LTC1065MJ8 Ver la hoja de datos (PDF) - Linear Technology

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LTC1065MJ8

DC Accurate, Clock-Tunable Linear Phase 5th Order Bessel Lowpass Filter

Linear Technology 

APPLICATI S I FOR ATIO

Table 4. Aliasing Data

INPUT FREQUENCY

0.9995 fCLK

0.995 fCLK

0.99 fCLK

0.9875 fCLK

0.985 fCLK

0.9825 fCLK

0.98 fCLK

0.975 fCLK

0.97 fCLK

0.965 fCLK

0.96 fCLK

0.955 fCLK

0.95 fCLK

0.94 fCLK

0.93 fCLK

0.9 fCLK

OUTPUT FREQUENCY

0.0005 fCLK

0.005 fCLK

0.01 fCLK

0.0125 fCLK

0.015 fCLK

0.0175 fCLK

0.02 fCLK

0.025 fCLK

0.03 fCLK

0.035 fCLK

0.04 fCLK

0.045 fCLK

0.05 fCLK

0.06 fCLK

0.07 fCLK

0.1 fCLK

OUTPUT AMPLITUDE

REFERENCED TO

INPUT SIGNAL

– 0.01 dB

– 0.98 dB

– 3.13 dB

– 4.79 dB

– 7.21 dB

– 10.43 dB

– 14.14 dB

– 21.84 dB

– 28.98 dB

– 35.31 dB

– 40.94 dB

– 45.96 dB

– 50.46 dB

– 58.29 dB

– 64.90 dB

– 80.20 dB

LTC1065

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.

R

VIN

V–

1

C

2

3

0.1µF 4

LTC1065

8

7

VOUT

6

5 fCLK

fCLK

20

≤

1

2πRC

≤

fCLK

10

V+

0.1µF

1065 F10

Figure 10. Adding an Input Anti-Aliasing RC

1065fb

11

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