LTC1069-1CS8#PBF

Overview

The LTC1069-1CS8#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. Passband ripple is typically ±0.15dB. Stopband attenuation reaches -20dB at 1.2fCUTOFF, -52dB at 1.4fCUTOFF, and -70dB at 2fCUTOFF. Wideband noise is 110μV RMS.

Feature Summary

• Monolithic 8th order elliptic filter architecture
• Clock-tunable cutoff frequency capability
• Single 3.3V to ±5V power supply operation
• Low power consumption profile

Applications

• Telecommunication filters
• Antialiasing filters

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free finish and tube packaging. Confirm the CS8 designation corresponds to the commercial temperature range (0°C to 70°C) and SOIC-8 package. Ensure the clock source meets TTL/CMOS thresholds for the selected supply voltage.

Selection Notes

Select this component when an 8th order elliptic response is required in a compact SO-8 footprint. Verify that the application can accommodate the external clock signal generation. Compare against the LTC1069-6 if lower power or different clock ratios are needed. Ensure the input signal levels remain within the specified dynamic range for optimal THD performance.

Part Context

This part belongs to the LTC1069 family of switched-capacitor filters. It shares the core elliptic topology with variants like the LTC1069-1CN8 but differs in package type and temperature grade. The CS8 suffix specifically denotes the plastic small outline package suitable for surface mount applications.

Replacement Considerations

LTC1069-1IS8#PBF offers the same electrical characteristics but supports an extended industrial temperature range (-40°C to 85°C). Other family members like the LTC1069-6 provide alternative clock-to-cutoff ratios.