LTC1064-3 Low Noise, High Frequency, 8th Order Linear Phase Lowpass Filter FEATURES DESCRIPTIO 8th Order Filter in a 14-Pin Package The LTC 1064-3 is a monolithic 8th order lowpass Bessel 95kHz Maximum Corner Frequency filter, which provides a linear phase response over its No External Components entire passband. An external TTL or CMOS clock pro- 75:1, 150:1 and 120:1 Clock to Cutoff Frequency grams the filters cutoff frequency. The clock to cutoff + Ratio frequency ratio is 75:1 (Pin 10 at V ) or 150:1 (Pin 10 at 60V Total Wideband Noise V ) or 120:1 (Pin 10 at GND). The maximum cutoff RMS 0.03% THD or Better frequency is 95kHz. No external components are needed. Operates from 2.37V to 8V Power Supplies The LTC1064-3 features low wideband noise and low Low Total Output DC Offset harmonic distortion even for input voltages up to 3V . RMS In fact the LTC1064-3 overall performance competes with U equivalent multiple op amp RC active realizations. The APPLICATIO S LTC1064-3 is available in a 14-pin DIP or 16-pin surface Antialiasing Filters mounted SOL package. The LTC1064-3 is fabricated using Smoothing Filters LTCs enhanced analog CMOS Si-gate process. Tracking High Frequency Lowpass Filters The LTC1064-3 is pin compatible with the LTC1064-1, LTC1064-2 and LTC1064-4. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATIO 8th Order Clock Sweepable Lowpass Bessel Filter Measured Frequency Response 0 1 14 NC OUT C 15 2 13 V IN V NC IN LTC1064-3 30 3 12 8V AGND V 45 4 11 0.1F + CLOCK = 7MHz 8V V f CLK 5 10 60 0.1F + AGND 75/150 V 6 9 75 NC V V OUT OUT 7 8 + 90 V = 7.5V, f = 7MHz, PIN 10 TO V , S CLK INV A NC f = 95kHz, GROUP DELAY = 6s 3dB 105 1064 TA01a 10 100 1000 NOTE: THE POWER SUPPLIES SHOULD BE BYPASSED BY A 0.1F FREQUENCY (kHz) OR LARGER CAPACITOR CLOSE TO THE PACKAGE. THE CONNECTI0N 1064-3 TA01b BETWEEN PIN 7 AND PIN 14 SHOULD BE MADE UNDER THE IC PACKAGE. 10643fa 1 V /V (dB) OUT IN U ULTC1064-3 ABSOLUTE AXI U RATI GS (Note 1) + Total Supply Voltage (V to V ) ............................ 16.5V Operating Temperature Range Power Dissipation.............................................. 400mW LTC1064-3M (OBSOLETE) ............... 55C to 125C Storage Temperature Range ................. 65C to 150C LTC1064-3C ....................................... 40C to 85C + Lead Temperature (Soldering, 10 sec).................. 300C Input Voltage ........................... (V +0.3V) to V 0.3V) Burn-In Voltage ....................................................... 15V UUW PACKAGE/ORDER I FOR ATIO TOP VIEW ORDER PART ORDER PART TOP VIEW OUT C NC 1 14 NUMBER NUMBER 1 16 NC OUT C NC V 2 13 IN 2 15 LTC1064-3CN V NC LTC1064-3CSW V AGND 3 12 IN + 3 14 AGND V f V 4 11 CLK + 4 13 V NC 75/150 AGND 5 10 5 12 AGND f V NC 6 9 CLK OUT 6 11 NC 75/150 NC R A 7 8 IN 7 10 NC NC N PACKAGE 8 9 R A V 14-LEAD PDIP IN OUT T = 110C, = 70C/W JMAX JA SW PACKAGE J PACKAGE 16-LEAD PLASTIC (WIDE) SO 14-LEAD CERDIP LTC1064-3MJ T = 150C, = 90C/W JMAX JA LTC1064-3CJ OBSOLETE PACKAGE Consider the N 14 Package for Alternate Source Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25C. V = 7.5V, 75:1, f = 2MHz, R1 = 10k, TTL or CMOS clock input level A S CLK unless otherwise specified. PARAMETER CONDITIONS MIN TYP MAX UNITS Passband Gain Referenced to 0dB, 1Hz to 1kHz 0.5 0.15 dB Gain TempCo 0.0002 dB/C 3dB Frequency 50:1 (f /f = 75) 26.67 kHz CLK 3dB /f = 150) 13.34 kHz 100:1 (f CLK 3dB Gain at 3dB Frequency Referenced to 0dB, f = 26.67/13.34kHz 3.8 2.75 dB IN Stopband Attenuation At 3f 25 29 dB 3dB 56 60 dB Stopband Attenuation At 5f 3dB Stopband Attenuation At 7f 84 dB 3dB Input Frequency Range 100:1 0 <f /2 kHz CLK 50:1 0 <f kHz CLK Output Voltage Swing and V = 2.37V 1.1 V S Operating Input Voltage Range V = 5V 3.1 V S V = 7.5V 5V S Total Harmonic Distortion V = 5V, Input = 1V at 1kHz 0.015 % S RMS V = 7.5V, Input = 3V at 1kHz 0.03 % S RMS Wideband Noise V = 5V, Input = GND 1Hz 1.99MHz 55 V S RMS V = 7.5V, Input = GND 1Hz 1.99MHz 60 V S RMS 10643fa 2 U WWW