LTM455IU

LTM455U SERIES 4 ELEMENT CERAMIC FILTER Ultra small size high selectivity type ceramic filter for communication use. FEATURES • Ultra small size • 6.5 mm profile • Bandwidths from 4KHz to 30KHz available • RoHS Compliant (Note 7 exemption) • 4 elements OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS PART NUMBER LTM455BU LTM455CU LTM455DU LTM455EU LTM455FU LTM455GU LTM455HU LTM455IU LTM45HTU LTM45ITU CENTER FREQUENCY (KHz) 455 455 455 455 455 455 455 455 455 455 ±2.0 ±2.0 ±1.5 ±1.5 ±1.5 ±1.0 ±1.0 ±1.0 ±1.0 ±1.0 INSERTION LOSS (dB) MAX. 4 4 4 6 6 6 6 6 6 6 PASS BAND RIPPLE (dB) MAX. 2 2 2 2 2 2 2 2 2 2 6 dB BANDWIDTH (KHz) MIN. ±15 ±12.5 ±10 ±7.5 ±6 ±4.5 ±3 ±2 ±3 ±2 40 dB BANDWIDTH (dB) MAX. ±30 ±24 ±20 ±15 ±12.5 ±10 ±9 ±7.5 ±9 ±7.5 STOP BAND ATT. ±100KHZ (dB) MIN. 27 27 27 27 27 25 25 25 35 35 INPUT / OUTPUT IMPEDANCE (Ω) 1500 1500 1500 1500 2000 2000 2000 2000 2000 2000 PACKAGE DIMENSIONS (mm) 7 7 INPUT OUTPUT R1 1 2 LTMU 6.5 3 4 GROUND Rg GROUND R2 S.S.G. 4 RF V.M. 0.8 Rg+R1=R2=input/output impedance 2.4 1.8 0.8 4.3 Figure 2) LTM455U – Measuring Circuit 1 2 0 Connection 1 Input 10 LTM455BU LTM455EU 4.3 2 Output 3 Ground 4 Ground Attenuation (dB) 20 30 40 50 LTM455HU 3 4 2.4 1.8 0.8 Figure 1) LTM455U – Front, Side and Bottom views 60 410 420 430 440 450 460 470 480 490 500 Frequency (KHz) Note: To avoid potential problems, connect the output to an IF amplifier through a DC cut capacitor. Avoid applying a direct current to output end of the ceramic filters (between ➂ and xy). Figure 3) LTM455U – Characteristics ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM CERAMIC FILTERS 80 CERAMIC FILTERS