LMF100 Datasheet | National Semiconductor

Description The LMF100 consists of two independent general purpose high performance switched capacitor filters. With an external clock and 2 to 4 resistors, various second-order and first-order filtering functions can be realized by each filter block. Each block has 3 outputs. One output can be configured to perform either an allpass, highpass, or notch function. The other two outputs perform bandpass and lowpass functions. The center frequency of each filter stage is tuned by using an external clock or a bination of a clock and resistor ratio. Up to a 4th-order biquadratic function can be realized with a single LMF100. Higher order filters are implemented by simply cascading additional packages, and all the classical filters (such as Butterworth, Bessel, Elliptic, and Chebyshev) can be realized. The LMF100 is fabricated on National Semiconductor’s high performance analog silicon gate CMOS process, LMCMOS™. This allows for the production of a very low offset, high frequency filter building block. The LMF100 is pin-patible with the industry standard MF10, but provides greatly improved performance. Features n Wide 4V to 15V power supply range n Operation up to 100 k Hz n Low offset voltage: typically (50:1 or 100:1 mode): Vos1 = ± 5 m V Vos2 = ± 15 m V Vos3 = ± 15 m V n Low crosstalk - 60 d B n Clock to center frequency ratio accuracy ± 0.2% typical n f0 x Q range up to 1.8 MHz n Pin-patible with MF10 4th Order 100 k Hz Butterworth Lowpass Filter DS005645-3 DS005645-2 Connection Diagram Surface Mount and Dual-In-Line Package DS005645-18 Top View Order Number LMF100CCN or LMF100CIWM See NS Package Number N20A or M20B LMCMOS™ is a trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS005645 .national. Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (Note 14) Supply Voltage (V+ - V- )...