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LTC1068 Datasheet(PDF) 25 Page - Linear Technology

Part # LTC1068
Description  Clock-Tunable, Quad Second Order, Filter Building Blocks
PDF  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1068 Datasheet(HTML) 25 Page - Linear Technology

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25
LTC1068 Series
TYPICAL APPLICATIONS
LTC1068-25 8th Order Bandpass, fCENTER = fCLK/32,
Passband – 3dB at (0.965)(fCENTER) and (1.35)(fCENTER).
Maximum fCENTER = 80kHz with ±5V Supplies
INV B
INV C
28
1
HPB/NB
HPC/NC
27
2
SB
NC
NC
SC
24
5
R21 4.99k
R22 4.99k
BPB
BPC
26
3
R31 97.6k
R32 130k
LPA
LPD
20
9
R63 6.49k
BPA
BPD
19
10
R33 124k
R34 102k
HPA/NA
HPD/ND
18
11
INV A
INV D
17
16
15
12
13
14
R23 4.99k
R24 4.99k
LPB
LPC
25
4
R51
4.99k
R11 121k
VIN
R64 6.98k
R62 9.53k
RH1 118k
VOUT
AGND
V–
23
6
V+
22
7
SA
SD
NC
NC
CLK
21
8
5V
–5V
320kHz
1068 TA18a
LTC1068-25
0.1
µF
0.1
µF
R53
4.99k
R54
4.99k
R52
4.99k
RL3
78.7K
R61
8.87k
RB2 47.5k
FREQUENCY (kHz)
7.5
10
0
–10
–20
–30
–40
–50
–60
–70
11.5
1068 TA18b
8.5
9.5
10.5
12.5
11
8
9
10
12
Gain vs Frequency
FilterCAD Custom Inputs for fC = 10kHz
2nd ORDER SECTION
fO (kHz)
Q
TYPE
MODE
B
10.2398
15.6469
BP
1b
C
10.3699
21.1060
BP
1b
A
9.6241
18.6841
LP
1b
D
9.7744
15.6092
LP
1b



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