LTC1068-200CG datasheet(7/30 Pages) LINER

Part #	LTC1068-200CG

Description	Clock-Tunable, Quad Second Order, Filter Building Blocks

Download	30 Pages

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC1068 Series

7

1068fc

ELECTRICAL CHARACTERISTICS

LTC1068

Maximum Q vs Center Frequency

(Modes 1, 1b, 2)

LTC1068

Maximum Q vs Center Frequency

(Modes 2, 3)

LTC1068-200

Maximum Q vs Center Frequency

(Modes 1, 1b, 2)

Table 1. Output DC Offsets One 2nd Order Section

MODE

VOSN

VOSBP VOSLP

1

VOS1[(1/Q) + 1 + ||HOLP||] – VOS3/Q

VOS3

VOSN – VOS2

1b

VOS1[(1/Q) + 1 + R2/R1] – VOS3/Q

VOS3

~(VOSN – VOS2)(1 + R5/R6)

2

[VOS1(1 + R2/R1 + R2/R3 + R2/R4) – VOS3(R2/R3)X

[R4/(R2 + R4)] + VOS2[R2/(R2 + R4)]

VOS3

VOSN – VOS2

3

VOS2

VOS3

VOS1[1 + R4/R1 + R4/R2 + R4/R3] – VOS2(R4/R2) – VOS3(R4/R3)

TYPICAL PERFORMANCE CHARACTERISTICS

CENTER FREQUENCY, fO (kHz)

0

A

B

C

0

5

15

20

25

50

35

20

40

50

1068 G01

10

40

45

30

10

30

60

70

A. VS = 3.3V, fCLK(MAX) = 1.5MHz

B. VS = 5V, fCLK(MAX) = 3.4MHz

C. VS = ±5V, fCLK(MAX) = 5.6MHz

(FOR MODE 2 R4 ≥ 10R2)

CENTER FREQUENCY, fO (kHz)

0

A

B

C

0

5

15

20

25

50

35

20

40

50

1068 G02

10

40

45

30

10

30

60

A. VS = 3.3V, fCLK(MAX) = 1MHz

B. VS = 5V, fCLK(MAX) = 3MHz

C. VS = ±5V, fCLK(MAX) = 5MHz

(FOR MODE 2 R4 < 10R2)

CENTER FREQUENCY, fO (kHz)

0

A

B

C

55

50

45

40

35

30

25

20

15

10

5

0

8

16

20

24

1068 G03

4

12

28 32

A: VS = 3.3V, fCLK(MAX) = 1.2MHz

B: VS = 5V, fCLK(MAX) = 3.2MHz

C: VS = ±5V, fCLK(MAX) = 6.1MHz

(FOR MODE 2, R4 ≥ 10R2)

LTC1068-200

Maximum Q vs Center Frequency

(Modes 2, 3)

LTC1068-50

Maximum Q vs Center Frequency

(Modes 1, 1b, 2)

LTC1068-50

Maximum Q vs Center Frequency

(Modes 2, 3)

CENTER FREQUENCY, fO (kHz)

0

A

B

C

55

50

45

40

35

30

25

20

15

10

5

0

8

16

20

24

1068 G04

4

12

28 32

A: VS = 3.3V, fCLK(MAX) = 1.2MHz

B: VS = 5V, fCLK(MAX) = 3.2MHz

C: VS = ±5V, fCLK(MAX) = 6.1MHz

(FOR MODE 2, R4 < 10R2)

CENTER FREQUENCY, fO (kHz)

0

A

B

C

55

50

45

40

35

30

25

20

15

10

5

0

8

16

20

24

1068 G05

4

12

28 32

A: VS = 3.3V, fCLK(MAX) = 1.1MHz

B: VS = 5V, fCLK(MAX) = 2.1MHz

C: VS = ±5V, fCLK(MAX) = 3.6MHz

(FOR MODE 2, R4 ≥ 10R2)

CENTER FREQUENCY, fO (kHz)

0

A

B

C

55

50

45

40

35

30

25

20

15

10

5

0

8

16

20

24

1068 G06

4

12

28 32

A: VS = 3.3V, fCLK(MAX) = 1.1MHz

B: VS = 5V, fCLK(MAX) = 2.1MHz

C: VS = ±5V, fCLK(MAX) = 3.6MHz

(FOR MODE 2, R4 < 10R2)

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LTC1068-200CG Datasheet(PDF) 7 Page - Linear Technology

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