident RF Power	+13	dBm
DC Voltage between any 2 pins (Observe ESD Precautions)	±30	VDC
Case Temperature	-40 to +85

Description

Ideal Front-End Filter RF1211 for USA Automotive Wireless Receivers Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Rugged TO39 Hermetic Package Complies with Directive 2002/95/EC (RoHS)

The RF1211 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 RF1211 include superhet with 10.7 MHz or 500 kHz IF, direct conversion and superregen. Typical applications of RF1211 are wireless remote-control and security devices (especially for automotive keyless entry) operating in the USA under FCC Part 15, in Canada under DOC RSS-210, and in Italy.

This coupled-resonator filter RF1211 (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 of RF1211 is utilized to achieve high performance and very low loss with simple external impedance matching (not included). Quartz construction provides excellent frequency stability over a wide temperature range.