TFS451A

      The TFS451A is designed as VI telefilter.The minimum attenuation in the pass band is defined as the insertion loss ae. The nominal frequency fN is fixed at 451,25 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.
      Some TFS451A important specifications have been concluded into several points as follow.The first one is about its insertion loss which would be typ 1.8dB and max 3dB.The next one is about its nominal frequency which would be max 451.25MHz.The next one is about its amplitude ripple which would be typ 0.3dB and max 1dB. The next one is about its absolute attenuation which would be typ 49dB and min 40dB for fN - 441.0MHz to fN - 4.25MHz and would be typ 40dB and min 35dB for fN - 4.25MHz to fN - 1.25MHz and would be typ 41dB and min 20dB with condition of fN + 1.75MHz to fN + 4.75MHz and would be typ 42dB and min 40dB for fN + 4.75MHz to fN + 548.0MHz.The next one is about its operating temperature range which would be from -20°C to +70 °C.The next one is about its storage temperature range which would be from -40°C to + 85° C.The next one is about its frequency inversion temperature which would be typ 28°C.The next one is about its temperature coefficient of frequency which would be typ -0,034 ppm/K2. Something should be noted that The terminating impedances depend on parasitics and q-values of matching elements and the board used, and are to be understood as reference values only. Should there be additional questions do not hesitate to ask for an application note or contact our design team. And so on. For more information please contact us.