LTC1069-1CN8#PBF

Overview

The LTC1069-1CN8#PBF is a monolithic 8th order progressive elliptic lowpass filter in an 8-pin PDIP 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 8kHz on a single 5V supply. 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, and the signal-to-(noise + THD) ratio is ≥70dB.

Feature Summary

• Monolithic 8th order progressive elliptic lowpass 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 component matches the Analog Devices Inc. manufacturer designation and the specific model number LTC1069-1CN8#PBF. Confirm the package type is 8-lead plastic DIP (N8) and the operating temperature range is 0°C to 70°C. Ensure the lead finish is lead-free as indicated by the #PBF suffix. Cross-reference the datasheet revision A for accurate electrical characteristics.

Selection Notes

Select this component when an 8th order elliptic response is required in a compact 8-pin package. It is suitable for applications needing clock-tunable cutoff frequencies up to 8kHz with a single 5V supply. Consider the 2.5mA supply current and 110μV RMS noise for power-sensitive designs. Verify that the input clock signal meets TTL or CMOS levels with rise/fall times under 1μs.

Part Context

This part belongs to the LTC1069 family of low-power switched-capacitor filters. The CN8 suffix denotes the commercial temperature grade (0°C to 70°C) and the 8-lead PDIP package. Other variants include the IN8 for industrial temperatures and CS8/SO packages for surface mount applications. The device replaces discrete RC active filter solutions.

Replacement Considerations

LTC1069-1IN8#PBF offers the same functionality with an extended industrial temperature range (-40°C to 85°C). For surface mount requirements, the LTC1069-1CS8#PBF provides identical electrical performance in an 8-lead SO package.