TLC04IDR

Overview

The TLC04IDR 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 (D) package. The device supports dual-supply operation from ±2.25 V to ±6 V, with a maximum clock frequency of 2 MHz at ±5 V supplies. The cutoff frequency is determined by the external clock frequency, maintaining a ratio of 50:1 with less than ±0.8% error. Electrical characteristics include a typical supply current of 3 mA at ±5 V, a dynamic range of 86 dB, and peak-to-peak clock feedthrough of 7 mV.

Feature Summary

• Provides accurate fourth-order Butterworth low-pass filtering functions in circuit designs
• Features cutoff frequency stability dependent solely on external-clock frequency stability
• Supports self-clocking, TTL-compatible, and CMOS-compatible clock input options

Applications

• Signal processing requiring precise low-pass filtering
• Data acquisition systems utilizing switched-capacitor techniques
• Audio and instrumentation circuits needing stable cutoff frequencies

Procurement Notes

Verify that the specific part number matches the required industrial temperature grade (-40 °C to 85 °C). Confirm the package type is the 8-pin Small Outline Integrated Circuit (SOIC D). Ensure the design accommodates the necessary external clock generation components for the desired cutoff frequency. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select the TLC04IDR when a fixed fourth-order Butterworth response is required without external passive components. Choose this variant over the commercial grade (TLC04CDR) if operation below 0 °C is necessary. Consider the 50:1 clock-to-cutoff ratio limitation compared to the TLC14 series if higher ratios are needed. Verify that the application can provide the required dual or single supply voltages and appropriate clock signals.

Part Context

This component belongs to the TLC04/MF4A-50 family of monolithic switched-capacitor filters. It is designed as a low-cost alternative to discrete RC filter networks. The device is functionally interchangeable with National Semiconductor MF4-50 devices. The 'I' suffix denotes the industrial temperature range, while 'DR' indicates the tape and reel packaging format.

Replacement Considerations

Public confirmed substitute part numbers include TLC04CDR and TLC04ID.