TFS254A

www.DataSheet4U.com TFS254A.doc version 1.1 16.03.2001 VI TELEFILTER Measurement condition Ambient temperature: 23 °C Input power level: 0 dBm Terminating impedances for input: 625 Ω // -6,1 pF for output: 340 Ω // -8,5 pF Filter Specification TFS 254 A 1/5 Characteristics Remark: Reference level for the relative attenuation arel of the TFS 254 A 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 centre frequency fc is the arithmetic mean value of the upper and lower frequencies at the 3 dB filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed on 254,4 MHz without tolerance. The given values for the relative attenuation arel and for the group delay ripple have to be reached at the frequencies given below also if the centre frequency fc is shifted due to the temperature coefficient of frequency TCf in the operating temperature range and due to a production tolerance for the centre frequency fc. Data Insertion loss (Reference level) Nominal frequency Centre frequency 1 dB bandwidth Relative attenuation fN ± 700 kHz ... fN ± fN ± 3 MHz ...fN ± Group delay ripple fN ± 190 kHz Input power level Operating temperature range Storage temperature range Temperature coefficient of frequency Frequency inversion temperature TC ae = amin fN typ. value 5,7 dB 254,412 MHz BW arel 3 MHz 30 MHz GD - tolerance/limit max. 14 dB 254,400 MHz min. min. min. max. m...