Tel : +44 118 979 1238 Fax : +44 118 979 1283 Email: [email protected] The ACTF303.875/303.875/TO39 is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter in a low-profile metal TO-39 case designed to provide front-end selectivity in 303.875 MHz receivers. Receiver designs using this filter include superhet with 10.7 MHz or 500 kHz IF, direct conversion and superregen. 1.Package Dimension (TO-39) 2. Pin Configuration 1 Input / Output 2 Output / Input 3 Case Ground Dimension Data (unit: mm) A 9.30±0.20 B 5.08±0.10 C 3.40±0.20 D 3±0.20⁄5±0.20 E 0.45±0.20 3.Test Circuit In keeping with our ongoing policy of product evolvement and improvement, the above specification is subject to change without notice. ISO9001: 2000 Registered - Registration number 6830/2 For quotations or further information please contact us at: 3 The Business Centre, Molly Millars Lane, Wokingham, Berks, RG41 2EY, UK http://www.actcrystals.com Issue : 1 C1 Date : SEPT 04 Tel : +44 118 979 1238 Fax : +44 118 979 1283 Email: [email protected] 4.Typical Frequency Response 5.Performance 5-1.Maximum Rating Rating Value Unit CW RF Power Dissipation P +10 dBm DC Voltage Between Any Two Pins VDC ±30 V Storage Temperature Range Tstg -40 to +85 °C Operating Temperature Range TA -10 to +60 °C In keeping with our ongoing policy of product evolvement and improvement, the above specification is subject to change without notice. ISO9001: 2000 Registered - Registration number 6830/2 For quotations or further information please contact us at: 3 The Business Centre, Molly Millars Lane, Wokingham, Berks, RG41 2EY, UK http://www.actcrystals.com Issue : 1 C1 Date : SEPT 04 Tel : +44 118 979 1238 Fax : +44 118 979 1283 Email: [email protected] 5-2.Electronic Characteristics Characteristic Minimum Centre Frequency (Centre frequency between 3dB points) fC Insertion Loss IL 3dB Bandwidth BW3 Rejection Temperature Typical Maximum 303.875 -- MHz 3.0 4.5 dB 600 800 kHz at fC -21.4MHz (Image) 40 50 -- at fC -10.7MHz (LO) 20 30 -- Ultimate -- 60 -- Turnover Temperature TO Turnover Frequency fO Frequency Temperature Coefficient Frequency Aging Absolute Value during the First Year Unit 25 dB °C 55 fC MHz FTC 0.032 ppm/°C | fA| 10 ppm/yr 2 iCAUTION: Electrostatic Sensitive Device. Observe precautions for handling! 1. 2. 3. 4. 5. 6. 7. 8. The frequency fC is defined as the midpoint between the 3dB frequencies. Unless noted otherwise, all measurements are made with the filter installed in the specified test fixture that is connected to a 50Ω test system with VSWR≤1.2:1. The test fixture L and C are adjusted for minimum insertion loss at the filter centre frequency, f C. Note that insertion loss, bandwidth, and passband shape are dependent on the impedance matching component values and quality. Unless noted otherwise, specifications apply over the entire specified operating temperature range. Frequency aging is the change in f C with time and is specified at +65°C or less. Aging may exceed the specification for prolonged temperatures above +65°C. Typically, aging is greatest the first year after manufacture, decreasing in subsequent years. Turnover temperature, T0, is the temperature of maximum (or turnover) frequency, f 0. The nominal frequency 2 at any case temperature, T C, may be calculated from: f = f 0 [1 - FTC (T 0 - TC) ]. The specifications of this device are based on the test circuit shown above and subject to change or obsolescence without notice. All equipment designs utilizing this product must be approved by the appropriate government agency prior to manufacture or sale. Our liability is only assumed for the Surface Acoustic Wave (SAW) component(s) per se, not for applications, processes and circuits implemented within components or assemblies. In keeping with our ongoing policy of product evolvement and improvement, the above specification is subject to change without notice. ISO9001: 2000 Registered - Registration number 6830/2 For quotations or further information please contact us at: 3 The Business Centre, Molly Millars Lane, Wokingham, Berks, RG41 2EY, UK http://www.actcrystals.com Issue : 1 C1 Date : SEPT 04