LTC1066-1

20

10661fa

FREQUENCY (Hz)

10k

100k

1M

10M

1066-1 TA08b

10

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

–100

1066-1 TA08a

8V

–8V

OUTPUT CLOCK

FEEDTHROUGH

FILTER

8V

2ND ORDER BUTTERWORTH INPUT

ANTI-ALIASING FILTER PROVIDES

–68dB ATTENUATION TO INPUTS AT 2fCLK.

f–3dB = 200kHz

–8V

VOUT

VIN

fCLK

C1

51pF

C2

510pF

20pF

1

2

3

4

5

6

7

8

9

18

17

16

15

14

13

12

11

10

OUT A

–IN A

+IN A

V–

V+

CONNECT 1

FILTEROUT

50/100

CLK

V+

OUT B

+IN B

GND

FILTERIN

COMP 2

CONNECT 2

COMP 1

V–

0.1

µF

0.1

µF

0.1

µF

LTC1066-1

100

Ω

30k

2.49k

2.49k

10k

0.1

µF

1000pF

f–3dB = 2•fCUTOFF

fCUTOFF =

C1 =

C2 =

µF (f–3dB IN Hz)

fCLK

50

C2

10

100

f–3dB

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com

© LINEAR TECHNOLOGY CORPORATION 1994

LT/LT 0905 REV A • PRINTED IN USA

TYPICAL APPLICATIONS

100kHz Elliptic Lowpass Filter with Input Anti-Aliasing and Output Clock Feedthrough Filters

(Not DC Accurate)

Gain vs Frequency

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