LTC1068 Linear Technology, LTC1068 Datasheet - Page 26

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

LTC1068 Series
V
26
TYPICAL APPLICATIONS
5V
IN
R11 18.2k
R63 2.55k
R43 20.5k
R33 36.5k
R23 10k
R31 16.5k
R41 11.3k
LTC1068-200 8th Order Highpass, f
R21 10k
C23 [1/(2 • R23 • C23) = (160)(f
66.5k
4.99k
Maximum f
R
R53
L1
0.1 F
Attenuation – 60dB at (0.6)(f
FilterCAD Custom Inputs for f
CUTOFF
10
11
12
13
14
2nd ORDER SECTION
1
2
3
4
5
6
7
8
9
INV A
INV B
HPB/NB
BPB
LPB
SB
NC
AGND
NC
SA
LPA
BPA
HPA/NA
V
+
LTC1068-200
= 20kHz with 5V Supplies
R
U
H1
R
H3
B
C
A
D
CUTOFF
11.8k
10k
HPB/NC
INV C
INV D
)]
BPC
BPD
HPD
CLK
LPD
LPC
NC
SC
V
NC
SD
–
CENTER
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CENTER
f
0.9407
1.0723
0.9088
0.9880
O
(kHz)
C
= f
).
= 1kHz
R34 14.3k
R24 20.5k
0.1 F
CLK
R44 21k
R22 21.5k
R32 10.2k
R42 18.7k
R
R
/200,
H2
L2
1.5964
0.5156
3.4293
0.7001
20.5k
249k
Q
1068 TA19a
f
0.4212
0.2869
0.5815
0.0000
N
(kHz)
V
– 5V
200kHz
OUT
TYPE
HPN
HPN
HPN
HP
– 10
– 20
– 30
– 40
– 50
– 60
– 70
– 80
10
0
0.2
MODE
2b
3a
3a
3
Gain vs Frequency
FREQUENCY (kHz)
1
1068TA19b
10