11

LTC1063

S

APPLICATI

I FOR ATIO

Group Delay

The group delay of the LTC1063 closely approximates the

delay of an ideal 5-pole Butterworth lowpass filter (Figure

11, Curve A). To linearize the group delay of the LTC1063

(Figure 11, Curve B), use an input resistor about six times

The passband response of the group delay corrected filter

approximates a 5-pole Bessel response while its transi-

tion band rolls off like a Butterworth.

Figure 11. Group Delay

S

APPLICATI

TYPICAL

±7.5 Supply Operation

Sharing Clock for Multichannel Applications

–5V

R

5V

0.1

µF

1063 TA05

1

2

3

4

8

7

6

5

LTC1063

C

1

2

3

4

8

7

6

5

LTC1063

–5V

5V

0.1

µF

0.1

µF

0.1

µF

–5V

R

5V

0.1

µF

1063 TA04

1

2

3

4

8

7

6

5

LTC1063

C

1

2

3

4

8

7

6

5

LTC1063

–5V

5V

0.1

µF

0.1

µF

0.1

µF

WIDEBAND NOISE = 140

Cascading Two LTC1063s for Steeper Roll-Off

INPUT FREQUENCY (kHz)

0

100

90

80

70

60

50

40

30

20

8

1063 F10

2

4

6

10

(A) LTC1063

BUTTERWORTH

1

35

79

(B) GROUP

DELAY

CORRECTED

–7.5V

7.5V

0.1

µF

1

2

3

4

8

7

6

5

LTC1063

0.1

µF

7.5V

1

µF

TANT

+

1063 TA07

10k

≅2.5mV

LT1009

10k

*

* OPTIONAL, 1N4148

5V

13k

5V

0.1

µF

1063 TA03

0.1

µF

200pF

1

2

3

4

8

7

6

5

LTC1063

4.53k

+

4.99k

1

µF

TANT

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.