LTC1059CS#PBF

Overview

The LTC1059CS#PBF is a high-performance switched capacitor universal filter manufactured by Analog Devices Inc. It integrates a general-purpose active filter building block and an uncommitted operational amplifier within a 14-lead plastic SO package (S Package). The device supports center frequency tuning from 0.1Hz to 40kHz, dependent on an external clock or resistor ratio. It operates with dual supplies ranging from ±2.37V to ±8V or single supplies from 4.74V to 16V. Key electrical characteristics include a guaranteed clock-to-center frequency accuracy of 0.8%, low DC offset voltages, and power supply currents between 3.5mA and 7mA at ±5V. The component handles input frequencies up to 200kHz.

Feature Summary

• Provides versatile second-order filter functions including bandpass, notch, highpass, and allpass configurations via dedicated output pins.
• Integrates an uncommitted operational amplifier for gain adjustment, cascading techniques, or additional signal processing stages.
• Features T2L or CMOS compatible clock inputs to facilitate integration with various digital control systems.
• Ensures consistent performance across temperature ranges with guaranteed accuracy for center frequency and Q factor.

Applications

• Sinewave oscillator circuits
• Sweepable bandpass and notch filters
• Full audio frequency filtering applications
• Tracking filter implementations

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing replacements. Confirm the S package designation matches the required surface mount footprint. Ensure the C grade operating temperature range meets system requirements. Check current availability status as older components may have limited stock. Validate pin compatibility if substituting with similar family members.

Selection Notes

Select this component for designs requiring precise analog filtering without external discrete capacitors. Consider the wide center frequency range suitable for both low-frequency and audio applications. Evaluate the power supply flexibility for battery-operated or standard voltage systems. Assess the need for the integrated op amp to reduce bill of materials. Verify clock source compatibility with the T2L or CMOS input specifications.

Part Context

This part belongs to the LTC1059 series of switched capacitor filters. It is functionally equivalent to the LTC1060 but typically offers faster operation under single supply conditions. The device utilizes Linear Technology's enhanced LTCMOS silicon gate process. It serves as a building block for higher-order filter realizations such as Butterworth or Bessel responses when cascaded with other units in the family.

Replacement Considerations

The LTC1060 is a compatible alternative with identical pinout functionality. The LTC1061 provides triple universal filtering capabilities. Consult manufacturer documentation for detailed mode definitions and timing parameters when switching between these variants.