MF5 Datasheet | National Semiconductor

Description The MF5 consists of an extremely easy to use, general purpose CMOS active filter building block and an unmitted op amp. The filter building block, together with an external clock and a few resistors, can produce various second order functions. The filter building block has 3 output pins. One of the output pins can be configured to perform highpass, allpass or notch functions and the remaining 2 output pins perform bandpass and lowpass functions. The center frequency of the filter can be directly dependent on the clock frequency or it can depend on both clock frequency and external resistor ratios. The unmitted op amp can be used for cascading purposes, for obtaining additional allpass and notch functions, or for various other applications. Higher order filter functions can be obtained by cascading several MF5s or by using the MF5 in conjuction with the MF10 (dual switched capacitor filter building block). The MF5 is functionally patible with the MF10. Any of the classical filter configurations (such as Butterworth, Bessel, Cauer and Chebyshev) can be formed. Features II Low cost III 14-pin DIP or 14-pin Surface Mount (SO) wide-body package II Easy to use II Clock to center frequency ratio accuracy ± 0.6% II Filter cutoff frequency stability directly dependent on external clock quality II Low sensitivity to external ponent variations II Separate highpass (or notch or allpass), bandpass, low- pass outputs II fo XQ range up to 200 k Hz III Operation up to 30 k Hz (typical) III Additional unmitted op-amp Block and Connection Diagrams v- BP l P INVI AGND el K 50/100 l8hn----I ~ 2 INV2 -A2 13 V AGNO D2 TLIH/S066-1 All Packages BP N/AP/HP INV1 S1 V+ l Sh 7 14 l P 13 V02 INV2 AGND V- 50/100 Order Number MF5CN See NS Package Number N14A Order Number MF5CWM See NS Package Number M14B 8 el K Top View TLIH/S066-2 1-119 Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor...