LTC1065CSW datasheet(11/16 Pages) AD

Part #	LTC1065CSW

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

PDF	16 Pages

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Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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11 / 16 page

LTC1065

1065fb

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

0.9995 fCLK

0.0005 fCLK

– 0.01 dB

0.995 fCLK

0.005 fCLK

– 0.98 dB

0.99

fCLK

0.01

fCLK

–3.13 dB

0.9875 fCLK

0.0125 fCLK

– 4.79 dB

0.985 fCLK

0.015 fCLK

– 7.21 dB

0.9825 fCLK

0.0175 fCLK

– 10.43 dB

0.98

fCLK

0.02

fCLK

– 14.14 dB

0.975 fCLK

0.025 fCLK

– 21.84 dB

0.97

fCLK

0.03

fCLK

– 28.98 dB

0.965 fCLK

0.035 fCLK

– 35.31 dB

0.96

fCLK

0.04

fCLK

– 40.94 dB

0.955 fCLK

0.045 fCLK

– 45.96 dB

0.95

fCLK

0.05

fCLK

– 50.46 dB

0.94

fCLK

0.06

fCLK

– 58.29 dB

0.93

fCLK

0.07

fCLK

– 64.90 dB

0.9

fCLK

0.1

fCLK

– 80.20 dB

OUTPUT AMPLITUDE

REFERENCED TO

INPUT SIGNAL

VIN

VOUT

1065 F10

V–

V+

0.1

µF

LTC1065

0.1

µF

fCLK

πRC

≤

fCLK

Figure 10. Adding an Input Anti-Aliasing RC

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