LTC1068 Linear Technology, LTC1068 Datasheet - Page 7

• Manufacturer Part Number: LTC1068
• Description: Clock-Tunable/ Quad Second Order/ Filter Building Blocks
• Manufacturer: Linear Technology

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