LTC1068 Linear Technology, LTC1068 Datasheet - Page 21

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

TYPICAL APPLICATIONS
Passband – 3dB at (0.88)(f
V
LTC1068 8th Order Linear Phase Bandpass, f
IN
26.1k
R11
5V
4.99k
19.6k
12.1k
R21
R31
R41
10.7k
14.7k
4.99k
R43
R33
R23
14.7k
f
R
CENTER
L3
0.1 F
FilterCAD Custom Inputs for f
10
11
12
= 40kHz with 5V Supplies
1
2
3
4
5
6
7
8
9
2nd ORDER SECTION
INV B
HPB/NB
BPB
LPB
SB
AGND
V
SA
LPA
BPA
HPA/NA
INV A
CENTER
+
63.4k
R
7.5k
LTC1068
R
H1
L1
U
) and (1.12)(f
B
C
A
D
40.2k
HPD/ND
HPC/NC
R
H3
INV D
INV C
BPC
LPD
BPD
LPC
CLK
SD
SC
V
–
24
23
22
21
20
19
18
17
16
15
14
13
1.28MHz
CENTER
4.99k
CENTER
R24
R54
4.99k
R52
4.99k
28.7k
f
11.3122
R34
8.2199
9.9188
8.7411
O
4.99k
21.5k
(kHz)
R22
R32
C
R64 17.8k
V
= 10kHz
). Maximum
= f
OUT
16.2k
R62
7.5k
R
CLK
B2
0.1 F
–5V
/128,
2.6702
3.3388
2.1125
5.0830
1068 TA14a
Q
24-Lead Package
21.1672
f
4.4025
N
(kHz)
–10
–20
–30
–40
–50
–60
–70
–80
–90
TYPE
10
HPN
LPN
0
BP
BP
1
MODE
Gain vs Frequency
1b
1b
3a
3a
FREQUENCY (kHz)
LTC1068 Series
10
1068 TA14b
100
21