Features: SpecificationsDescriptionThis is the description about TFS 1842A of the VI RELEFILTER development specification. The maximum attenuation in the pass band is defined as the insertion loss ae. The nominal frequency fN is fixed at 1842,5 MHz without any tolerance or limit. The values of absolute attenuation aabs are guaranteed for the whole operating temperature range. The frequency shift of the filter in the operating temperature range is included in the production tolerance scheme.
Here are the features of TFS1842A: Ambient temperature is 23°C. Input power level is 13 dBm. Terminating impedances for input is 50 (unbalanced); for output is 50// 1pF (balanced).
The absolute maximum ratings of TFS1842A are these (TA = 25°C). Insertion loss (Reference level) is max. 4,3 dB. Nominal frequency is1842,5 MHz. Centre frequency is 1842,5 MHz. Pass band at ambient temperature is fN 37,5 MHz. Pass-band ripple within PB is max 2,3 dB. Amplitude variation within PB is max. 1,5 dB. Group delay ripple is max. 75 ns. Operating temperature range is from - 10°C to +75°C. Storage temperature range is from - 40 °C to + 85 °C. Temperature coefficient of frequency is t.b.d. Input power level is max 5 dBm.
These are the stability characteristics of TFS1842A. After the following tests the filter shall meet the whole specification: (1). Shock: 500g, 18 ms, half sine wave, 3 shocks each plane; DIN IEC 68 T2 27. (2). Vibration: 10 Hz to 500 Hz, 0,35 mm or 5g respectively, 1 octave per min, 10 cycles per plan, 3 plans; DIN IEC 68 T2 6. (3). Change of -55 °C to 125°C / 30 min. each / 10 cycles temperature: DIN IEC 68 part 2 14 Test N. (4). Resistance to solder heat (reflow): reflow possible: twice max.; for temperature conditions, please refer to the attached "Air reflow temperature conditions".
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TFS1842A Data Sheet
