LTC1068 Просмотр технического описания (PDF) - Linear Technology
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LTC1068 Datasheet PDF : 30 Pages
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LTC1068 Series
ELECTRICAL CHARACTERISTICS
Table 1. Output DC Offsets One 2nd Order Section
MODE VOSN
1
VOS1[(1/Q) + 1 + ||HOLP||] – VOS3/Q
1b
VOS1[(1/Q) + 1 + R2/R1] – VOS3/Q
2
[VOS1(1 + R2/R1 + R2/R3 + R2/R4) – VOS3(R2/R3)X
[R4/(R2 + R4)] + VOS2[R2/(R2 + R4)]
3
VOS2
VOSBP
VOS3
VOS3
VOS3
VOSLP
VOSN – VOS2
~(VOSN – VOS2)(1 + R5/R6)
VOSN – VOS2
VOS3 VOS1[1 + R4/R1 + R4/R2 + R4/R3] – VOS2(R4/R2) – VOS3(R4/R3)
TYPICAL PERFORMANCE CHARACTERISTICS
LTC1068
Maximum Q vs Center Frequency
(Modes 1, 1b, 2)
50
45
A. VS = 3.3V, fCLK(MAX) = 1.5MHz
B. VS = 5V, fCLK(MAX) = 3.4MHz
40
C. VS = ±5V, fCLK(MAX) = 5.6MHz
(FOR MODE 2 R4 ≥ 10R2)
35
30
25
20
15
10
5
A
B
C
0
0 10 20 30 40 50 60 70
CENTER FREQUENCY, fO (kHz) 1068 G01
LTC1068
Maximum Q vs Center Frequency
(Modes 2, 3)
50
45
A. VS = 3.3V, fCLK(MAX) = 1MHz
B. VS = 5V, fCLK(MAX) = 3MHz
40
C. VS = ±5V, fCLK(MAX) = 5MHz
(FOR MODE 2 R4 < 10R2)
35
30
25
20
15
10
5
A
B
C
0
0 10 20 30 40 50 60
CENTER FREQUENCY, fO (kHz) 1068 G02
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
LTC1068-50
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
LTC1068-200
Maximum Q vs Center Frequency
(Modes 1, 1b, 2)
55
50
A: VS = 3.3V, fCLK(MAX) = 1.2MHz
B: VS = 5V, fCLK(MAX) = 3.2MHz
45
C: VS = ±5V, fCLK(MAX) = 6.1MHz
40
(FOR MODE 2, R4 ≥ 10R2)
35
30
25
20
15
10
A
BC
5
0
0 4 8 12 16 20 24 28 32
CENTER FREQUENCY, fO (kHz) 1068 G03
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
1068fc
7
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