MF5CWM National Semiconductor, MF5CWM Datasheet - Page 9

• Manufacturer Part Number: MF5CWM
• Description: IC FILTER MONO SW CAP SO14
• Manufacturer: National Semiconductor

Specifications of MF5CWM

• Filter Type: Universal Switched Capacitor
• Frequency - Cutoff Or Center: 30kHz
• Number Of Filters: 1
• Max-order: 2nd
• Voltage - Supply: 8 V ~ 14 V
• Mounting Type: *
• Package / Case: *
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *MF5CWM

2 0 Modes of Operation
MODE 3a HP BP LP and Notch with External Op amp
f
Q
H
H
H
f
H
H
H
o
n
OHP
OBP
OLP
on
n1
n2
e
e
e b
e b
e b
e
e
e
e
f
notch frequency
gain of notch at f
gain of notch (as f
gain of notch
100
CLK
(See Figure 11 )
R4
R1
R2
R1
R3
R1
R2
R4
c
c
R3
R2
R2
R4
or
as f
f
CLK
e
e
50
f
f
100
o
CLK
c
e
0)
f
Q
CLK
2
R2
R4
e
R
R
h
R
l
R
(Continued)
R
R
or
g
l
e b
g
l
H
c
f
CLK
OLP
50
H
R
R
OLP
b
g
h
R
R
c
R
R
g
h
FIGURE 11 MODE 3a
FIGURE 12 MODE 4
h
H
l
H
OHP
OHP
9
MODE 4 Allpass Bandpass Lowpass Outputs (See
f
Q
H
H
H
Circuit dynamics H
occurs causing a 0 4 dB peaking around f
response (which theoretically should be a straight line) If this is unaccept-
able Mode 5 is recommended
o
Due to the sampled data nature of the filter a slight mismatch of f
OLP
OBP
OAP
e
e
e
e
e
e b
e
e b
f
z
Figure 12 )
e
Q
For AP output make R1
Allpass gain at 0
center frequency
f
BW
Lowpass gain (as f
Bandpass gain (at f
100
CLK
f
o
z
center frequency of the complex zero pair j f
R3
R2
e
e
R2
R1
or
quality factor of complex zero pair
R3
R2
f
1
CLK
a
50
OBP
a
1
R2
R1
e
e b
(H
e b
k
OLP
2
e
f
TL H 5066– 21
k
2
)
f
o
o
e
f
0)
c
)
CLK
of the allpass filter amplitude
2
R3
R2
R2
Q
e
e b
(H
TL H 5066 – 20
OAP
R2
R1
a
e b
e
1) Q
z
R3
R1
and f
1
o
o