參數(shù)資料
型號: LTC1066-1
廠商: Linear Technology Corporation
英文描述: 14-Bit DC Accurate Clock-Tunable, 8th Order Elliptic or Linear Phase Lowpass Filter(14位直流精度,時鐘可調(diào),8階橢圓形或線性相位低通濾波器)
中文描述: 14位直流精確時鐘可調(diào),8階橢圓型或線性相位低通濾波器(14位直流精度,時鐘可調(diào),8階橢圓形或線性相位低通濾波器)
文件頁數(shù): 15/16頁
文件大?。?/td> 302K
代理商: LTC1066-1
15
LTC1066-1
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
TYPICAL APPLICATIO
N
S
DC Accurate Clock-Tunable Lowpass Filter with Tunable Input Anti-Aliasing Filter
(Circuit provides at least –20dB attenuation to input frequencies at 2f
CLK
.
The clock-tunable range is 5 octaves.)
+
+
+
+
13
12
11
10
R
F
+
+
+
V
IN
C
50pF
C
A
0.047
μ
F
0.1
μ
F
7
9
5
12
5
7
8
10
9
15
16
2
6
11
14
3
1
4
3
2
8
15
16
17
18
4
LTC202
13
19
LTC1045
14
R
A
PULSE
OUTPUT
6
R
P
2k
12.1k
1k
500
500
0.1
μ
F
0.1
μ
F
CLOCK INPUT
(TTL OR CMOS)
PULSE
AVERAGE
CLOCK FREQUENCY DETECTOR
20
LTC1045
1
1
μ
F
5V
0.1
μ
F
0.1
μ
F
0.1
μ
F
–5V
5V
5V
C3
C2
R1
1k
R
IN
*
200
20
20
CLOCK-TUNABLE,
8TH ORDER LOWPASS FILTER
FIRST ORDER RC
LOWPASS ANTI-ALIASING FILTER
1
2
3
4
5
6
7
8
9
C
F
18
17
16
15
14
13
12
11
10
0.1
μ
F
C1
C
IN
*
0.1
μ
F
0.1
μ
F
0.1
μ
F
V
OUT
0.1
μ
F
0.1
μ
F
–5V
C4
C5
V
+
OUT B
+IN B
GND
LTC1066-1
OUT A
–IN A
+IN A
V
V
+
CON 1
F OUT
50/100
CLK
F
IN
COMP 2
CON 2
COMP 1
V
COMPONENT CALCULATIONS FOR A CLOCK-TUNABLE RANGE OF FIVE OCTAVES:
DEFINITIONS:1.THE CUTOFF FREQUENCY OF LTC1066-1 IS ABBREVIATED AS f
2.
IS THE LOWEST CUTOFF FREQUENCY OF INTEREST
3.A RANGE OF FIVE OCTAVES IS FROM f
COMPONENT CALCULATIONS:
1
2
π
R
F
C
F
C(LOW)
C2 = C1, C3 = 2C1, C4 = 4C1, C5 = 8C1
C
C(LOW)
TO 32f
C(LOW)
EXAMPLE:
C(LOW)
= f
IN
* = R
F
(IF R
CAN BE CHOSEN TO BE 20k, R
AND C
ARE OMITTED.
f
C(LOW)
/125 ALLOWS FOR 0.2dB GAIN PEAK IN THE PASSBAND)
C1 = f
μ
F (f
C(LOW)
IN Hz) ; R1 = 1k
5
C(LOW)
×
10
5
C(LOW)
C
P
= 50pF; R
P
= 50f
C
A
= 0.047
μ
F; R
A
= 50f
LET’S CHOOSE A FIVE OCTAVE RANGE FROM 1kHz TO 32kHz. f
= 1kHz (1000Hz).
LET C
F
= 1
μ
F, THEN R
F
CALCULATES TO BE 20k. R
IN
AND C
IN
OMITTED;
R1 = 1k, C1 = 0.001
μ
F, C2 = 0.001
μ
F, C3 = 0.0022
μ
F, C4 = 0.0039
μ
F,
C5 = 0.0082
μ
F. C
P
= 50pF, R
P
= 2k, C
A
= 0.047
μ
F, R
A
= 10k
1066-1 TA08
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LTC1066-1_09 制造商:LINER 制造商全稱:Linear Technology 功能描述:14-Bit DC Accurate Clock-Tunable, 8th Order Elliptic or Linear Phase Lowpass Filter
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