LTC1069-1CS8#TRPBF

Overview

The LTC1069-1CS8#TRPBF is an 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 a single 5V supply. Stopband attenuation reaches -20dB at 1.2fCUTOFF, -52dB at 1.4fCUTOFF, and -70dB at 2fCUTOFF. Wideband noise is 110μV RMS, and signal-to-(noise + THD) ratio is ≥70dB with ±5V supplies.

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 specific ordering suffix #TRPBF indicates tape and reel packaging for the CS8 variant. Confirm the temperature grade 'C' corresponds to the 0°C to 70°C operating range. Ensure the component matches the 8-lead plastic SO package description. Cross-reference the manufacturer part number with official Analog Devices documentation to validate authenticity.

Selection Notes

Select this component when an 8th-order elliptic response is required in a compact SO-8 footprint. Choose based on the necessary cutoff frequency relative to the available clock source. Verify that the single 3.3V or 5V supply options meet the system's power constraints. Ensure the input signal range aligns with the specified output voltage swing capabilities.

Part Context

This device belongs to the LTC1069 family of switched-capacitor filters. It shares architectural similarities with the standard LTC1069 but is optimized for single-supply operation down to 3.3V. The CS8 designation identifies the specific 8-lead plastic small outline package configuration used in surface-mount applications.

Replacement Considerations

LTC1069-1CS8#PBF (same function, different packaging format). LTC1069-6 (single supply, very low power, elliptic LPF). LTC1164-6 (low power 8th order elliptic LPF).