Specify 8 7 Pin Connections 2 1 8.2 4.3 3 1 = Input 2 = Ground 3 = Output 2.7 4 To take the best advantage of the safety feature of ceramic filters, connect output to anIF amplifier through a DC cut capacitor. Avoid directly applying DC to output end of ceramic filters (Between 5 & 2,3,4) APPLICATIONS FEATURES Communications Equipment High Selectivity Low Cost Wide Range of bandwidths Available Industry Standard Outline & Pinout SPECIFICATION Insertion Pass Band 6 dB 40 dB Part Centre Loss Ripple Bandwidth Bandwidth Numb er Freq (M Hz) (dB Max) (dB Max) (kHz Min) (kHz Min) LTU455B2 455 +/ -2.0 4 2 + / - 15 .0 +/ -30.0 LTU455C2 455 +/ -2.0 4 2 + / - 12 .5 +/ -24.0 LTU455D2 455 +/ -1.5 4 2 + / - 10 .0 +/ -20.0 LTU455E2 455 +/ -1.5 6 2 + / 7 .5 + / - 15 .0 F R E Q U E N C Y C H A R A C T E R I S T I C S LTU455F2 455 +/ -1.5 6 2 + / - 6 .0 + / - 12 .5 LTU455G2 455 +/ -1.5 6 2 + / - 4 .5 + / - 10 .0 LTU455H2 455 +/ -1.0 6 2 + / - 3 .0 + / - 9 .0 LTU455I2 455 +/ -1.0 6 2 + / - 2 .0 + / - 7 .5 LTU455HT 455 +/ -1.0 6 2 + / - 3 .0 + / - 9 .0 Frequency Characteristics Test Circuit Stopband Att. + / -100kHz (dB M in ) 27 27 27 27 27 25 25 25 35 1 0 Attenuation (dB) Ceramic Filters Ceramic Filter LTU Series 455kHz or 450kHz R1 LTU 455B2 LTU 455E2 LTU 455H2 10 20 Input/Output Impedence ( ) 1500 1500 1500 1500 2000 2000 2000 2000 2000 3 LTU 2 Rg 30 R2 C RF V.M 40 S.S.G 50 60 400 410 420 430 440 450 460 470 480 490 500 Rg+R1+R2=input/Output Impedence C=10pF (Including strays and input/output capacitance of RF Voltmeter Freq (kHz) www.aelcrystals.co.uk q u a r t z b a s e d f r e q u e n c y c o n t r o l c o m p o n e n t s www.aelcrystals.co.uk [email protected] Order Hotline +44 1293 524245 44 Specify Ceramic Filter LTW33 Series 450 kHz & 455kHz Pin Connections 2.9 2.9 2.6 4 3 2 1 = Input 2 = Ground 3 = Ground 4 = Ground 5 = Output 1 4.3 5 33-455D Ceramic Filters 11.3 7 2.0 To take the best advantage of the safety feature of ceramic filters, connect output to anIF amplifier through a DC cut capacitor. Avoid directly applying DC to output end of ceramic filters (Between 5 & 2,3,4) APPLICATIONS FEATURES Communications Equipment High Selectivity Low Cost Wide Range of bandwidths Available Industry Standard Outline SPECIFICATION Insertion Pass Band Part Centre Loss Ripple Numb er Freq (M Hz) (dB Max) (dB Max) LTW33-455B 455 +/ -2.0 4 2 LTW33-455C 455 +/ -2.0 4 2 LTW33-455D 455 +/ -1.5 4 2 LTW33-455E 455 +/ -1.5 6 2 F R E Q U E N C Y C H A R A C T E R I S T I C LTW33-455F 455 +/ -1.5 6 2 LTW33-455G 455 +/ -1.5 6 2 LTW33-455H 455 +/ -1.0 6 2 LTW33-455I 455 +/ -1.0 6 2 LTW33-455HT 455 +/ -1.0 6 2 Frequency Characteristics 6 dB Bandwidth (kHz Min) +/-15.0 +/-12.5 +/-10.0 +/- 7.5 S +/- 6.0 +/- 4.5 +/- 3.0 +/- 2.0 +/- 3.0 40 dB Bandwidth (kHz Min) +/ -30.0 +/ -24.0 +/ -20.0 +/-15.0 +/-12.5 +/-10.0 +/- 9.0 +/- 7.5 +/- 9.0 Stopband Att. +/ -100kHz (dB M in ) 35 35 35 35 35 35 35 35 60 Input/Output Impedence ( ) 1500 1500 1500 1500 2000 2000 2000 2000 2000 Test Circuit R1 1 5 LTW Attenuation (dB) 0 2 LTW33-455B 10 4 3 LTW33-455D 20 LTW33-455H 30 Rg R2 C 40 RF V.M 50 S.S.G 60 400 410 420 430 440 450 460 470 480 490 500 Freq (kHz) Rg+R1+R2=input/Output Impedence C=10pF (Including strays and input/output capacitance of RF Voltmeter www.aelcrystals.co.uk q u a r t z b a s e d f r e q u e n c y c o n t r o l c o m p o n e n t s www.aelcrystals.co.uk [email protected] Order Hotline +44 1293 524245 45