LTC1064-7 Linear Phase, 8th Order Lowpass Filter FEATURES DESCRIPTIO Steeper Roll-Off Than 8th Order Bessel Filters The LTC 1064-7 is a clock-tunable monolithic 8th order f up to 100kHz lowpass filter with linear passband phase and flat group CUTOFF Phase Equalized Filter in 14-Pin Package delay. The amplitude response approximates a maximally Phase and Group Delay Response Fully Tested flat passband while it exhibits steeper roll-off than an Transient Response Exhibits 5% Overshoot and equivalent 8th order Bessel filter. For instance, at twice the No Ringing cutoff frequency the filter attains 34dB attenuation (vs Wide Dynamic Range 12dB for Bessel), while at three times the cutoff frequency, 72dB THD or Better Throughout a 50kHz Passband the filter attains 68dB attenuation (vs 30dB for Bessel). No External Components Needed The cutoff frequency of the LTC1064-7 is tuned via an Available in 14-Pin DIP and 16-Pin SO Wide external TTL or CMOS clock. Packages The LTC1064-7 features wide dynamic range. With single 5V supply, the S/N + THD is 76dB. Optimum 92dB S/N is U obtained with 7.5V supplies. APPLICATIO S The clock-to-cutoff frequency ratio of the LTC1064-7 can Data Communication Filters + be set to 50:1 (Pin 10 to V ) or 100:1 (Pin 10 to V ). Time Delay Networks When the filter operates at clock-to-cutoff frequency ratio Phase-Matched Filters of 50:1, the input is double-sampled to lower the risk of aliasing. The LTC1064-7 is pin-compatible with the LTC1064-X series, LTC1164-7 and LTC1264-7. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATIO Eye Diagram 80kHz Linear Phase Lowpass Filter 1 14 2 13 V IN 3 12 7.5V 4 11 7.5V LTC1064-7 CLK = 4MHz 5 10 7.5V 6 9 V OUT 7 8 1064-7 TA01 NOTE: THE POWER SUPPLIES SHOULD BE BYPASSED BY A 0.1F CAPACITOR CLOSE TO THE PACKAGE AND ANY PRINTED 1064-7 TA02 V = 7.5V 1s/DIV S CIRCUIT BOARD ASSEMBLY SHOULD MAINTAIN A DISTANCE f = 4MHz CLK OF AT LEAST 0.2 INCHES BETWEEN ANY OUTPUT OR INPUT RATIO = 50:1 PIN AND THE f LINE. CLK 10647fb 1 1V/DIV U ULTC1064-7 AB OLUEXAI U RAT GS (Note 1) S T I + Operating Temperature Range Total Supply Voltage (V to V ) .......................... 16.5V LTC1064-7C ....................................... 40C to 85C Power Dissipation............................................. 400mW LTC1064-7M OBSOLETE ..............55C to 125C Burn-In Voltage ................................................... 16.5V + Lead Temperature (Soldering, 10 sec)................. 300C Voltage at Any Input ..... (V 0.3V) V (V + 0.3V) IN Storage Temperature Range ................ 65C to 150C PACKAGE/ORDER I FOR ATIO TOP VIEW ORDER PART ORDER PART TOP VIEW 1 R (A) NC 14 IN NUMBER NUMBER NC 1 16 R (A) IN 2 NC V 13 IN V 2 15 NC IN 3 V GND 12 GND 3 14 V + 4 f V 11 LTC1064-7CN LTC1064-7CSW CLK + V 4 13 NC 5 50/100 GND 10 GND 5 12 f CLK 6 V LP (A) 9 OUT NC 6 11 50/100 7 NC INV (A) 8 LP (A) 7 10 NC N PACKAGE INV (A) 8 9 V OUT 14-LEAD PLASTIC DIP T = 110C, = 65C/W (N) JMAX JA SW PACKAGE J PACKAGE 14-LEAD CERAMIC DIP 16-LEAD PLASTIC SO (WIDE) LTC1064-7CJ T = 150C, = 65C/W (J) JMAX JA T = 110C, = 85C/W JMAX JA LTC1064-7MJ OBSOLETE PACKAGE Consider the N Package as an Alternate Source Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: