LMF100 is a high performance dual switched capacitor filter manufactured by National Semiconductor using LMCMOS™ process. It has a very low offset voltage and high frequency filter function.
The LMF100 is a high‑performance dual switched‑capacitor filter IC offering low offset voltage, wide supply range, and up to 100 kHz operation. It is pin‑compatible with the industry‑standard MF10 and can be configured for various filter functions such as low‑pass, band‑pass, high‑pass, notch, and all‑pass.
The document details absolute maximum and operating ratings, electrical characteristics, logic input specifications, typical performance graphs, pin descriptions, physical dimensions, and usage notes including recommended clock duty cycle, load capacitance limits, and life‑support policy warnings.
| Supply voltage range | 4 V to 15 V |
|---|---|
| Maximum operating frequency | 100 kHz |
| Crosstalk | -60 dB |
| Clock‑to‑center‑frequency ratio accuracy | +0.2 % typical |
The LMF100 is pin‑compatible with the industry standard MF10.
The clock duty cycle should be close to 50 % especially when the clock frequency is above 200 kHz.
Capacitance loading should be kept below 30 pF for signal frequencies above 15 kHz.