LTC1068(RevA) データシートの表示（PDF） - Linear Technology
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LTC1068 Datasheet PDF : 28 Pages
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LTC1068 Series
TYPICAL PERFORMANCE CHARACTERISTICS
LTC1068-200
Maximum Q vs Center Frequency
(Modes 2, 3)
55
50
A: VS = 3.3V, fCLK(MAX) = 1.2MHz
B: VS = 5V, fCLK(MAX) = 3.2MHz
45
C: VS = ± 5V, fCLK(MAX) = 6.1MHz
40
(FOR MODE 2, R4 < 10R2)
35
30
25
20
15
10
5
A
BC
0
0 4 8 12 16 20 24 28 32
CENTER FREQUENCY, fO (kHz)
1068 G04
LTC1068-25
Maximum Q vs Center Frequency
(Modes 1, 1b, 2)
55
50
A: VS = 3.3V, fCLK(MAX) = 1.2MHz
B: VS = 5V, fCLK(MAX) = 3.4MHz
45
C: VS = ± 5V, fCLK(MAX) = 6.1MHz
40
(FOR MODE 2, R4 ≥ 10R2)
35
30
25
20
15
10
5
A
B
C
0
0 32 64 96 128 160 192 224
CENTER FREQUENCY, fO (kHz)
1068 G07
LTC1068-200 Center Frequency
Variation vs Clock Frequency
0.20
0.15
0.10
0.05
MODE 3
0
– 0.05
– 0.10
MODE 1
– 0.15 VS = ± 5V
Q = 5, REFERENCE
– 0.20 CENTER FREQUENCY
WITH fCLK = 0.75MHz
– 0.25
0.75 1.25 1.75 2.25 2.75 3.25 3.75 4.25
CLOCK FREQUENCY (MHz)
1068 G10
LTC1068-50
Maximum Q vs Center Frequency
(Modes 1, 1b, 2)
55
50
A: VS = 3.3V, fCLK(MAX) = 1.1MHz
B: VS = 5V, fCLK(MAX) = 2.1MHz
45
C: VS = ± 5V, fCLK(MAX) = 3.6MHz
40
(FOR MODE 2, R4 ≥ 10R2)
35
30
25
20
15
BC
10
A
5
0
0 4 8 12 16 20 24 28 32
CENTER FREQUENCY, fO (kHz)
1068 G05
LTC1068-25
Maximum Q vs Center Frequency
(Modes 2, 3)
55
50
A: VS = 3.3V, fCLK(MAX) = 1MHz
B: VS = 5V, fCLK(MAX) = 3MHz
45
C: VS = ± 5V, fCLK(MAX) = 5MHz
40
(FOR MODE 2, R4 < 10R2)
35
30
25
20
15
10
5
A
B
C
0
0 32 64 96 128 160 192 224
FREQUENCY, fO (kHz)
1068 G08
LTC1068-50 Center Frequency
Variation vs Clock Frequency
0.4
MODE 1
0.3
MODE 3
0.2
0.1
0
VS = ± 5V
– 0.1 Q = 5, REFERENCE
CENTER FREQUENCY
WITH fCLK = 0.5MHz
– 0.2
0.5 0.75 1.0 1.25 1.5 1.75 2.0
CLOCK FREQUENCY (MHz)
1068 G11
LTC1068-50
Maximum Q vs Center Frequency
(Modes 2, 3)
55
50
A: VS = 3.3V, fCLK(MAX) = 1.1MHz
B: VS = 5V, fCLK(MAX) = 2.1MHz
45
C: VS = ± 5V, fCLK(MAX) = 3.6MHz
40
(FOR MODE 2, R4 < 10R2)
35
30
25
20
15
C
B
10
5
A
0
0 4 8 12 16 20 24 28 32
CENTER FREQUENCY, fO (kHz)
1068 G06
LTC1068 Center Frequency
Variation vs Clock Frequency
1.2
VS = ± 5V
1.0 Q = 5, REFERENCE
CENTER FREQUENCY
0.8 WITH fCLK = 0.75MHz
0.6
MODE 3
0.4
MODE 1
0.2
0
– 0.2
– 0.4
– 0.6
0.75 1.25 1.75 2.25 2.75 3.25 3.75 4.25
CLOCK FREQUENCY (MHz)
1068 G09
LTC1068-25 Center Frequency
Variation vs Clock Frequency
1.8
VS = ± 5V
Q = 5, REFERENCE
CENTER FREQUENCY
1.3 WITH fCLK = 0.5MHz
0.8
MODE 1
0.3
MODE 3
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5
CLOCK FREQUENCY (MHz)
1068 G12
7
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