Features • Low Cost • Easy to use • 8-pin mini-DIP or 14-pin wide-body S.O. • No external components • 5V to 14V supply voltage • Cutoff frequency range of 0.1 Hz to 20 kHz • Cutoff frequency accuracy of ± 0.3% typical • Cutoff frequency set by external clock • Separate TTL and CMOS/Schmitt-trigger clock inputs Description The MF4 is a versatile, easy to use, precision 4th order Butterworth low-pass filter. Switched-capacitor techniques eliminate external component requirements and allow a clock-tunable cutoff frequency. The ratio of the clock frequency to the low-pass cutoff frequency is internally set to 50 to 1. A Schmitt trigger clock input stage allows two clocking options, either self-clocking (via an external resistor and capacitor) for stand-alone applications, or for tighter cutoff frequency control an external TTL or CMOS logic compatible clock can be applied. The maximally flat passband frequency response together with a DC gain of 1 V/V allows cascading MF4 sections together for higher order filtering.

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Datasheet

Title		Size	Date	Other Language
	MF4 4th Order Switched Capacitor Butterworth Lowpass Filter	466 Kbytes	12-Jul-99	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-779: A Basic Introduction to Filters - Active, Passive and Switched-Capacitor	399 Kbytes	5-Aug-95	日本語

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Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
MF4CN-100	NONE	NONE	08 Sep 1998
MF4CN-50	NONE	NONE	04 Sep 2001
MF4CWM-100	NONE	NONE	07 Dec 1999
MF4CWM-50	NONE	NONE	07 Dec 1999
MF4CWMX-100	NONE	NONE	07 Dec 1999
MF4CWMX-50	NONE	NONE	07 Dec 1999