DELAY (s) LTC1164-7 Low Power, Linear Phase 8th Order Lowpass Filter FEATURES DESCRIPTIO Better Than Bessel Roll-Off The LTC1164-7 is a low power, clock-tunable monolithic f up to 20kHz, Single 5V Supply 8th order lowpass filter with linear passband phase and CUTOFF I = 2.5mA (Typ), Single 5V Supply flat group delay. The amplitude response approximates a SUPPLY 75dB THD + Noise with Single 5V Supply maximally flat passband and exhibits steeper roll-off than Phase and Group Delay Response Fully Tested an equivalent 8th order Bessel filter. For instance, at twice Transient Response with No Ringing the cutoff frequency the filter attains 34dB attenuation Wide Dynamic Range (vs12dB for Bessel), while at three times the cutoff fre- No External Components Needed quency the filter attains 68dB attenuation (vs 30dB for Available in 14-Lead N and 16-Lead SW Packages Bessel). The cutoff frequency of the LTC1164-7 is tuned via an external TTL or CMOS clock. U Low power is achieved without sacrificing dynamic range. APPLICATIO S With single 5V supply, the S/N + THD is up to 75dB. Data Communication Filters Optimum 91dB S/N is obtained with 7.5V supplies. Time Delay Networks The clock-to-cutoff frequency ratio of the LTC1164-7 can Phase Matched Filters + be set to 50:1 (Pin 10 to V ) or 100:1 (Pin 10 to V ). , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. When the filter operates at the clock-to-cutoff frequency ratio of 50:1, the input is double-sampled to lower the risk of aliasing. The LTC1164-7 is pin-compatible with the LTC1064-X series and LTC1264-7. TYPICAL APPLICATIO Frequency Response 10kHz Linear Phase Lowpass Filter 1 14 GAIN 150 0 2 13 V IN 140 10 3 12 5V 130 20 4 11 5V LTC1164-7 CLK = 500kHz DELAY 120 30 5 10 5V 40 110 6 9 V OUT 50 100 7 8 90 60 80 70 NOTE: THE POWER SUPPLIES SHOULD BE BYPASSED 70 BY A 0.1F CAPACITOR CLOSE TO THE PACKAGE 80 AND ANY PRINTED CIRCUIT BOARD ASSEMBLY SHOULD MAINTAIN A DISTANCE OF AT LEAST 0.2 1 10 100 INCHES BETWEEN ANY OUTPUT OR INPUT PIN AND FREQUENCY (kHz) THE f LINE. CLK 1164-7 TA01 1164-7 TA02 11647fb 1 GAIN (dB) U ULTC1164-7 AB OLUEXAI U RAT GS S T I (Note 1) + Operating Temperature Range Total Supply Voltage (V to V ) ............................. 16V LTC1164-7C ...................................... 40C to 85C Power Dissipation............................................. 400mW LTC1164-7M ................................... 55C to 125C Burn-In Voltage ...................................................... 16V + 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 NC 1 14 CONNECT 2 NUMBER NUMBER NC 1 16 CONNECT 2 2 13 NC V IN V 2 15 NC 3 12 V IN GND LTC1164-7CN + GND 3 14 V 4 f V 11 CLK LTC1164-7CSW + V 4 13 NC GND 5 10 50/100 GND 5 12 f LP6 6 9 V CLK OUT NC 6 11 50/100 7 8 NC CONNECT 1 LP6 7 10 NC N PACKAGE 14-LEAD PLASTIC DIP CONNECT 1 8 9 V OUT J PACKAGE 14-LEAD CERAMIC DIP T = 150C, = 65C/W (J) JMAX JA SW PACKAGE T = 150C, = 65C/W (J) JMAX JA LTC1164-7CJ T = 110C, = 65C/W (N) JMAX JA 16-LEAD PLASTIC SO (WIDE) T = 110C, = 85C/W OBSOLETE PACKAGE JMAX JA LTC1164-7MJ 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: