Datasheet

14
LTC1264
1264fb
U
SA
O
PP
L
IC
AT
ITY
P
I
CA
L
Clock-Tunable, 8th Order Elliptic Lowpass Filter, f
CLK
/f
CUTOFF
= 20:1
Gain vs Frequency100kHz, 8th Order Notch Filter, f
CLK
/f
CENTER
= 20:1
FREQUENCY (Hz)
10k
GAIN (dB)
10
0
–10
–20
–30
–40
–50
–60
–70
–80
100k 1M
1264 TA06b
V
S
= ±7.5V
f
CLK
= 2MHz
FREQUENCY (Hz)
10k
GAIN (dB)
0
–10
–20
–30
–40
–50
–60
–70
–80
100k 1M
1264 TA03b
V
S
= ±7.5V
f
CLK
= 2MHz
Gain vs Frequency
R2
R1
IN
1264 TA06a
OUT
INV B
HPB/NB
BPB
LPB
SB
AGND
V
+
SA
LPA
BPA
HPA/NA
INV A
INV C
HPC/NC
BPC
LPC
SC
V
–
CLK
SD
LPD
BPD
HPD/ND
INV D
R3
R1
R2
R3
R1
LTC1264
0.1µF
0.1µF
7.5V
–7.5V
f
CLK
2MHz
C
R2
R3
R2
R3
C
R1
B
1
36.5k
10k
50k
C
1
3.92k
10k
27.4k
30pF
A
1
7.5k
10k
50k
D
1
9.09k
10k
50k
30pF
LTC1264 SIDE
MODE
R1
R2
R3
C
1264 TA03a
POWER SUPPLY
±7.5V
±5V
SINGLE 5V
MAXIMUM f
CLK
3.6MHz (C = 10pF)
2.0MHz (C = 10pF)
1.6MHz (C = 10pF)
R2
R
H
IN
OUT
INV B
HPB/NB
BPB
LPB
SB
AGND
V
+
SA
LPA
BPA
HPA/NA
INV A
INV C
HPC/NC
BPC
LPC
SC
V
–
CLK
SD
LPD
BPD
HPD/ND
INV D
R3
R2
R4
R1
LTC1264
7.5V
0.1µF
–7.5V
R
L
R4
R
H
R
L
R3
C
R2
R3
R4
C
0.1µF
f
CLK
2MHz
R4
R3
R2
R
H
R
L
LTC1264 SIDE
MODE
R1
R2
R3
R4
R
H
R
L
C
B
3a
27.4k
23.7k
20k
28k
137k
27.4k
C
2n
20k
37.4k
100k
100k
31.6k
3pF
A
2n
20k
37.4k
100k
130k
24.3k
3pF
D
3
29.4k
19.1k
48.7k