LTC1164-5 Low Power 8th Order Pin Selectable Butterworth or Bessel Lowpass Filter FEATURES DESCRIPTIO Pin Selectable Butterworth or Bessel Response The LTC 1164-5 is a monolithic 8th order filter it approxi- 4mA Supply Current with 5V Supplies mates either a Butterworth or a Bessel lowpass response. f up to 20kHz The LTC1164-5 features clock-tunable cutoff frequency CUTOFF 100V Wideband Noise and low power consumption (4.5mA with 5V supplies RMS THD < 0.02% (50:1, V = 7.5V, V = 2V ) and 2.5mA with single 5V supply). S IN RMS Operates with a Single 5V Supply (1V Input RMS Low power operation is achieved without compromising Range) noise or distortion performance. With 5V supplies and 60V Clock Feedthrough (Single 5V Supply) RMS 10kHz cutoff frequency, the operating signal-to-noise Operates up to 8V Supplies ratio is 86dB and the THD throughout the passband is TTL/CMOS-Compatible Clock Input 0.015%. Under the same conditions, a 77dB signal-to- No External Components noise ratio and distortion is obtained with a single 5V Available in 14-Pin DIP and 16-Pin SO Wide supply while the clock feedthrough is kept below the noise Packages level. The maximum signal-to-noise ratio is 92dB. U The LTC1164-5 approximates an 8th order Butterworth APPLICATIO S response with a clock-to-cutoff frequency ratio of 100:1 + (Pin 10 to V ) or 50:1 double-sampled (Pin 10 to V and Anti-Aliasing Filters Pin 1 shorted to Pin 13). Double-sampling allows the input Battery-Operated Instruments signal frequency to reach the clock frequency before any Telecommunications Filters aliasing occurrence. An 8th order Bessel response can Smoothing Filters also be approximated with a clock-to-cutoff frequency , LTC and LT are registered trademarks of Linear Technology Corporation. ratio of 140:1 (Pin 10 to ground). With 7.5V supply, 5V All other trademarks are the property of their respective owners. supply and single 5V supply, the maximum clock fre- quency of the LTC1164-5 is 1.5MHz, 1MHz and 1MHz respectively. The LTC1164-5 is pin-compatible with the LTC1064-2 and LTC-1064-3. TYPICAL APPLICATIO Frequency Response Butterworth 20kHz Anti-Aliasing Filter 0 10 1 14 20 2 13 V IN 30 3 12 8V WIDEBAND NOISE = 110V RMS 40 THD IN PASSBAND < 0.02% AT V = 2V 4 11 IN RMS LTC1164-5 CLK = 1MHz 8V 50 NOTE: THE CONNECTION FROM PIN 7 TO PIN 14 5 10 + TO V SHOULD BE MADE UNDER THE PACKAGE. 60 FOR 50:1 OPERATION CONNECT PIN 1 TO PIN 13 6 9 NC V OUT 70 AS SHOWN. FOR 100:1 OR 150:1 OPERATION PINS 1 7 8 AND 13 SHOULD FLOAT. THE POWER SUPPLIES 80 SHOULD BE BYPASSED BY A 0.1F CAPACITOR AS 1164-5 TA01 CLOSE TO THE PACKAGE AS POSSIBLE. 1 10 100 FREQUENCY (kHz) 1164-5 TA02 11645fc 1 GAIN (dB) U ULTC1164-5 ABSOLUTE AXI U RATI GS (Note 1) + Total Supply Voltage (V to V ) ............................. 16V Operating Temperature Range + Input Voltage (Note 2) ......... (V + 0.3V) to (V 0.3V) LTC1164-5C ...................................... 40C to 85C Output Short-Circuit Duration ......................... Indefinite LTC1164-5M (OBSOLETE) ............... 55C to 125C Power Dissipation............................................. 400mW Storage Temperature Range ................ 65C to 150C Burn-In Voltage ...................................................... 16V Lead Temperature (Soldering, 10 sec)................. 300C UUW PACKAGE/ORDER I FOR ATIO TOP VIEW TOP VIEW ORDER PART ORDER PART 1 14 CONNECT 2 50:1 MODE 1 16 CONNECT 2 50:1 MODE NUMBER NUMBER 2 13 50:1 MODE V 2 15 50:1 MODE V IN IN LTC1164-5CN LTC1164-5CSW 3 V GND 3 14 V GND 12 + + V 4 13 NC V 4 11 CLK GND 5 12 CLK GND 5 10 BUTT/BESS NC 6 11 BUTT/BESS 6 9 V LP6 OUT LP6 7 10 NC 7 8 NC CONNECT 1 CONNECT 1 8 9 V OUT N PACKAGE 14-LEAD PDIP SW PACKAGE T = 110C, = 65C/W JMAX JA 16-LEAD PLASTIC SO WIDE T = 110C, = 85C/W JMAX JA LTC1164-5CJ J PACKAGE 14-LEAD CERDIP T = 110C, = 65C/W JMAX JA LTC1164-5MJ 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: