LTC1064
TYPICAL APPLICATIO S
U
Clock-Tunable, 30kHz to 90kHz 8th Order Notch Filter
Providing Notch Depth in Excess of 60dB
R13
R14
C2
Amplitude Response
1
2
24
23
22
21
20
19
18
17
16
15
14
13
INV B
HPB/NB
BPB
INV C
HPC/NC
BPC
10
0
R23
R33
R22
R32
R42
BW
3
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
4
LPB
LPC
0.1µF
5
SB
SC
6
–
C1
AGND
V
–8V
LTC1064
7
+
8V
V
CLK
50/100
LPD
f
≤ 5MHz
CLK
C3
0.1µF
8
SA
R12
9
LPA
V
f
= ±8V
= 4MHz
R31
R21
R44
R34
R24
S
CLK
10
11
12
C1 = C2 = C3 = 15pF
BPA
BPD
THE NOTCH DEPTH FROM
5kHz TO 30kHz IS 50dB
HPA/NA
INV A
HPD
10
30
40
50
60
70
20
R11
WIDEBAND NOISE = 300µV
RMS
INV D
V
IN1
INPUT FREQUENCY (kHz)
R
L4
0.1%
1064 TA22
R
G
R
H4
0.1%
–
+
RESISTOR VALUES:
R11 = 50k R21 = 5k
R31 = 50k
R
R
R
= 68.1k
L4
H4
LT1056
V
G
OUT
R12 = 15.4k R22 = 10k R32 = 88.7k R42 = 48.7k
= 10k (0.1%)
= 10k (0.1%)
R13 = 10k
R23 = 10k R33 = 100k
R14 = 9.09k R24 = 10k R34 = 63.4k R44 = 12.4k
1064 TA21
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENT
LTC1061
Triple Universal Filter Building Block
Quad Universal Building Blocks
Three Filter Building Blocks in a 20-Pin Package
f :f = 25:1, 50:1, 100:1 and 200:1
CLK
LTC1068 Series
LTC1164
O
Low Power, Quad Universal Filter Building Block
High Speed, Quad Universal Building Block
Low Noise, Low Power Pin-for-Pin LTC1064 Compatible
Up to 250kHz Center Frequency
LTC1264
1064fb
LT/LT 0905 REV B • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
20
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
© LINEAR TECHNOLOGY CORPORATION 1989