The LTC1064-4 is an 8th order, clock sweepable Cauer lowpass switched capacitor filter. An external TTL or CMOS clock programs the value of the filters cutoff frequency. With Pin 10 at V+, the fCLK to fCUTOFF ratio is 50:1; the filter has a Cauer response and with compensation the passband ripple is ±0.1dB. The stopband attenuation is 80dB at 2 × fCUTOFF. Cutoff frequencies up to 100kHz can be achieved. With Pin 10 at V-, the fCLK to f-3dB ratio is 100:1, the filter has a transitional Butterworth-Cauer response with lower noise and lower delay nonlinearity than the Cauer response. The stopband attenuation at 2.5 × f-3dB is 92dB. Cutoff frequencies up to 50kHz can be achieved. The LTC1064-4 features low noise and low harmonic distortion even when input voltages up to 3VRMS are applied. The LTC1064-4 overall performance competes with equivalent multiple op amp active realizations. The LTC1064-4 is pin compatible with the LTC1064-1, LTC1064-2 and LTC1064-3. The LTC1064-4 is manufactured using our enhanced LTCMOSTM silicon gate process. Applications * Antialiasing Filters * Telecom Filters * Sinewave Generators * 8th Order Filter in a 14-Pin Package * 80dB or More Stopband Attenuation at 2 x fCUTOFF * 50:1 fCLK to fCUTOFF Ratio (Cauer) * 100:1 fCLK to f-3dB Ratio (Transitional) * 135µVRMS Total Wideband Noise * 0.03% THD or Better * 100kHz Maximum fCUTOFF Frequency * Operates up to ±8V Power Supplies * Input Frequency Range up to 50 Times the Filter Cutoff Frequency https://elecena.pl/product/248926/low-noise-8th-order-clock-sweepable-cauer-lowpass-filter 2007-03-01 https://elecena.pl/product/248926/low-noise-8th-order-clock-sweepable-cauer-lowpass-filter 2016-04-13 https://elecena.pl/product/248926/low-noise-8th-order-clock-sweepable-cauer-lowpass-filter 2025-01-18