11

LTC1065

S

APPLICATI

I FOR ATIO

An input RC can be used to attenuate incoming signals

close to the filter clock frequency (Figure 10). A Bessel

passband response will be maintained if the value of the

input resistor follows Table 1.

Table 4. Aliasing Data

INPUT FREQUENCY

OUTPUT FREQUENCY

– 0.01 dB

– 0.98 dB

0.99

0.01

– 3.13 dB

– 4.79 dB

– 7.21 dB

– 10.43 dB

0.98

0.02

– 14.14 dB

– 21.84 dB

0.97

0.03

– 28.98 dB

– 35.31 dB

0.96

0.04

– 40.94 dB

– 45.96 dB

0.95

0.05

– 50.46 dB

0.94

0.06

– 58.29 dB

0.93

0.07

– 64.90 dB

0.9

0.1

– 80.20 dB

OUTPUT AMPLITUDE

REFERENCED TO

INPUT SIGNAL

S

APPLICATI

TYPICAL

Cascading Two LTC1065s for Steeper Roll-Off

Sharing Clock for Multichannel Applications

1065 F10

C

R

0.1

µF

1

2

3

4

8

7

6

5

LTC1065

0.1

µF

20

10

2

πRC

≤≤

1

Figure 10. Adding an Input Anti-Aliasing RC

–5V

R

5V

0.1

µF

1065 TA04

1

2

3

4

8

7

6

5

LTC1065

C

1

2

3

4

8

7

6

5

LTC1065

–5V

5V

0.1

µF

0.1

µF

0.1

µF

WIDEBAND NOISE = 110

–5V

R

5V

0.1

µF

1065 TA05

1

2

3

4

8

7

6

5

LTC1065

C

1

2

3

4

8

7

6

5

LTC1065

–5V

5V

0.1

µF

0.1

µF

0.1

µF

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.