LTC1069-6 Single Supply, Very Low Power, Elliptic Lowpass Filter FEATURES DESCRIPTION n 8th Order Elliptic Filter in SO-8 Package The LTC 1069-6 is a monolithic low power, 8th order lowpass n lter optimized for single 3V or single 5V supply operation. Single 3V Operation: Supply Current: 1mA (Typ) The LTC1069-6 typically consumes 1mA under single 3V f : 14kHz (Max) S/N Ratio: 72dB CUTOFF n supply operation and 1.2mA under 5V operation. Single 5V Operation: Supply Current: 1.2mA (Typ) f : 20kHz (Max) S/N Ratio: 79dB CUTOFF The cutoff frequency of the LTC1069-6 is clock tunable and it is n 0.1dB Passband Ripple Up to 0.9f (Typ) CUTOFF equal to the clock frequency divided by 50. The input signal is n 42dB Attenuation at 1.3f CUTOFF sampled twice per clock cycle to lower the risk of aliasing. n 66dB Attenuation at 2.0f CUTOFF The typical passband ripple is 0.1dB up to 0.9f . CUTOFF n 70dB Attenuation at 2.1f CUTOFF The gain at f is 0.7dB. The transition band of the CUTOFF n Wide Dynamic Range, 75dB or More (S/N + THD), LTC1069-6 features progressive attenuation reaching Under Single 5V Operation 42dB at 1.3f and 70dB at 2.1f . The maximum CUTOFF CUTOFF n Wideband Noise: 120V RMS stopband attenuation is 72dB. n Clock-to-f Ratio: 50:1 CUTOFF n The LTC1069-6 can be clock tuned for cutoff frequencies Internal Sample Rate: 100:1 up to 20kHz (single 5V supply) and for cutoff frequencies up to 14kHz (single 3V supply). APPLICATIONS The low power feature of the LTC1069-6 does not penalize n the devices dynamic range. With single 5V supply and Handheld Instruments n an input range of 0.4V to 1.4V , the Signal-to- Telecommunication Filters RMS RMS n (Noise + THD) ratio is 70dB. The wideband noise of the Antialiasing Filters LTC1069-6 is 125V . n Smoothing Filters RMS n Audio Other lter responses with higher speed can be obtained. n Multimedia Please contact LTC Marketing for details. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. The LTC1069-6 is available in an 8-pin SO package. TYPICAL APPLICATION Frequency Response 10 V = 500mV IN RMS 0 Single 3V Supply 10kHz Elliptic Lowpass Filter 10 20 AGND V OUT 3V 30 + 0.47F V V 40 0.1F LTC1069-6 50 NC NC 60 f = 500kHz V CLK CLK IN 70 1069-6 TA01 80 5 10 20 25 15 FREQUENCY (kHz) 1069-6 TA02 10696fa 1 GAIN (dB)LTC1069-6 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION + Total Supply Voltage (V to V ) ................................12V TOP VIEW Operating Temperature Range AGND 1 8 V OUT LTC1069-6C ............................................. 0C to 70C + V 2 7 V LTC1069-6I ..........................................40C to 85C NC 3 6 NC Storage Temperature ..............................65C to 150C V 4 5 CLK IN Lead Temperature (Soldering, 10 sec) .................. 300C S8 PACKAGE 8-LEAD PLASTIC SO T = 125C, = 130C/W JMAX JA ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1069-6CS8 PBF LTC1069-6CS8 TRPBF 10696 8-Lead Plastic SO 0C to 70C LTC1069-6IS8 PBF LTC1069-6IS8 TRPBF 10696I 8-Lead Plastic SO 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: