ltc1264-7csw-trpbf Linear Technology Corporation, ltc1264-7csw-trpbf Datasheet - Page 9

• Manufacturer Part Number: ltc1264-7csw-trpbf
• Description: High Speed, Quad Universal Filter Building Block
• Manufacturer: Linear Technology Corporation

W
BLOCK
ODES OF OPERATIO
V
IN
I D AGRA
R1
AGND
–
+
INV A
AGND
INV B
INV C
INV D
R4
R3
R2
W
Figure 9. Mode 2n, 2nd Order Filter Providing a Lowpass Notch Output
12
13
24
6
1
HP
–
+
–
+
–
+
–
+
+
C
U
C
Σ
–
1/4 LTC1264
S
∫
HPB/NB
HPA/NA
HPC/NC
HPD/ND
11
23
14
2
R
H
+
+
+
+
BP
–
–
–
–
∫
SA
SB
Σ
20
SC
SD
Σ
Σ
Σ
17
8
5
LP
+
+
+
+
R
∫
∫
∫
∫
L
BPA
BPC
BPD
BPB
10
22
15
3
–
+
R
EXTERNAL OP AMP OR
INPUT OP AMP OF THE
LTC1264, SIDES A, B, C, D
G
+
+
+
+
∫
∫
∫
∫
f
f
H
Q = 1.005
LPA
LPB
LPC
LPD
i
O
16
21
OLPn
=
9
4
= f
f
CLK
20
i
(f = 0)=
√
LOWPASS
NOTCH
OUTPUT
; f
( ) √
1 +
n
R3
R2
1264 BD
= f
18
19
7
R2
R4
(
i
R
R
√
G
H
1 +
V
CLK
V
1 +
+
+
–
R
R
R2
R4
R
R
G
L
H
L
)
( )
R2
R1
(
1 –
(
1 +
6.42•R4
1
1
1264 G09
R3
LTC1264
R2
R4
)
)
1264fb
9