LTC1068 Linear Technology, LTC1068 Datasheet - Page 20

• Manufacturer Part Number: LTC1068
• Description: Clock-Tunable/ Quad Second Order/ Filter Building Blocks
• Manufacturer: Linear Technology

LTC1068 Series
20
TYPICAL APPLICATIONS
V
5V
IN
R11 32.4k
R63 8.45k
2.21k
R61
LTC1068-25 8th Order Lowpass, f
Attenuation – 50dB at (1.25)(f
R33 118k
R21 10k
R31 10k
R23 10k
(1.5)(f
0.1 F
20.5K
4.99k
4.99k
26.7k
R51
R53
R
R
L1
L3
CUTOFF
FilterCAD Custom Inputs for f
10
11
12
13
14
1
2
3
4
5
6
7
8
9
). Maximum f
2nd ORDER SECTION
INV B
HPB/NB
BPB
LPB
NC
NC
SA
LPA
BPA
HPA/NA
INV A
SB
AGND
V
+
LTC1068-25
R
R
H1
H3
U
D
B
C
A
18.2k
53.6k
HPD/ND
HPC/NC
CUTOFF
INV C
INV D
CUTOFF
BPC
LPD
BPD
LPC
CLK
SC
V
NC
NC
SD
–
CUTOFF
16
28
27
26
25
24
23
22
21
20
19
18
17
15
)and – 60dB at
= 120kHz
101.4936
70.9153
94.2154
79.7030
f
= f
O
(kHz)
CLK
C
R52
4.99k
R54
4.99k
R64 3.16k
= 100kHz
0.1 F
R34 15k
R24 10k
/32,
R32 32.4k
R
R
R22 10k
H2
L2
R62 5.9k
40.2k
36.5k
0.5540
2.3848
9.3564
0.9340
Q
1068 TA13a
154.1187
230.5192
127.2678
f
N
(kHz)
V
3.2MHz
–5V
OUT
TYPE
LPN
LPN
LPN
LP
– 80
–20
–30
–40
–50
– 60
–70
–10
10
0
MODE
20
1bn
1bn
1bn
1b
Gain vs Frequency
FREQUENCY (kHz)
100
1069 TA13b
500