LTC1069-1 Datasheet | Linear Technology

Features n 8th Order Elliptic Filter in SO-8 Package n Operates from Single 3.3V to ±5V Power Supplies n - 20d B at 1.2f CUTOFF n - 52d B at 1.4f CUTOFF n - 70d B at 2f CUTOFF n Wide Dynamic Range n 110μVRMS Wideband Noise n 3.8m A Supply Current with ±5V Supplies n 2.5m A Supply Current with Single 5V Supply n 2m A Supply Current with Single 3.3V Supply APPLICATIONS n Telemunication Filters n Antialiasing Filters L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Single 3.3V Supply 3k Hz Elliptic Lowpass Filter + 0.47μF 3.3V 0.1μF AGND VOUT V+ V- LTC1069-1 NC NC VIN CLK VOUT f CLK 300k Hz 1069-1 TA01 Low Power, 8th Order Progressive Elliptic, Lowpass Filter DESCRIPTION The LTC®1069-1 is a monolithic 8th order lowpass filter featuring clock-tunable cutoff frequency and 2.5m A power supply current with a single 5V supply. An additional feature of the LTC1069-1 is operation with a single 3.3V supply. The cutoff frequency (f CUTOFF) of the LTC1069-1 is equal to the clock frequency divided by 100. The gain at f CUTOFF is - 0.7d B and the typical passband ripple is ±0.15d B up to 0.9f CUTOFF. The stopband attenuation of the LTC1069-1 Features a progressive elliptic response reaching 20d B attenuation at 1.2f CUTOFF, 52d B attenuation at 1.4f CUTOFF and 70d B attenuation at 2f CUTOFF. With ±5V supplies, the LTC1069-1 cutoff frequency can be clock-tuned up to 12k Hz; with a single 5V supply, the maximum cutoff frequency is 8k Hz. The low power feature of the LTC1069-1 does not penalize the device’s dynamic range. With ±5V supplies and an input range of 0.3VRMS to 2.5VRMS, the signal-to-(noise + THD) ratio is ≥70d B. The wideband noise of the LTC1069-1 is 110μVRMS. Other filter responses with lower power or higher speed can be obtained. Please contact LTC marketing for details. The LTC1069-1 is available in 8-pin PDIP and 8-pin SO packages. GAIN (d B) 10 0 - 10 - 20 -...