LTC1061CSW#TRPBF

Overview

The LTC1061CSW#TRPBF is a high-performance triple universal filter building block manufactured by Analog Devices Inc. It integrates three independent switched-capacitor filter sections within a single 20-lead SO Wide package. The device supports center frequency tuning via an external clock signal, enabling the realization of various second-order functions including lowpass, bandpass, highpass, notch, and allpass responses. It operates from a single 4.7V supply or dual supplies ranging from –2.37V to –8V. Key electrical specifications include a maximum center frequency range up to 35kHz, a guaranteed fO × Q product up to 1MHz, and a typical signal-to-noise ratio of 90dB. The component features CMOS-compatible clock inputs and ensures low offset voltages over temperature.

Feature Summary

• Integrates three independent universal filter building blocks capable of producing multiple second-order filter functions simultaneously.
• Supports clock-tunable center frequencies with internal ratios of 50:1 or 100:1, allowing for precise frequency adjustment using external resistors.
• Operates flexibly with single positive or dual negative power supplies, accommodating a wide voltage range for diverse system requirements.
• Features CMOS-compatible clock inputs and includes a sample-and-hold mode for maintaining output states when filtering is paused.

Applications

• Construction of higher-order filters by cascading multiple sections for applications such as 6th order Chebyshev or Butterworth implementations.
• Tracking filters where the center frequency must dynamically follow an input signal or reference clock.
• Antialiasing filters in data acquisition systems requiring precise cutoff frequencies and low noise performance.
• Bandpass and notch filter designs for signal conditioning and interference rejection in communication circuits.

Procurement Notes

Verify that the ordering suffix #TRPBF corresponds to the tape and reel packaging format required for automated assembly processes. Confirm that the specific grade (C) meets the operating temperature range requirements for your application environment. Ensure compatibility with the 20-lead SO Wide footprint during PCB layout verification.

Selection Notes

Select this component when a design requires multiple filter stages within a compact form factor without consuming separate IC footprints. Consider the maximum clock frequency limitations relative to the desired center frequency and Q factor. Evaluate the power supply constraints to ensure operation within the specified voltage range while meeting noise and offset specifications.

Part Context

This part belongs to the LTC1061 family of universal filter building blocks, which also includes dual versions like the LTC1060 and single versions like the LTC1059. The SW suffix indicates the 20-lead plastic SO Wide package variant, distinct from the DIP package options. The #TRPBF designation signifies lead-free construction supplied in tape and reel format.

Replacement Considerations

Consider the LTC1061CSW for direct pin-compatible replacement if the existing design uses the standard SO Wide package version. Verify that any substitute maintains the same triple-filter architecture and clock interface compatibility to avoid schematic modifications.