MF10CCN National Semiconductor, MF10CCN Datasheet - Page 14

• Manufacturer Part Number: MF10CCN
• Description: IC, FILTER DUAL SWITCHED CAP, DIP20
• Manufacturer: National Semiconductor

Specifications of MF10CCN

• Filter Order: Fourth
• No. Of Filters: 2
• Cutoff Frequency: 30kHz
• Program Clock Frequency Typ: 30kHz
• Supply Voltage Range: ± 9V To ± 14V
• Operating Temperature Range: 0°C To +70°C
• Filter Ic Case: RoHS Compliant
• Ic Filter Type: Switched Capacitor
• Rohs Compliant: Yes

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1.0 Definition of Terms
2.0 Modes of Operation
The MF10 is a switched capacitor (sampled data) filter. To
fully describe its transfer functions, a time domain approach
is appropriate. Since this is cumbersome, and since the
MF10 closely approximates continuous filters, the following
discussion is based on the well known frequency domain.
Each MF10 can produce a full 2nd order function. See Table
1 for a summary of the characteristics of the various modes.
MODE 1: Notch 1, Bandpass, Lowpass Outputs:
f
f
O
notch
= center frequency of the complex pole pair
= center frequency of the imaginary zero pair = f
(a) Bandpass
f
notch
= f
(d) Notch
O
FIGURE 6. Response of various 2nd-order filters as a function of Q.
(See Figure 7 )
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Gains and center frequencies are normalized to unity.
(Continued)
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O
.
(b) Low Pass
14
BW = the −3 dB bandwidth of the bandpass output.
Circuit dynamics:
MODE 1a: Non-Inverting BP, LP (See Figure 8 )
Note: V
= quality factor of the complex pole pair
IN
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should be driven from a low impedance (
(e) All-Pass
(c) High-Pass
<
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1 k ) source.
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