TFS270A1

Features:






Specifications






Description

      This is the description about TFS 270A1 of the VI TELEFILTER SAW filter specification. Reference level for the relative attenuation arel of the TFS 270A1 is the minimum of the pass band attenuation amin. The minimum of the pass band attenuation amin is defined as the insertion loss ae.The nominal frequency fN is fixed on 270,000 MHz without tolerance. The values of the pass band ripple and the relative attenuation arel are guaranteed in the whole operating temperature range. The frequency shift of the filter in the operating temperature range is included in the measurement tolerance scheme.
      Here are the features of TFS270A1: Ambient temperature is 23°C. Input power level is 0dBm. Terminating impedances for input is 510|| -1.75 pF; for output is 510|| -1.75 pF. Ext. coil pin4 is 82 nH.
      The absolute Maximum Ratings of TFS270A1 are these (TA = 25°C). Insertion loss (Reference level) is max 5 dB. Nominal frequency is 270,000 MHz. Pass band ripple (fN - 70 kHz ... fN + 70 kHz) is max 2 dB and (fN - 90 kHz ... fN + 90 kHz) is max 3 dB. Group delay distortion is max 2s. Operating temperature range is from - 20°C to +85°C. Storage temperature range is from - 30 °C to + 85 °C. Temperature coefficient of frequency is - 0,036ppm/K2. Frequency inversion temperature is +25°C.
      These are Stability characteristics of TFS270A1. After the following tests the filter shall meet the whole specification: (1). Shock: 100g, 18 ms, half sine wave, 3 shocks each plane; IEC 68 - 2 27. (2). Vibration: 10 Hz to 500 Hz, 0.35 mm amplitude, 5g; 2 hours for 3 planes; IEC 68 - 2 6. (3). Damp heat: 90 % to 95 % rel. humidity, 40 °C, 10 days; IEC 68 - 2 3,(4). Resistance to solder heat (Reflow): 260 °C for 10 sec.
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