LTC1064CSW#PBF

Overview

The LTC1064CSW#PBF is a quad universal switched-capacitor filter building block housed in a 24-lead SOIC-W package. It integrates four independent second-order sections capable of realizing lowpass, highpass, bandpass, and notch functions using external resistors. The device supports cascading up to eight orders for complex filter responses such as Butterworth or Cauer topologies. It operates on dual supplies ranging from ±2.375V to ±8V with a maximum clock frequency of 7MHz. The internal clock-to-center frequency ratio is selectable between 50:1 and 100:1 via Pin 17.

Feature Summary

• Integrates four independent switched-capacitor filter sections within a single monolithic package
• Supports simultaneous availability of 50:1 and 100:1 clock-to-center frequency ratios
• Enables realization of various classical filter approximations including Butterworth, Cauer, Bessel, and Chebyshev
• Features low noise performance and low harmonic distortion suitable for precision signal processing

Applications

• Anti-aliasing filters for data acquisition systems
• Wide frequency range tracking filters
• Spectral analysis equipment front ends
• Loop filters in communication circuits

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free compliance when sourcing this component. Confirm that the SW package designation corresponds to the 24-lead plastic SO Wide form factor required for your PCB layout. Ensure the AC or C temperature grade matches your operational environment specifications before finalizing procurement.

Selection Notes

Select this component when designing multi-section active filters requiring precise center frequency tuning via an external clock source. Consider the available operating modes, specifically Mode 1 for speed or Mode 3 for adjustable Q, based on your circuit requirements. Evaluate the need for external buffering if driving low impedance loads or coaxial cables to maintain signal integrity.

Part Context

This part belongs to the LTC1064 family of analog mixed-signal integrated circuits manufactured by Analog Devices Inc. It serves as a versatile building block for constructing higher-order filters by cascading its internal sections. The device replaces discrete resistor-capacitor-opamp networks, significantly reducing board space and component count while maintaining high performance.

Replacement Considerations

The obsolete J Package (Ceramic DIP) may be replaced by the N Package (Plastic DIP). Consult manufacturer marketing for customized versions with internal thin film resistors for high-volume applications.