TLC04ID

Overview

The TLC04ID is a monolithic Butterworth fourth-order low-pass switched-capacitor filter manufactured by Texas Instruments. It operates within an industrial temperature range of -40°C to +85°C and utilizes an 8-pin SOIC package. The device provides accurate filtering functions where the cutoff frequency is determined solely by the external clock frequency stability, featuring a clock-to-cutoff ratio of 50:1 with less than ±0.8% error. Recommended operating conditions specify supply voltages between ±2.25 V and ±6 V. Electrical characteristics at ±5 V indicate a typical supply current of 3 mA, a dynamic range of 86 dB, and a maximum clock frequency of 2 MHz.

Feature Summary

• Monolithic Butterworth fourth-order low-pass switched-capacitor filter architecture
• Cutoff frequency stability dependent exclusively on external-clock frequency
• Supports self-clocking or TTL-compatible and CMOS-compatible clock inputs via level shift terminal
• Designed for interchangeable operation with legacy National MF4-50 devices

Applications

• Precision signal conditioning requiring stable analog filtering
• Data acquisition systems utilizing external clock synchronization
• Audio processing circuits requiring specific attenuation profiles

Procurement Notes

Verify the exact ordering suffix against the manufacturer's latest documentation before procurement. Confirm that the specified package variant matches the required PCB footprint and thermal dissipation capabilities. Ensure the component status remains active for long-term production viability. Cross-reference the lead finish specifications to guarantee compatibility with intended soldering processes and environmental compliance standards.

Selection Notes

Select this component when a fixed Butterworth response is required without external passive components. Evaluate the available clock frequencies to ensure they align with the desired cutoff range. Consider the single-supply versus dual-supply configuration requirements based on the application's ground reference needs. Verify that the input signal levels remain within the recommended operating voltage limits.

Part Context

This part belongs to the TLC04/MF4A-50 family of switched-capacitor filters. It serves as a direct replacement for older discrete RC filter designs in space-constrained applications. The device integrates the necessary operational amplifiers and switching capacitors onto a single silicon die, reducing board area and improving consistency compared to discrete implementations.

Replacement Considerations

TLC04CD

FAQ

How is the cutoff frequency determined?

The cutoff frequency is defined by the external clock frequency applied to the CLKIN or CLKR terminals, maintaining a fixed ratio of 50:1.

What are the supported clock input types?

The device supports self-clocking configurations using external resistors and capacitors, as well as TTL-compatible and CMOS-compatible external clock signals.

Can the device operate on a single supply?

Yes, the device can operate on a single supply, provided that the AGND terminal is biased to midsupply and the filter input signal is appropriately AC-coupled or DC-biased.