LTC1264-7CSW#PBF Analog Devices

LLTTCC11264-7264-7 Linear Phase, Group Delay Equalized, 8th Order Lowpass Filter FEATURES DESCRIPTIO Steeper Roll-Off Than Bessel Filters The LTC1264-7 is a clock-tunable monolithic 8th order High Speed: f 200kHz lowpass filter with linear passband phase and flat group C Phase Equalized Filter in a 14-Pin Package delay. The amplitude response approximates a maximally Phase and Group Delay Response Fully Tested flat passband and exhibits steeper roll-off than an equiva- Transient Response Exhibits 5% Overshoot and lent 8th order Bessel filter. For instance, at twice the cutoff No Ringing frequency, the filter attains 28dB attenuation (vs 12dB for 65dB THD or Better Throughout a 100kHz Passband Bessel), while at three times the cutoff frequency, the filter No External Components Needed attains 55dB attenuation (vs 30dB for Bessel). Available in Plastic 14-Pin DIP and 16-Pin SO The cutoff frequency of the LTC1264-7 is tuned via an Wide Packages external TTL or CMOS clock. The clock-to-cutoff frequency ratio of the LTC1264-7 can be set to 25:1 (pin U + 10 to V ) or 50:1 (pin 10 to V ). When the filter operates APPLICATIO S at clock-to-cutoff frequency ratio of 25:1, the input is Data Communication Filters double-sampled to lower the risk of aliasing. Time Delay Networks The LTC1264-7 is optimized for speed. Depending on the Phase Matched Filters operating conditions, cutoff frequencies between 200kHz , LTC and LT are registered trademarks of Linear Technology Corporation. and 250kHz can be obtained. (Please refer to the Passband All other trademarks are the property of their respective owners. vs Clock Frequency graphs.) The LTC1264-7 is pin-compatible with the LTC1064-X series. TYPICAL APPLICATIO 4-Level PAM Eye Diagram 200kHz Linear Phase Lowpass Filter 1 14 2 13 V IN 3 12 8V 4 11 8V LTC1264-7 f = 5MHz CLK 5 10 8V 6 9 V OUT 7 8 1264-7 TA01 NOTE: THE POWER SUPPLIES SHOULD BE BYPASSED BY A 0.1F CAPACITOR CLOSE TO THE PACKAGE AND ANY PRINTED CIRCUIT BOARD ASSEMBLY SHOULD MAINTAIN A DISTANCE 1264-7 TA02 500ns/DIV OF AT LEAST 0.2 INCHES BETWEEN ANY OUTPUT OR INPUT f = 5MHz CLK PIN AND THE f LINE. CLK f = 200kHz C 12647fa 1 1V/DIV U ULTC1264-7 (Note 1) ABSOLUTEXAI U RATI GS + Operating Temperature Range Total Supply Voltage (V to V ) .......................... 16.5V LTC1264-7C ...................................... 40C to 85C Power Dissipation............................................. 400mW LTC1264-7M (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 NC 1 14 OUT (C) NUMBER NUMBER TOP VIEW V 2 13 NC IN NC 1 16 OUT (C) LTC1264-7CN LTC1264-7CSW GND 3 12 V V 2 15 NC IN + V 4 11 f CLK GND 3 14 V NC 5 10 25/50 + V 4 13 NC LP (A) 6 9 V OUT NC 5 12 f CLK R (A) 7 8 NC IN NC 6 11 25/50 N PACKAGE LP (A) 7 10 NC 14-LEAD PLASTIC DIP R (A) 8 9 V IN OUT T = 110C, = 65C/W (N ) JMAX JA J PACKAGE SW PACKAGE LTC1264-7CJ 14-LEAD CERAMIC DIP 16-LEAD PLASTIC SO WIDE LTC1264-7MJ T = 150C, = 65C/W (J ) JMAX JA T = 110C, = 85C/W JMAX JA OBSOLETE PACKAGE Consider the N14 Package for Alternate Source Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: