LTC1065CSW#TRPBF

Overview

The LTC1065CSW#TRPBF is a monolithic, clock-tunable, linear phase 5th order Bessel lowpass filter manufactured by Analog Devices Inc. It provides over 12-bit DC accuracy with a typical output DC offset of 1mV and operates from ±2.375V to ±8V power supplies. The device features an internal or external clock input, maintaining a 100:1 clock-to-cutoff frequency ratio. Key electrical specifications include a maximum cutoff frequency of 50kHz, 80µVRMS wideband noise, and 50µVRMS clock feedthrough. It is housed in a 16-lead SO Wide (SW) surface-mount package.

Feature Summary

• Clock-tunable cutoff frequency with internal oscillator or external clock input
• Linear phase 5th order Bessel lowpass response
• High DC accuracy with typically 1mV output offset
• Low clock feedthrough and wideband noise characteristics

Applications

• Audio signal processing
• Strain gauge amplifier conditioning
• Anti-aliasing filters for data acquisition systems
• Digital voltmeter front-end filtering
• Reconstruction filters in DAC outputs

Procurement Notes

Verify the #TR suffix indicates tape and reel packaging rather than tube. Confirm the CSW designation corresponds to the commercial temperature range (0°C to 70°C) and SW package type. Ensure the PBF suffix confirms lead-free compliance per RoHS standards before finalizing procurement orders.

Selection Notes

Select this component when a precise Bessel response is required without external passive components. The clock-tunable nature allows for adjustable cutoff frequencies using simple RC networks. Consider the 100:1 clock-to-cutoff ratio when designing timing circuits. Verify supply voltage compatibility within the ±2.375V to ±8V range for optimal DC offset performance.

Part Context

This part belongs to the LTC1065 family of active filters. It is pin-compatible with the LTC1063, which offers a Butterworth response. The SW package variant facilitates surface-mount assembly. Related parts include the LTC1064 series for higher-order filtering requirements.

Replacement Considerations

LTC1063CSW#TRPBF offers a Butterworth response instead of Bessel. LTC1065ISW#TRPBF provides an extended industrial temperature range (-40°C to 85°C). Verify functional equivalence regarding phase response and DC offset specifications when substituting.