LTC1064-4 Datasheet | Linear Technology

Low Noise, 8th Order, Clock Sweepable Cauer Lowpass Filter Features - 8th Order Filter in a 14-Pin Package - 80d B or More Stopband Attenuation at 2 × f CUTOFF - 50:1, f CLK to f CUTOFF Ratio (Cauer) 100:1, f CLK to f- 3d B Ratio (Transitional) - 135µVRMS Total Wideband Noise - 0.03% THD or Better - 100k Hz Maximum f CUTOFF Frequency - Operates up to ±8V Power Supplies - Input Frequency Range up to 50 Times the Filter Cutoff Frequency U APPLICATIO S - Antialiasing Filters - Tele Filters - Sinewave Generators , LTC and LT are registered trademarks of Linear Technology Corporation. LTCMOS is a trademark of Linear Technology Corporation. DESCRIPTIO The LTC®1064-4 is an 8th order, clock sweepable Cauer lowpass switched capacitor filter. An external TTL or CMOS clock programs the value of the filter’s cutoff frequency. With Pin 10 at V+, the f CLK to f CUTOFF ratio is 50:1; the filter has a Cauer response and with pensation the passband ripple is ±0.1d B. The stopband attenuation is 80d B at 2 × f CUTOFF. Cutoff frequencies up to 100k Hz can be achieved. With Pin 10 at V- , the f CLK to f- 3d B 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- 3d B is 92d B. Cutoff frequencies up to 50k Hz 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 petes with equivalent multiple op amp active realizations. The LTC1064-4 is pin patible with the LTC1064-1, LTC1064-2 and LTC1064-3. The LTC1064-4 is manufactured using Linear Technology’s enhanced LTCMOSTM silicon gate process. TYPICAL APPLICATIO 8th Order Clock Sweepable Lowpass Elliptic Filter 8V 0.1µF 1 14 INV C R(h, I) 2 VIN P2- 13 3 AGND V- 12 LTC1064-4 V+ f...