LMF100CIWM/NOPB

Overview

The LMF100CIWM/NOPB is a dual high-performance switched capacitor filter manufactured by Texas Instruments. It operates on a wide supply voltage range of 4 V to 15 V and supports clock frequencies up to 3.5 MHz, enabling center frequencies up to 100 kHz. The device features low offset voltages, typically ±5 mV in 50:1 mode and ±15 mV in 100:1 mode, with crosstalk below -60 dB. It provides a clock-to-center frequency ratio accuracy of ±0.2% typical and an f0 × Q range up to 1.8 MHz. Packaged in a 20-pin SOIC (DW) format, it replaces active RC filters with reduced form factors.

Feature Summary

• Dual independent second-order switched capacitor filter blocks capable of realizing various filtering functions including allpass, highpass, notch, bandpass, and lowpass.
• Pin-compatible with the industry standard MF10 while offering significantly improved performance metrics such as lower offset voltage and higher operating frequency.
• Flexible configuration modes allowing for fourth-order biquadratic function realization within a single package through internal cascading.

Applications

• Replacing traditional active RC filters to achieve reduced form factors and higher accuracy.
• Audio processing systems requiring precise frequency filtering.
• Communication equipment utilizing bandpass or notch filtering functions.
• Instrumentation and telemetry applications needing stable analog signal conditioning.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the presence of the NOPB suffix indicating lead-free and RoHS compliance status. Ensure the specific CIWM variant matches the required industrial temperature range specifications before finalizing procurement orders.

Selection Notes

Select this component when designing circuits that require dual switched capacitor filters with high precision and low offset. Consider the 20-pin SOIC package constraints and verify that the external clock source can provide the necessary duty cycle stability for optimal filter performance at higher frequencies.

Part Context

This part belongs to the LMF100 family of dual switched capacitor filters from Texas Instruments. It serves as a modernized replacement for legacy components like the MF10, offering enhanced electrical characteristics while maintaining pin compatibility for easier design upgrades in existing analog signal processing architectures.

Replacement Considerations

• LMF100CIWM

FAQ

How does the LMF100 differ from the MF10?

The LMF100 is pin-for-pin compatible with the MF10 but offers improved performance, including a wider power supply range, lower offset voltage, and higher operational frequency capabilities.

What is the maximum clock frequency supported?

The device supports clock frequencies up to 3.5 MHz, which allows for center frequencies up to 100 kHz depending on the selected clock-to-center frequency ratio mode.