LTC1064-4MJ

Overview

The LTC1064-4MJ is an obsolete 8th-order, clock-sweepable Cauer lowpass switched-capacitor filter housed in a 14-lead CERDIP package. It operates with dual supplies up to ±8V and achieves cutoff frequencies up to 100kHz via an external TTL or CMOS clock. The device provides a 50:1 fCLK to fCUTOFF ratio for Cauer response (±0.1dB ripple, 80dB stopband attenuation at 2×fCUTOFF) or a 100:1 ratio for transitional Butterworth-Cauer response. Key electrical specifications include 135µVRMS wideband noise, 0.03% THD at 3VRMS input, and operation within a -55°C to 125°C temperature range.

Feature Summary

• Provides high-selectivity 8th-order filtering in a compact 14-pin hermetic package
• Features low harmonic distortion and wideband noise performance competitive with discrete op-amp designs
• Offers selectable frequency response characteristics through simple pin configuration

Applications

• Antialiasing filters for data acquisition systems
• Telecommunications signal processing
• Sinewave generation circuits

Procurement Notes

Verify the obsolete status of the LTC1064-4MJ before initiating procurement. Confirm availability through alternate sources as indicated in the datasheet. Ensure that the 14-lead CERDIP package dimensions align with existing board layouts. Validate that the operating temperature range meets system requirements.

Selection Notes

Select this component when a high-order elliptic response is required in a hermetic package. Compare against the N14 PDIP package if leaded plastic is preferred. Consider the SW package variant for surface-mount applications. Evaluate compensation requirements for cutoff frequencies above 20kHz to maintain passband ripple specifications.

Part Context

The LTC1064-4MJ belongs to the LTC1064 family of active filters. It shares pin compatibility with the LTC1064-1, LTC1064-2, and LTC1064-3 variants. These devices utilize Linear Technology's enhanced LTCMOS silicon gate process. The MJ suffix specifically denotes the military-grade temperature range and ceramic DIP packaging.

Replacement Considerations

Datasheet recommends considering the N14 package for an alternate source. No direct functional substitutes are listed; evaluate discrete op-amp RC designs or other LTC1064 series members for equivalent performance.