LTC1064-4CSW#PBF

Overview

The LTC1064-4CSW#PBF is an 8th-order, clock-sweepable Cauer lowpass switched-capacitor filter housed in a 16-lead plastic wide SOIC package. It operates with dual supplies up to ±8V and accepts TTL or CMOS clocks up to 5MHz. The device offers two selectable frequency ratios: a 50:1 fCLK to fCUTOFF ratio for Cauer response (up to 100kHz cutoff) and a 100:1 fCLK to f–3dB ratio for transitional response (up to 50kHz cutoff). Key electrical specifications include a total wideband noise of 135µVRMS, total harmonic distortion of 0.03% at 3VRMS input, and stopband attenuation exceeding 80dB at twice the cutoff frequency.

Feature Summary

• Provides high-selectivity 8th-order filtering within a compact surface-mount package
• Features low noise and low harmonic distortion suitable for precision signal processing
• Allows flexible cutoff frequency programming via external clock signals

Applications

• Antialiasing filters for data acquisition systems
• Telecommunications channel selection and filtering
• Sinewave generation circuits

Procurement Notes

Verify that the ordering suffix #PBF confirms lead-free compliance and RoHS adherence. Confirm the SW package designation matches the required 16-lead wide SOIC footprint. Ensure the temperature grade corresponds to the specific application environment requirements.

Selection Notes

Select this component when an 8th-order elliptic response is required without discrete op-amp complexity. Choose the 50:1 ratio mode for higher cutoff frequencies up to 100kHz. Select the 100:1 ratio mode for lower noise and reduced delay nonlinearity at cutoffs up to 50kHz.

Part Context

This part belongs to the LTC1064 family of low-noise, clock-sweepable filters. It shares pin compatibility with the LTC1064-1, LTC1064-2, and LTC1064-3 variants. The CSW suffix specifically denotes the 16-lead plastic wide SOIC package option.

Replacement Considerations

The datasheet lists the LTC1069-1, LTC1069-6, LTC1569-6, and LTC1569-7 as related parts. These alternatives differ in package type, power consumption, and order specifications.