LTC1264CSW#PBF

Overview

The LTC1264CSW#PBF is a high-speed, quad universal filter building block from Analog Devices Inc. It integrates four identical second-order switched-capacitor filters within a single 24-lead SO Wide package. The device supports center frequencies up to 250 kHz with a standard clock-to-center frequency ratio of 20:1. It operates on dual supplies ranging from ±2.375 V to ±8 V or a single 5 V supply. Key electrical characteristics include a gain-bandwidth product of 7 MHz, a slew rate of 10 V/µs, and power supply current of 9 mA to 26 mA depending on voltage. The component provides low noise performance and improved aliasing rejection through double-sampling techniques.

Feature Summary

• Integrates four identical second-order switched-capacitor filter sections for versatile signal processing
• Features double-sampling architecture to significantly improve aliasing performance
• Supports multiple operational modes including Mode 1, Mode 1b, Mode 2, and Mode 3 for various filter topologies
• Provides low harmonic distortion and low noise characteristics suitable for precision applications

Applications

• Digital communications systems requiring tunable filtering
• Spread spectrum communications equipment
• Spectral analysis instrumentation
• Loran receivers
• General purpose industrial instrumentation

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing this component. Confirm that the SW package designation matches the required surface-mount footprint for your PCB layout. Ensure the supplier documentation explicitly references the Analog Devices datasheet 1264fb for accurate pinout and electrical specifications prior to final procurement.

Selection Notes

Select the LTC1264CSW#PBF when a compact solution for multiple filter stages is required without discrete components. Consider the 20:1 clock ratio limitation if higher ratios are needed, as Mode 1b allows modification via external resistors. Evaluate the maximum operating frequency constraints based on the chosen Q factor and supply voltage to ensure stability within the specified temperature range.

Part Context

This component belongs to the LTC1264 family of switched-capacitor filters. The CSW suffix specifically denotes the 24-lead Plastic Small Outline (Wide) package variant. Other variants in the series include the CN part number which utilizes a 24-lead PDIP package. The device is designed to replace complex discrete active filter designs by integrating multiple filter blocks into a single monolithic IC.

Replacement Considerations

The LTC1064 is a related component offering similar switching capabilities but may differ in package options and specific electrical parameters. Verify compatibility regarding pinout and operating voltage ranges before substitution.