RF1181

Features:

• Ideal Front-End Filter for 916.5 MHz Wireless Receivers
• Low-Loss, Coupled-Resonator Quartz Design
• Simple External Impedance Matching
• Rugged TO39 Hermetic Package
• Complies with Directive 2002/95/EC (RoHS)




Pinout






Specifications

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

Characteristic Symbol Minimum Typical Maximum Units Center Frequency at 25C Absolute Frequency fC 916.400 916.500 916.600 MHz Tolerance from 916.500 MHz ?fC 100 kHz Insertion Loss IL 4 5 dB 3 dB Bandwidth BW3 600 750 1000 kHz Rejection at fC - 21.4 MHz (Image) 33 40 dB at fC - 10.7 MHz (LO) 15 37 dB Ultimate 80 dB Temperature Operating Case Temp. TC -40 +85 C Turnover Temperature TO 25 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 Coilcraft 8.2 nH Chip Inducto nH Shunt Capacitance C 1 5 pF




Description

The RF1181 is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide front-end selectivity in 916.5 MHz receivers. Receiver designs using RF1181 include superhet with 10.7 MHz or 500 kHz IF, direct conversion and superregen. Typical applications of RF1181 are wireless remote-control and security devices operating in the USA under FCC Part 15 and in Canada under DoC RSS-210.

This coupled-resonator filter RF1181 (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 RF1181 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.

Ideal Front-End Filter RF1181 for 916.5 MHz Wireless Receivers Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Rugged TO39 Hermetic Package Complies with Directive 2002/95/EC (RoHS)