LTC1069-1 Low Power, 8th Order Progressive Elliptic, Lowpass Filter FEATURES DESCRIPTION n 8th Order Elliptic Filter in SO-8 Package The LTC 1069-1 is a monolithic 8th order lowpass lter n Operates from Single 3.3V to 5V Power Supplies featuring clock-tunable cutoff frequency and 2.5mA power n 20dB at 1.2f supply current with a single 5V supply. An additional feature CUTOFF n 52dB at 1.4f of the LTC1069-1 is operation with a single 3.3V supply. CUTOFF n 70dB at 2f CUTOFF The cutoff frequency (f ) of the LTC1069-1 is equal CUTOFF n Wide Dynamic Range to the clock frequency divided by 100. The gain at f CUTOFF n 110V Wideband Noise RMS is 0.7dB and the typical passband ripple is 0.15dB up n 3.8mA Supply Current with 5V Supplies to 0.9f . The stopband attenuation of the LTC1069-1 CUTOFF n 2.5mA Supply Current with Single 5V Supply features a progressive elliptic response reaching 20dB n 2mA Supply Current with Single 3.3V Supply attenuation at 1.2f , 52dB attenuation at 1.4f CUTOFF CUTOFF and 70dB attenuation at 2f . CUTOFF APPLICATIONS With 5V supplies, the LTC1069-1 cutoff frequency can n Telecommunication Filters be clock-tuned up to 12kHz with a single 5V supply, the n Antialiasing Filters maximum cutoff frequency is 8kHz. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other The low power feature of the LTC1069-1 does not penal- trademarks are the property of their respective owners. ize the devices dynamic range. With 5V supplies and an input range of 0.3V to 2.5V , the signal-to-(noise + RMS RMS THD) ratio is 70dB. The wideband noise of the LTC1069-1 is 110V . Other lter responses with lower power or RMS higher speed can be obtained. Please contact LTC market- ing for details. The LTC1069-1 is available in 8-pin PDIP and 8-pin SO packages. TYPICAL APPLICATION Frequency Response 10 Single 3.3V Supply 3kHz Elliptic Lowpass Filter 0 10 + AGND V V OUT OUT 20 0.47F + 3.3V V V 30 LTC1069-1 0.1F NC NC 40 f CLK 50 V V CLK IN IN 300kHz 1069-1 TA01 60 70 80 1.5 3 4.5 6 7.5 FREQUENCY (kHz) 10691 TA02 10691fa 1 GAIN (dB)LTC1069-1 ABSOLUTE MAXIMUM RATINGS (Note 1) + Total Supply Voltage (V to V ) .................................12V Operating Temperature Range Maximum Voltage at LTC1069C-1 ............................................. 0C to 70C Any Pin .............................(V 0.3V) V (V+ + 0.3V) LTC1069I-1 ..........................................40C to 85C Storage Temperature Range ...................65C to 150C Lead Temperature (Soldering, 10 sec) .................. 300C PIN CONFIGURATION TOP VIEW TOP VIEW AGND 1 V AGND 1 8 V 8 OUT OUT + + V 2 7 V V 2 7 V NC NC 3 6 NC 3 6 NC V 4 5 CLK V 4 5 CLK IN IN N8 PACKAGE S8 PACKAGE 8-LEAD PLASTIC DIP 8-LEAD PLASTIC SO T = 110C, = 100C/W T = 125C, = 130C/W JMAX JA JMAX JA ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LTC1069-1CN8 PBF LTC1069-1 8-Lead Plastic DIP 0C to 70C LTC1069-1IN8 PBF LTC1069-1 8-Lead Plastic DIP 40C to 85C LTC1069-1CS8 PBF LTC1069-1CS8 TRPBF 10691 8-Lead Plastic SO 0C to 70C LTC1069-1IS8 PBF LTC1069-1IS8 TRPBF 10691I 8-Lead Plastic SO 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. *The temperature grade is identi ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: