TH7301EDF

Overview

The TH7301EDF is a dual-channel programmable low-pass filter manufactured by Melexis Technologies NV, housed in a 16-pin SOP package. It incorporates two matching 4th-order Butterworth filters with voltage gain control for quadrature demodulated signals. The cutoff frequency is programmable between 0.8 MHz and 22.4 MHz via a 10-bit control word using an on-chip oscillator. Inband voltage gain ranges from -3 dB to 20.5 dB in 0.5 dB steps. The device operates from a single negative supply of -5 V (typical), drawing approximately 55 mA at 25°C. It supports AC-coupled single-ended or differential inputs and requires no external trimming components.

Feature Summary

• Dual-channel architecture providing superior matching for I/Q signal paths
• Companding design ensures high resolution at lower cutoff frequencies
• Integrated on-chip oscillator allows accurate cutoff frequency tracking
• Supports both single-ended and differential input operations

Applications

• Digital Broadcasting Systems (DBS)
• Digital Video Broadcasting (DVB)
• Satellite and cable TV decoders
• Microwave point-to-point links

Procurement Notes

Verify the specific suffix 'EDF' against official Melexis documentation to confirm exact temperature range and packaging specifications. Standard commercial variants are designated as TH7301C. Ensure the power supply configuration strictly follows the recommended single negative supply topology to prevent device damage.

Selection Notes

Select this component when precise quadrature filtering is required for broadcast systems. The internal oscillator simplifies calibration compared to external RC networks. Verify that the system can accommodate the required -5V supply rail and that the serial interface timing meets the setup and hold requirements for reliable register programming.

Part Context

This device belongs to the TH7301 family of dual-channel programmable low-pass filters. It is designed specifically for applications requiring matched I/Q channel performance without external passive components for frequency setting. The architecture utilizes fully balanced continuous-time gyrator techniques to minimize noise and DC offsets.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Melexis technical support for direct replacements or evaluate alternative integrated filter solutions if sourcing constraints exist.