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

VCO Oscillators VCO SMT w/Buffer amp 3.55 - 3.9 GHz

Active Filters BPF

Active Filters LTC1063 - DC Accurate, Clock-Tunable 5th Order Butterworth Lowpass Filter

Signal Conditioning Doubler 3.2-7.2 OUT

VCO Oscillators VCO w/ Fo/2 & Div/4, 13.6 - 14.9 GHz

VCO Oscillators VCO SMT with Fo/2, 9.05 - 10.15 GHz

Active Filters BPF Tunable 4 - 8 GHz

Signal Conditioning 5-7 GHz Doubler Die

VCO Oscillators VCO SMT w/Buffer amp, 2.6 - 2.8 GHz