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LTC1064-2 Datasheet(PDF) 1 Page - Linear Technology |
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LTC1064-2 Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page LTC1064-2 1 10642fa FEATURES APPLICATIO S DESCRIPTIO TYPICAL APPLICATIO ■ Antialiasing Filters ■ Smoothing Filters ■ Tracking High Frequency Lowpass Filters ■ 8th Order Filter in a 14-Pin Package ■ 140kHz Maximum Corner Frequency ■ No External Components ■ 50:1 and 100:1 Clock to Cutoff Frequency Ratio ■ 80µVRMS Total Wideband Noise ■ 0.03% THD or Better ■ Operates from ±2.37V to ±8V Power Supplies Low Noise, High Frequency, 8th Order Butterworth Lowpass Filter The LTC ®1064-2 is a monolithic 8th order lowpass Butterworth filter, which provides a maximally flat pass- band. The attenuation slope is –48dB/octave and the maximum attenuation is in excess of 80db. An external TTL or CMOS clock programs the filter’s cutoff frequency. The clock to cutoff frequency ratio is 100:1 (Pin 10 at V–) or 50:1 (Pin 10 at V+). The maximum cutoff frequency is 140kHz. No external components are needed. The LTC1064-2 features low wideband noise and low harmonic distortion even for input voltages up to 3VRMS. In fact the LTC1064-2 overall performance competes with equivalent multiple op amp RC active realizations. The LTC1064-2 is available in a 14-pin DIP or 16-pin surface mounted SW package. The LTC1064-2 is fabricated using LTC’s enhanced analog CMOS Si-gate process. The LTC1064-2 is pin compatible with the LTC1064-1. 8th Order Clock Sweepable Lowpass Butterworth Filter Measured Frequency Response FREQUENCY (kHz) 0 0 –15 –30 –45 –60 –75 –90 –105 300 500 1064-2 TA01b 100 200 400 600 700 VS = ±7.5V LTC1064-2 1 2 3 4 5 6 7 14 13 12 11 10 9 8 OUT C NC V– fCLK 50/100 VOUT NC NC VIN AGND V+ AGND NC RIN A 1064 TA01a NOTE: THE POWER SUPPLIES SHOULD BE BYPASSED BY A 0.1µF CAPACITOR CLOSE TO THE PACKAGE. THE NC PINS 1, 6, 8, AND 13 SHOULD BE PREFERABLY GROUNDED. 8V –8V CLOCK = 5MHz , LTC and LT are registered trademarks of Linear Technology Corporation. |
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