LTC1064-2CN#PBF

Overview

The LTC1064-2CN#PBF is a monolithic 8th-order lowpass Butterworth filter manufactured by Analog Devices Inc. It provides a maximally flat passband with an attenuation slope of –48dB/octave and maximum attenuation exceeding 80dB. The cutoff frequency is programmed via an external TTL or CMOS clock, supporting ratios of 50:1 (Pin 10 at V+) or 100:1 (Pin 10 at V–), with a maximum cutoff frequency of 140kHz. It operates from ±2.37V to ±8V power supplies, features 80µVRMS total wideband noise, and requires no external components.

Feature Summary

• Monolithic 8th-order Butterworth lowpass filter providing a maximally flat passband
• Clock-programmable cutoff frequency with 50:1 or 100:1 ratio options
• Low wideband noise and low harmonic distortion without external components

Applications

• Antialiasing filters
• Smoothing filters
• Tracking high frequency lowpass filters

Procurement Notes

Verify the specific package type for the CN suffix, as datasheet documentation indicates the N Package (14-Lead PDIP) is obsolete. Confirm availability through official Analog Devices channels or authorized distributors. Ensure the ordering suffix matches the required lead frame and packaging specifications for your application.

Selection Notes

Select this component when an 8th-order lowpass response is required in a compact form factor. Consider the 50:1 or 100:1 clock-to-cutoff ratio based on available clock frequencies. Verify that the input signal range does not exceed the specified operating limits for the chosen supply voltage.

Part Context

The LTC1064-2 is part of the LTC1064 family of switched-capacitor filters. It is pin-compatible with the LTC1064-1. The device utilizes an enhanced analog CMOS Si-gate process and is designed to compete with multiple op-amp RC active realizations while offering superior performance in a single integrated circuit.

Replacement Considerations

The N Package (14-Lead PDIP) is listed as obsolete; consider the SW Package (16-Lead Plastic SOIC Wide) or consult marketing for alternate sources. The LTC1064-2 is pin-compatible with the LTC1064-1.