ZXF36L01W24

Overview

The ZXF36L01W24 is a variable Q analog bandpass filter manufactured by Diodes Incorporated, housed in an SO24W package. It integrates a tunable filter section and a mixer block to support frequencies up to 700 kHz. The device operates on a single 5V supply with typical current consumption of 3.4 mA. Key electrical parameters include a usable Q range of 0.5 to 50, a maximum operating frequency of 150 kHz for direct filtering, and a center frequency temperature coefficient of 10 ppm/°C. The mixer enables high-frequency signal processing by down-converting inputs to the filter's passband.

Feature Summary

• Integrates a variable Q bandpass filter and a mixer block within a single IC
• Supports center frequency tuning via external local oscillator signals
• Features low power consumption with a dedicated standby mode
• Allows microprocessor control through flexible waveform input requirements

Applications

• Audio bandpass and notch filtering
• Micro-controlled frequency selection systems
• Adaptive filtering circuits
• Sonar and ultrasonic detection systems
• Precision instrumentation

Procurement Notes

Verify the specific ordering suffix against official distributor catalogs to confirm packaging format. The standard tube variant contains 31 units per container, while the tape and reel option provides 1000 units per 13-inch reel. Confirm that the component matches the original Zetex specification before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring high-Q filtering at frequencies exceeding standard active filter limits. The integrated mixer allows effective filtering of signals above 150 kHz by shifting them to a lower intermediate frequency. Ensure external resistor and capacitor tolerances are managed, as they dominate the center frequency stability.

Part Context

This component originates from Zetex plc, now part of Diodes Incorporated. It was originally distributed under the Zetex brand name before corporate integration. The datasheet identifies it as Issue 3, released in January 2002. It remains a specialized solution for high-performance analog filtering applications.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Designers should verify pin compatibility and electrical specifications if considering alternative manufacturers for similar variable Q filter functions.

FAQ

How does the device handle frequencies above 150 kHz?

Direct filtering is limited to 150 kHz. For higher frequencies, the internal mixer down-converts the input signal using a local oscillator to an intermediate frequency within the filter's operational range.

What determines the Q factor of the filter?

The Q factor is determined by the ratio of two external feedback resistors (Rf and Ri). A proportional but non-linear relationship exists between this ratio and the resulting Q value.

Can the local oscillator signal be a sine wave?

Yes, the local oscillator can be any waveform, including sine or square waves. This flexibility facilitates convenient microprocessor control of the filter's center frequency.