LTC1065ISW#TRPBF

Overview

The LTC1065ISW#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 response for minimal signal distortion
• High DC accuracy with typically 1mV output offset voltage
• Low clock feedthrough and wideband noise characteristics

Applications

• Anti-aliasing filters
• Audio signal processing
• Strain gauge amplifiers
• Digital voltmeters
• Reconstruction filters

Procurement Notes

Verify the specific ordering suffix #TRPBF confirms tape and reel packaging and lead-free compliance. Confirm the ISW variant meets the required industrial temperature range of -40°C to 85°C. Ensure the 16-pin SW package dimensions align with the target PCB footprint. Cross-reference the manufacturer part number with official Analog Devices documentation to validate authenticity and current production status.

Selection Notes

Select this component when a precise Bessel response is required for applications demanding linear phase characteristics. The internal clock simplifies design by reducing external components, though external clocks are supported for synchronization. Verify that the supply voltage range of ±2.375V to ±8V fits the system constraints. Consider cascading multiple units if steeper roll-off performance beyond the standard 5th order specification is necessary.

Part Context

This part belongs to the LTC1065 series of active filters, which are designed for high-precision signal conditioning. The ISW designation indicates the industrial temperature grade (-40°C to 85°C) and the 16-lead SO Wide package. It is pin-compatible with related models like the LTC1063, facilitating design flexibility within the same product family.

Replacement Considerations

The LTC1063 is a pin-compatible alternative offering a Butterworth response instead of Bessel. For higher-order filtering requirements, consider the LTC1064 or LTC1164 series. Verify that any substitute maintains the required clock-tunability and DC accuracy specifications.