Datasheet

LTC1068 Series
22
1068fc
TYPICAL APPLICATIONS
LTC1068 8th Order Linear Phase Bandpass, f
CENTER
= f
CLK
/128,
Passband –3dB at (0.88)(f
CENTER
) and (1.12)(f
CENTER
). Maximum
f
CENTER
= 40kHz with ±5V Supplies
FilterCAD Custom Inputs for f
C
= 10kHz
2nd ORDER SECTION f
0
(kHz) Q f
N
(kHz) TYPE MODE
B 8.2199 2.6702 4.4025 HPN 3a
C 9.9188 3.3388 BP 1b
A 8.7411 2.1125 21.1672 LPN 3a
D 11.3122 5.0830 BP 1b
Gain vs Frequency
INV B INV C
241
HPB/NB HPC/NC
232
SB SC
205
R21
4.99k
R22
4.99k
BPB BPC
223
R31
19.6k
R41
12.1k
R32
21.5k
LPA LPD
169
R43
10.7k
BPA BPD
1510
R33
14.7k
HPA/NA HPD/ND
1411
INV A INV D
1312
R23
4.99k
R34
28.7k
R24
4.99k
LPB LPC
214
R11
26.1k
V
IN
R
L1
63.4k
R
H1
7.5k
R
B2
16.2k
R
H3
40.2k
AGND V
–
19
6
V
+
CLK
18
7
SA SD
178
5V
–5V
1.28MHz
1068 TA15
LTC1068
R52
4.99k
R54
4.99k
0.1µF
0.1µF
R62
7.5k
R64 17.8k
R
L3
14.7k
V
OUT
FREQUENCY (kHz)
1
GAIN(dB)
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
10 100
1068 TA16
24-Lead Package