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參數(shù)資料
| 型號： | LTC1066-1CS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | 14-Bit DC Accurate Clock-Tunable, 8th Order Elliptic or Linear Phase Lowpass Filter |
| 中文描述： | SWITCHED CAPACITOR FILTER, ELLIPTIC/BESSEL, LOWPASS, PDSO18 |
| 封裝： | PLASTIC, SOL-18 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 363K |
| 代理商： | LTC1066-1CS |
14
LTC1066-1
TYPICAL APPLICATIO
N
S
1066-1 TA06
7.5V
–7.5V
7.5V
2ND ORDER RC ANTI-ALIASING
FILTER PROVIDES –36dB ATTENUATION
TO INPUTS AT 2f
CLK
402
1k
–7.5V
V
OUT
V
IN
f
CLK
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
OUT A
–IN A
+IN A
V
–
V
+
CONNECT 1
FILTER
OUT
50/100
CLK
V
+
OUT B
+IN B
GND
FILTER
IN
COMP 2
CONNECT 2
COMP 1
V
–
0.1
μ
F
0.1
μ
F
0.1
μ
F
LTC1066-1
20
20
20k
0.1
μ
F
1
μ
F
C
C
f
–3dB
= 5f
CUTOFF
C = f
μ
F (f
–3dB
IN Hz)
f
CUTOFF
=
f
CLK
50
–3dB
f
IS THE –3dB FREQUENCY
OF THE 2ND ORDER RC FILTER
DC Accurate Lowpass Filter with Input Anti-Aliasing
(f
CLK
≤
250kHz)
DC Accurate Lowpass Filter with Input Anti-Aliasing
(f
CLK
> 250kHz)
1066-1 TA05
7.5V
–7.5V
7.5V
2ND ORDER BUTTERWORTH ANTI-
ALIASING FILTER PROVIDES –68dB
ATTENUATION TO INPUTS AT 2f
CLK
–7.5V
V
OUT
V
IN
f
CLK
C
F
R
F
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
C2
OUT A
–IN A
+IN A
V
–
V
+
CONNECT 1
FILTER
OUT
50/100
CLK
V
+
OUT B
+IN B
GND
FILTER
IN
COMP 2
CONNECT 2
COMP 1
V
–
0.1
μ
F
0.1
μ
F
0.1
μ
F
LTC1066-1
20
20
R1
R2
0.1
μ
F
C1
f
CUTOFF
= f
f
= 2f
(f
IS THE –3dB FREQUENCY OF THE
1
FOR CUTOFF FREQUENCIES 2kHz TO 5kHz, SET R
F
= 20k,
C
= 1
μ
F AND R1 + R2
≤
2k
FOR CUTOFF FREQUENCIES <2kHz, SET R1 + R2 = R
F
FOR EXAMPLE:
IF THE CUTOFF FREQUENCY OF LTC1066-1 IS 500Hz, THEN
f
–3dB
= 1000Hz
CLK
50
f
CUTOFF
250
1
2
π
R
F
C
F
= 2Hz, SET R
F
= 80.6k, C
F
= 1
μ
F AND C1 = 0.0027
μ
F
1
2
π
R
F
C
F
R1 + R2 = 80.6k, R1 = 4.22k AND R2 = 76.8k ROUNDED TO NEAREST 1% VALUE.
C2 = 0.027
μ
F ROUNDED TO NEAREST STANDARD VALUE.
NOTE:
R
F
SHOULD BE
≤
100k TO MINIMIZE DC OFFSET TO ±5.5mV
2
π(
R1 + R2)C1= 0.707f
–3dB
, R2 = 17.946R1, C2 = 10C1
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