LTC1069-7 Linear Phase 8th Order Lowpass Filter cutoff frequency of the LTC1069-7 is set by an external FEATURES clock and is equal to the clock frequency divided by 25. n 8th Order, Linear Phase Filter in SO-8 Package The ratio of the internal sampling frequency to the cutoff n Raised Cosine Amplitude Response frequency is 50:1 that is, the input signal is sampled n 43dB Attenuation at 2 f twice per clock cycle to lower the risk of aliasing. The CUTOFF n Wideband Noise: 140V LTC1069-7 can be operated from a single 5V supply up RMS n Operates from Single 5V Supply to to dual 5V supplies. 5V Power Supplies The gain and phase response of the LTC1069-7 can be n Clock-Tunable to 200kHz with 5V Supplies used in digital communication systems where pulse n Clock-Tunable to 120kHz with Single 5V Supply shaping and channel bandwidth limiting must be carried out. Any system that requires an analog lter with linear phase and sharper roll off than conventional Bessel lters APPLICATIONS can use the LTC1069-7. n Digital Communication Filter The LTC1069-7 has a wide dynamic range. With 5V n Antialiasing Filter with Linear Phase supplies and an input range of 0.1V to 2V , the RMS RMS n Smoothing Filters signal-to-(noise + THD) ratio is 60dB. The wideband noise of the LTC1069-7 is 140V . Unlike other LTC1069-X lters, RMS DESCRIPTION the typical passband gain of the LTC1069-7 is equal to 1V/V. The LTC 1069-7 is a monolithic, clock-tunable, linear The LTC1069-7 is available in an SO-8 package. phase, 8th order lowpass lter. The amplitude response Other lter responses with lower power/speed speci cations of the lter approximates a raised cosine lter with an can be obtained. Please contact LTC Marketing. alpha of one. The gain at the cutoff frequency is 3dB and L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. the attenuation at twice the cutoff frequency is 43dB. The TYPICAL APPLICATION Frequency Response 10 Single 5V Supply, Linear Phase 100kHz Lowpass Filter 0 AGND V V OUT OUT 10 5V + 20 0.47F V V 0.1F LTC1069-7 30 NC NC 40 f = 2.5MHz V V CLK IN IN CLK 50 1069-7 TA01 60 70 10 100 1000 FREQUENCY (kHz) 1069-7 TA02 10697fa 1 GAIN (dB)LTC1069-7 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION + Total Supply Voltage (V to V ) ............................... 12V TOP VIEW Power Dissipation .............................................. 400mW AGND 1 8 V OUT Operating Temperature Range + V 2 7 V LTC1069-7C ............................................ 0C to 70C NC 3 6 NC LTC1069-7I ......................................... 40C to 85C V 4 5 CLK IN Storage Temperature ..............................65C to 150C S8 PACKAGE Lead Temperature (Soldering, 10 sec) .................. 300C 8-LEAD PLASTIC SO T = 125C, = 130C/W JMAX JA ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1069-7CS8 PBF LTC1069-7CS8 TRPBF 10697 8-Lead Plastic SO 0C to 70C LTC1069-7IS8 PBF LTC1069-7IS8 TRPBF 10697I 8-Lead Plastic SO 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: