MF5CWM National Semiconductor, MF5CWM Datasheet - Page 5

• 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

Typical Performance
Characteristics
1 0 Definitions of Terms
f
pin 8
f
pole pair f
and is the frequency of maximum bandpass gain ( Figure 1 )
f
notch output
f
pair if any If f
CLK
o
notch
z
the center frequency of the second order complex zero
center frequency of the second order function complex
the frequency of the external clock signal applied to
the frequency of minimum (ideally zero) gain at the
o
is measured at the bandpass output of the MF5
(a)
(a)
(a)
z
is different from f
FIGURE 1 2nd-Order Bandpass Response
FIGURE 3 2nd-Order High-Pass Response
FIGURE 2 2nd-Order Low-Pass Response
Supply Current vs Temperature
(Continued)
TL H 5066– 7
TL H 5066– 9
o
TL H 5066–5
and if Q
z
is high it can be
TL H 5066 – 4
(b)
(b)
(b)
5
ure 1 ) The value of Q determines the shape of the 2nd
observed as the frequency of a notch at the allpass output
( Figure 10 )
Q ‘‘quality factor’’ of the 2nd order filter Q is measured at
the bandpass output of the MF5 and is equal to f
the
order filter responses as shown in Figure 6
Q
if any Q
written
H
where Q
H
H
( Figure 2 )
H
f
H
as f
and below the center frequency ( Figure 4 ) When the low-
frequency gain differs from the high-frequency gain as in
modes 2 and 3a ( Figures 11 and 8 ) the two quantities be-
low are used in place of H
H
H
z
AP
OBP
OLP
OHP
ON
ON1
ON2
the quality factor of the second order complex zero pair
b
(s)
the gain (in V V) of the notch output as f
3dB bandwidth of the 2nd order bandpass filter ( Fig-
f
the gain (in V V) of the lowpass output as f
the gain (in V V) of the notch output as f
the gain (in V V) of the notch output as f
the gain (in V V) of the bandpass output at f
TL H 5066 – 10
clk
e
TL H 5066 – 8
the gain (in V V) of the highpass output as
TL H 5066 – 6
z
z
f
H
e
clk
2 ( Figure 3 )
is related to the allpass characteristic which is
OAP
Q for an all-pass response
2 when the notch filter has equal gain above
s
2
a
s
2
s
b
H
f
f
H
H
f
f
H
Q
c
p
c
p
LP
OP
HP
OP
e
e
e
e
o
s
Q
(s)
f
(s)
o c
e
e
a
f
f
f
H
Q
f
f
o c
o
o c
z
L
H
o
ON
e
BP
e
o
H
H
e
e
e
a
e
OLP c
s
OHP c
(s)
1
s
2
o
f
f
f
2
H
o
o
b
2
a
2 f
a
e
H
f
b
o
H
2Q
o
b
1
2Q
1
OHP
s
2Q
OLP o
1
2
s
o
s
1
1
Q
f
Q
1
b
Q
1
b
1
L
Q
b
2
2
o
a
o
a
a
s
a
2Q
2Q
H
2Q
2
a
1
f
1
OBP
1
1
1
o
s
2
1
2
2
2
1
b
Q
e
o
b
2
o
b
o
a
Q
4Q
4Q
a
2Q
2
a
2Q
1
o
f
1
1
1
1
L
2
s
f
2
H
o
2
2
1
2
a
b
a
1
o
2Q
1
b
divided by
1
1
0 Hz and
2Q
2
1
0 Hz
f
e
clk
2
2
a
0 Hz
f
2
1
o
2
a
b
1
1