SF401中文资料

401.750 MHz SAW Filter

Phone: +86 10 6301 4184 Fax: +86 10 6301 9167 Email: sales@https://www.wendangku.net/doc/8811466303.html, Web: https://www.wendangku.net/doc/8811466303.html, May 11, 2000 Vanlong Technology Co., Ltd.

? Ideal Front-End Filter for European Wireless Receivers ? Low-Loss, Coupled-Resonator Quartz Design ? Simple External Impedance Matching

? Rugged, Hermetic, Low Profile TO-39 Package

Absolute Maximum Rating (Ta=25°C)

Parameter

Rating Unit CW RF Power Dissipation + 0 dBm DC Voltage V DC

± 30 V Operating T emperature Range -10 ~ +65 °C Storage T emperature Range -35 ~ +85

°C

Specifications

Parameter

Sym Minimum Typical Maximum

Unit Frequency (25°C) Nominal Frequency

T olerance from 401.750 MHz fc ?fc NS - 401.750 ±75 NS - MHz KHz Insertion Loss IL - 2.5 5.0 dB 3dB Bandwidth

BW 3 - 600 - KHz Temperature Stability Turnover T emperature Turnover Frequency

Frequency T emperature Coefficient T o fo FTC 15 - - 25 Fc+2.7 0.037 35 - - °C KHz ppm/°C Frequency Aging Absolute Value during the First Year |f A | - - 10 ppm/yr DC Insulation Resistance Between any Two Pins - 1.0 - - M ? Attenuation fc – 21.4MHz (Image) Fc – 10.7MHz (LO) Ultimate - - -

40 15 -

50

30 80

- - -

dB dB dB

NS = Not Specified

Notes

Package Outline (TO-39-3)

SF401

1. Frequency aging is the change in fc 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.

2. Unless noted otherwise, all measurements are made with the filter installed

in the specified test fixture, which is connected to a 50 ? test system (VSWR ≤ 1.2:1). The test fixture’s L and C are adjusted for minimum insertion loss at the filter center frequency. fc Note the insertion loss, bandwidth, and passband shape are dependent on the impedance matching component values and quality. The optimum impedance matching component values are dependent on circuit parasitic losses.

3. The frequency fc is defined as the midpoint between the 3dB frequency.

4. Unless notes otherwise, specifications\ apply over the entire specified

operating temperature range.

5. The design, manufacturing process, and specifications of this device are

subject to change without notice.

6. The turnover temperature, To is the temperature of maximum (or

turnover) frequency, fc the nominal frequency at any case temperature, TC, may be calculated from : f = fc [ 1- FTC(To-Tc)2].

Pin Connection 1 Input/Output 2 Output/Input 3

Ground

All dimensions are in mm