LTC1164-8CN

Overview

The LTC1164-8CN is an ultraselective, low power 8th order elliptic bandpass filter manufactured by Analog Devices Inc. It features a clock-tunable center frequency defined by the ratio fCLK/100, supporting frequencies up to 5kHz with ±5V supplies and 4kHz with a single 5V supply. The device provides adjustable passband gain via external resistors without increasing wideband noise, which remains at 270μVRMS for a single 5V supply. It offers stopband attenuation greater than 50dB outside the 1% bandwidth. The component operates within a temperature range of 0°C to 70°C and is housed in a 14-lead PDIP package.

Feature Summary

• Ultraselective 8th order elliptic bandpass filtering with stopband attenuation exceeding 50dB
• Clock-tunable center frequency capability allowing precise adjustment relative to the input clock signal
• Adjustable passband gain using external resistors while maintaining constant wideband noise levels

Applications

• Asynchronous narrowband signal detectors
• Low frequency asynchronous demodulators
• Handheld spectrum analyzers
• In-band tone signaling detectors

Procurement Notes

Verify the specific ordering suffix CN corresponds to the 14-lead PDIP package configuration. Confirm that the operating environment stays within the specified 0°C to 70°C commercial temperature range. Ensure the external clock source meets the required TTL or CMOS square wave specifications with appropriate rise and fall times. Check for potential obsolescence status as indicated by manufacturer notices regarding replacement options.

Selection Notes

Select this component when high selectivity is required for narrowband applications. Ensure the design accommodates the necessary external operational amplifier and precision resistors for gain setting. Verify that the available clock frequency allows for the desired center frequency given the fixed 100:1 division ratio. Consider power supply constraints as performance varies between single and dual supply configurations.

Part Context

This part belongs to the LTC1164 family of switched capacitor filters from Linear Technology, now part of Analog Devices. It serves as a specialized solution for precise analog signal processing where digital filtering might introduce latency or complexity. The family includes variants like the LTC1164-6 for different filter characteristics, offering designers flexibility in selecting the appropriate order and response type for their specific signal conditioning needs.

Replacement Considerations

Consult Linear Technology for potential replacement options due to obsolete status.