LTC1264-7CN#PBF

Overview

The LTC1264-7CN#PBF is a clock-tunable monolithic 8th order lowpass filter featuring linear passband phase and flat group delay. It provides a maximally flat amplitude response with steeper roll-off than equivalent Bessel filters, achieving 28dB attenuation at twice the cutoff frequency. The cutoff frequency is tuned via an external TTL or CMOS clock, supporting ratios of 25:1 or 50:1 to minimize aliasing risks. Operating within a supply range of ±2.375V to ±8V, it delivers up to 65dB THD performance throughout a 100kHz passband. The component is housed in a 14-pin plastic DIP package.

Feature Summary

• Provides linear phase and flat group delay characteristics suitable for precise signal timing applications.
• Achieves steeper roll-off compared to standard 8th order Bessel filters without requiring external components.
• Features clock-tunable operation allowing flexible cutoff frequency adjustment via external digital signals.

Applications

• Data communication filters
• Time delay networks
• Phase matched filters

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free compliance when sourcing this component. Confirm that the CN suffix corresponds to the 14-lead plastic DIP package variant required for your board layout. Ensure the supplier provides valid documentation confirming the active status of this part number before finalizing procurement orders.

Selection Notes

Select this component when linear phase response and flat group delay are critical requirements. Verify that the application can accommodate the necessary external clock source, as the device requires a TTL or CMOS clock input to function. Ensure the power supply configuration supports the required voltage range and that PCB layout guidelines regarding analog ground separation are strictly followed.

Part Context

This component belongs to the LTC1264 series of linear phase lowpass filters. It shares pin compatibility with the LTC1064-X series and other variants within the family. The device represents a specialized solution for applications demanding high-speed filtering with minimal phase distortion, distinguishing it from general-purpose active filters.

Replacement Considerations

The LTC1264-7 is pin-compatible with the LTC1064-X series. Designers should verify electrical specifications match exactly when substituting these parts. No other direct substitutes are confirmed in the provided documentation.