LTC6601-1 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC6601-1
Linear Technology
'LTC6601-1' PDF : 40 Pages View PDF
LTC6601-1
APPLICATIONS INFORMATION
R2
C2
R1
R3
R4A
VIN(DIFF) REXT
C3A
49.9Ω
C3B
R4B
R1
R3
R2
R4 = R4A + R4B + REXT
C3 = C3A || C3B
C1
+–
–+
C1
C2
VOUT(DIFF)
66011 F13
( ) ( ) fO • 6089 •
3568 • Q4 1788 • Q2 + 447
+ 1.287 • 105
•
2 • Q2
1
f3dB =
507.6 • Q
0.2236 • fO •
Q=
( ) ( ) 2.109 • 105 •
9.891• 1012 • f3dB4 5.486 • 109 • fO4
+ 120 •
5.526 • 109 • f3dB2 + 3.082 • 106 • fO2
( ( ) ) 16 • fO2 • 8.29 • 109 • f3dB2 + 4.127 • 109 • fO2 6.638 • 1010 • f3dB4
R4 =
1.25 • 104 • C1• Q • R2
( ) ( ) 559 • C1•
R2 •
C2 + 2 • C3
C1
50 • Q •
C1•
125 • GAIN + R2 + 125
C2 • R2
GAIN
( ) VOUT(DIFF)
( ( ) ( ) ) ( ) VIN(DIFF)
=
–
S2 +
R1•
R2 • R3 • C1• C2 + 2 • C3
R2 • 2 • R3 + R4 + R3 • R4 + R2 • R3 • R4
R1• R2 • R3 • R4 • C2 + 2 • C3
•S+
1
R2 • R3 • C1• C2 + 2 • C3
GAIN =
–
VOUT(DIFF)
VIN(DIFF)
=
– R2
R1
( ) fO = 2 • •
1
R2 • R3 • C1• C2 + 2 • C3
Q
=
1+
R3
R2
•
1+| GAIN |
C2
C1
+
2
•
C3
C1
+2
•
R2
R4
•
R3
R2
–
C2
C1
Figure 13. Modified Filter Topology and Equations
66011f
32
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