LTC1064-2CSW#PBF

Overview

The LTC1064-2CSW#PBF is a monolithic 8th-order lowpass Butterworth filter housed in a 16-pin SW package. It provides a maximally flat passband with an attenuation slope of –48dB/octave and maximum attenuation exceeding 80dB. The cutoff frequency is programmed by an external TTL or CMOS clock, utilizing a 50:1 ratio when Pin 10 is at V+ or a 100:1 ratio when Pin 10 is at V–. The device operates from ±2.37V to ±8V power supplies, achieving a maximum cutoff frequency of 140kHz. Key electrical characteristics include 80µVRMS total wideband noise, 0.03% THD or better distortion, and no requirement for external components.

Feature Summary

• Monolithic 8th-order Butterworth lowpass filter architecture providing maximally flat passband response
• Clock-programmable cutoff frequency selection via 50:1 or 100:1 input clock ratios
• Integrated design eliminating the need for external passive components
• Low harmonic distortion and wideband noise performance suitable for precision signal processing

Applications

• Antialiasing filters for data acquisition systems
• Smoothing filters for sensor signal conditioning
• Tracking high-frequency lowpass filtering applications

Procurement Notes

Verify that the ordering suffix #PBF confirms lead-free compliance and RoHS adherence as per manufacturer specifications. Confirm the CSW suffix corresponds to the 16-lead plastic wide SOIC package type. Ensure the C temperature grade matches the required operating range of –40°C to +85°C. Cross-reference the specific part number against current Analog Devices documentation to validate availability status and any potential obsolescence notices.

Selection Notes

Select this component when an 8th-order response is required without external capacitors or resistors. Choose the 50:1 clock ratio for higher cutoff frequencies relative to the clock speed, or the 100:1 ratio for greater separation between clock and signal frequencies. Ensure the supply voltage supports the required output swing and that the clock source meets the specified logic threshold levels for the chosen supply configuration.

Part Context

This device belongs to the LTC1064 series of clock-sweepable active filters. It is pin-compatible with the LTC1064-1, which offers different filter responses. The series utilizes enhanced analog CMOS Si-gate process technology to integrate complex filter functions into a single compact package, replacing multi-op-amp RC realizations.

Replacement Considerations

The LTC1064-1 is pin-compatible but features a different filter response. For obsolete packages like the J or N variants, consult marketing for alternate sources. No direct public substitute part numbers are confirmed in the provided datasheet.