Features and Benefits
- 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
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.
- Antialiasing Filters
- Telecom Filters
- Sinewave Generators
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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