RF1210

Features:

• Ideal Front-End Filter for 303.825 MHz Wireless Receivers
• Low-Loss, Coupled-Resonator Quartz Design
• Simple External Impedance Matching
• Rugged TO39 Hermetic Package
• Complies with Directive 2002/95/EC (RoHS)




Specifications

Characteristic Symbol Minimum Typical Maximum Units Center Frequency at 25C Absolute Frequency fC 303.745 303.905 MHz Tolerance from 303.825 DfC 80 kHz Insertion Loss IL 1.7 3.0 dB 3 dB Passband 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 -35 +85 C Turnover Temperature TO 37 52 67 C Turnover Frequency fO fC+7 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 87 Shunt Capacitance C 9 pF

Rating	Value	Units
Incident RF Power	+13	dBm
DC Voltage Between Any Two Pins (Observe ESD Precautions)	±30	VDC
Case Temperature5	-40 to +85

Description

Ideal Front-End Filter RF1210 for 303.825 MHz Wireless Receivers Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Rugged TO39 Hermetic Package Complies with Directive 2002/95/EC (RoHS)

The RF1210 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 RF1210 include superhet with 10.7 MHz or 500 kHz IF, direct conversion and superregen. Typical applications of RF1210 are wireless remote-control and security devices operating in the USA under FCC Part 15, in Australia, in Japan, and in Korea.

This coupled-resonator filter (CRF) RF1210 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 ofRF1210 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.