LTC1569CS8-6 Ver la hoja de datos (PDF) - Linear Technology

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Fabricante

LTC1569CS8-6

Linear Phase, DC Accurate, Low Power, 10th Order Lowpass Filter

Linear Technology 

LTC1569-6

APPLICATIONS INFORMATION

quency. The LTC1569-6 samples the input signal twice

every clock period. Therefore, the sampling frequency is

twice the clock frequency and 128 times the filter cutoff

frequency. Input signals with frequencies near 2 • fCLK

± fCUTOFF will be aliased to the passband of the filter and

appear at the output unattenuated.

IN– 2

+

IN+ – GND

–

i=

125k

–

125k

+

125k

IN+ 1

–

GND 3

+

Figure 8

8 OUT

1569-6 F06

488

244

0

–244

VS = 5V

REXT = 10k

TA = 25°C

–488

–1.5 –1.0 –0.5 0 0.5

VIN DC (V)

Figure 9

1.0 1.5

1569-6 F09

TYPICAL APPLICATIO S

Single 3V Operation, AC Coupled Input,

64kHz Cutoff Frequency

VIN

3V

3.48k

2k

0.1µF

1 IN+

OUT

2 IN–

V+

LTC1569-6

3 GND

RX

1µF

4 V–

DIV/CLK

8 VOUT

7 REXT = 10k

6

5

( )( ) 64kHz

fCUTOFF =

n=1

10k

REXT

n = 1, 4, 16 FOR PIN 5 AT

GROUND, OPEN, V+

3V

1µF

1569-6 TA02

Single 3V, AC Coupled Input,

64kHz Cutoff Frequency

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

0

32µs

28µs

24µs

0 10k 20k 30k 40k 50k 60k 70k

40k 50k 60k 70k 80k 90k 100k 110k 120k 130k 140k 150k

FREQUENCY (Hz)

1569-6 TA02a

10

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