LTC1069-1IS8#PBF

Overview

The LTC1069-1IS8#PBF is a monolithic 8th order progressive elliptic lowpass filter in an 8-lead SO package. It operates from single 3.3V to ±5V supplies with supply currents of 2mA, 2.5mA, and 3.8mA respectively. The cutoff frequency equals the clock frequency divided by 100, reaching up to 12kHz with ±5V or 8kHz with single 5V. Stopband attenuation reaches -20dB at 1.2fCUTOFF, -52dB at 1.4fCUTOFF, and -70dB at 2fCUTOFF. Wideband noise is 110μV RMS, and it supports TTL/CMOS clocks.

Feature Summary

• Monolithic 8th order elliptic filter architecture
• Clock-tunable cutoff frequency capability
• Low power consumption across various supply voltages
• Wide dynamic range with low wideband noise

Applications

• Telecommunication filters
• Antialiasing filters

Procurement Notes

Verify the IS8 suffix indicates industrial temperature range (-40°C to 85°C) and SOIC-8 packaging. Confirm lead-free finish compliance via PBF designation. Check datasheet for specific ordering suffixes regarding tape and reel availability versus tube quantities.

Selection Notes

Select based on required cutoff frequency relative to available clock source. Ensure supply voltage matches desired current consumption profile. Verify input signal levels do not exceed output swing limits. Consider layout requirements for analog ground separation to minimize clock feedthrough effects.

Part Context

Part of the LTC1069 family offering elliptic response characteristics. Available in PDIP and SO packages with varying temperature grades. Related parts include LTC1069-6 for single supply applications and LTC1164 series for Butterworth or linear phase responses.

Replacement Considerations

LTC1069-1CS8#PBF offers identical electrical performance but is rated for commercial temperature range (0°C to 70°C). Verify thermal requirements before substitution.