MF4CN-50 National Semiconductor, MF4CN-50 Datasheet
MF4CN-50
Specifications of MF4CN-50
MF4NC-50
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MF4CN-50 Summary of contents
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... No external components 14V supply voltage n Cutoff frequency range of 0 kHz n Cutoff frequency accuracy of n Cutoff frequency set by external clock n Separate TTL and CMOS/Schmitt-trigger clock inputs Dual-In-Line Package DS005064-2 Order Number MF4CN-50 See NS Package Number N08E DS005064-1 July 1999 ± 0.3% typical www.national.com ...
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Block Diagram (Continued) Pin Descriptions Pin Pin Function # Name 1 CLK IN A CMOS Schmitt-trigger input to be used with an external CMOS logic level clock. Also used for self clocking Schmitt-trigger oscillator (see section 1.1). 2 CLK R ...
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... Storage Temperature ESD Susceptibility (Note 13) Soldering Information (10 sec.) Operating Ratings 14V + V + 0.2V Temperature Range − V − 0.2V MF4CN- − Supply Voltage (V – 500 mW 250 kHz (Note 5) unless otherwise specified. Boldface limits apply for T Conditions Typical Tested (Note 10) (Note 11) ...
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Filter Electrical Characteristics The following specifications apply for 25˚ all other limits T MAX A J Parameter + − = +2.5V −2.5V V Stopband Attenuation (Min) DC Offset Voltage Minimum Output ...
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Logic Input-Output Characteristics − (Note 7) unless otherwise specified. Boldface limits apply for T The following specifications apply for 25˚C. other limits Parameter TTL CLOCK INPUT, CLK R PIN (Note 9) ...
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Typical Performance Characteristics Power Supply Current vs Power Supply Voltage DS005064-26 Positive Voltage Swing vs Power Supply Voltage DS005064-29 Negative Voltage Swing vs Temperature DS005064-32 www.national.com Power Supply Current vs Clock Frequency DS005064-27 Negative Voltage Swing vs Power Supply Voltage ...
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Typical Performance Characteristics f /f Deviation CLK c vs Temperature DS005064-38 1.0 MF4 Application Hints The MF4 is a non-inverting unity gain low-pass fourth-order Butterworth switched-capacitor filter. The switched-capacitor topology makes the cutoff frequency (where the gain drops 3.01 dB ...
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MF4 Application Hints If the MF were set up for a cutoff frequency of 10 kHz the in- put impedance would be: In this example with a source impedance of 10K the overall gain, if the MF4 had an ...
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Designing With The MF4 (Continued) 2.3 CHANGING CLOCK FREQUENCY INSTANTANEOUSLY The MF4 will respond favorably to an instantaneous change in clock frequency. If the control signal in Figure 12 is low the = 2 kHz; when this MF4-50 has ...
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Designing With The MF4 FIGURE 3. Split Supply Operation with TTL Level Clock FIGURE 4. Single Supply Operation. ANGD Resistor Biased Equivalent Circuit for MF4 Filter Input www.national.com (Continued) DS005064-15 b) Actual Circuit for MF4 Filter ...
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Designing With The MF4 DS005064-44 FIGURE 6. MF4-50 Amplitude Response with Supplies FIGURE 8. Design Example Magnitude Response Specification where the Response of the Filter Design must fall within the shaded area of the specification (Continued) ± 5V FIGURE ...
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Designing With The MF4 DS005064-47 FIGURE 10. One MF4-50 vs Two MF4-50s Cascaded DS005064-48 FIGURE 11. Phase Response of Two Cascaded MF4-50s www.national.com (Continued) FIGURE 9. Cascading Two MF4s FIGURE 12. MF4-50 Abrupt Clock Frequency Change FIGURE 13. MF4-50 ...
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Designing With The MF4 (a) input signal spectrum FIGURE 14. The phenomenon of aliasing in sampled-data systems. An input signal whose frequency is greater than one-half the sampling frequency will cause an output to appear at a frequency lower ...
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... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. Molded Dual-In-Line Package (N) Order Number MF4CN-50 NS Package Number N08E 2. A critical component is any component of a life ...