Datasheet

LTC1068 Series
25
1068fc
TYPICAL APPLICATIONS
LTC1068-50 8th Order Linear Phase Bandpass, f
CENTER
= f
CLK
/40,
Passband –3dB at (0.8)(f
CENTER
) and (1.2)(f
CENTER
) for Single Supply
Low Power Applications. Maximum f
CENTER
= 25kHz with a Single 5V
Supply
FilterCAD Custom Inputs for f
C
= 10kHz
2nd ORDER SECTION f
0
(kHz) Q f
N
(kHz) TYPE MODE
B 8.7384 4.0091 4.0678 HPN 2b
C 11.6756 4.6752 19.1786 LPN 2n
A 10.8117 4.2066 16.0127 LPN 2n
D 9.6415 3.6831 BP 2
Gain vs Frequency
INV B
INV C
281
HPB/NB
HPC/NC
272
SB
NC
NC
SC
245
R21 10k
R22 11.3k
BPB BPC
263
R31 30.1k
R41 10.7k
R32 29.4k
R42 10k
LPA LPD
209
BPA BPD
1910
R33 26.7k
R43 12.1k
R34 28k
R44 22.1k
HPA/NA
HPD/ND
1811
INV A
INV D
17
16
15
12
13
14
R23 10k
R24 10k
LPB
LPC
25
4
R51
4.99k
R
H2
84.5k
R11 36.5k
V
IN
R
H1
18.2k
R
H3
47.5k
V
OUT
AGND
V
–
236
V
+
22
7
SA
SD
NC
NC
CLK
21
8
5V
400kHz
1068 TA21
LTC1068-50
0.1µF1µF
R
L3
15.8K
R61
1.74k
R
L2
17.8k
FREQUENCY (kHz)
2 64
–80
GAIN (dB)
–70
–50
–40
–30
14 18 22
10
1068 TA22
–60
10 128 2826242016
–20
–10
0