LMF60CIN-50 National Semiconductor, LMF60CIN-50 Datasheet - Page 18

• Manufacturer Part Number: LMF60CIN-50
• Description: IC HIPERFM 60RD SW CAO FIL 14DIP
• Manufacturer: National Semiconductor

Specifications of LMF60CIN-50

• Filter Type: Butterworth, Lowpass Switched Capacitor
• Frequency - Cutoff Or Center: 30kHz
• Number Of Filters: 1
• Max-order: 6th
• Voltage - Supply: 4 V ~ 14 V, ±2 V ~ 7.5 V
• Mounting Type: *
• Package / Case: *
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *LMF60CIN-50

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2 0 Designing with the LMF60
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FIGURE 15 Second Order Butterworth Anti-Aliasing Filter Using Uncommitted Op-Amp
f
H
Design Procedure
pick C
R
for a 2nd Order Butterworth Q
R
make R
and
C
Note The parallel combination of R
0
0
2
2
2
e
e
e
e
e
2
2QC
0 113
(2 f
1
R
C
1
4
1
f
R
1
e
0
R
0
1 0
1
R
3
1
1
R
R
1
(H
2
2
)
2
C
0
C
1
C
1
e
2
1 when R
3
e
and R
0 707
4
(if used) R
4
(Continued)
are omitted and V
1
and R
18
2
O2
should be
is directly tied to INV2)
t
10 k
in order not to load Op-Amp
2
2
TL H 9294 – 31