LTC1061

14

1061fe

–

+

1061 F23

+

–

VOS2

VOS1

Σ

(12,18)

3

5

+

–

–

+

VOS3

2

+

–

–

+

1

6

(13,19)

(14,20)

(11,17)

+

–

4

ODES OF OPERATIO

NOTCH/HP

BP

LP

VS (±V)

fCLK/fO

(

µVRMS)(µVRMS)(µVRMS)

CONDITIONS

5.0

50:1

45

55

70

Mode 1, R1 = R2 = R3

5.0

100:1

65

65

85

Q = 1

2.5

50:1

30

30

45

2.5

100:1

40

40

60

5.0

50:1

18

150

150

Mode 1, Q = 10

5.0

100:1

20

200

200

R1 = R3 for BP Out

2.5

50:1

15

100

100

R1 = R2 for LP Out

2.5

100:1

17

140

140

5.0

50:1

57

57

62

Mode 3, R1 = R2 = R3 = R4

5.0

100:1

72

72

80

Q = 1

2.5

50:1

40

40

42

2.5

100:1

50

50

53

5.0

50:1

135

120

140

Mode 3, R2 = R4, Q = 10

5.0

100:1

170

160

185

R3 = R1 for BP Out

2.5

50:1

100

88

100

R4 = R1 for LP and HP Out

2.5

100:1

125

115

130

Table 3. Wideband RMS Noise

Figure 23. Equivalent Input Offsets of 1/3 LTC1061 Filter Building Block

VOSN

VOSBP

VOSLP

MODE

PIN 3 (18)

PIN 2 (19)

PIN 1 (20)

1VOS1 [(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)] ×

VOS3

VOSN – VOS2

× [R4/(R2 + R4)] + VOS2[R2/(R2 + R4)]

3VOS2

VOS3

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

– VOS3 (R4/R3)

Table 4