LTC1066-1_09 datasheet(9/20 Pages) LINER

Part #	LTC1066-1

Description	14-Bit DC Accurate Clock-Tunable, 8th Order Elliptic or Linear Phase Lowpass Filter

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC1066-1

9

10661fa

FILTERIN

CONNECT 1

COMP1

COMP2

CONNECT 2

FILTEROUT

8TH ORDER

SWITCHED-

CAPACITOR

NETWORK

5,18

4,10

15

8

9

6

7

16

17

12

13

11

14

1

3

2

–IN A

+IN A

V+

V–

GND 50/100 CLK

+IN B

PATENT PENDING

LTC1066-1

OUT B

OUT A

CF

RF

11066-1 BD

–

+

HIGH SPEED

OP AMP

–

+

HIGH SPEED

OP AMP

BLOCK DIAGRA

TEST CIRCUIT

1066-1 TC01

NOTE: RC COMPENSATION BETWEEN PINS 11 AND 13 IS

REQUIRED ONLY FOR CLOCK-TUNABLE OPERATION FOR:

50kHz < fCUTOFFs ≤ 100kHz.

THE TEST SPECIFICATIONS FOR:

fCLK = 2MHz, fCUTOFF = 40kHz, AND

fCLK = 4MHz, fCUTOFF = 80kHz

INCLUDE THE EFFECTS OF RC COMPENSATION.

COMPENSATION DOES NOT INFLUECE THE SPECIFICATIONS

FOR:

fCLK = 400kHz, fCUTOFF = 8kHz.

FOR CLOCK-TUNABLE fCUTOFFs FROM 2kHz TO 50kHz

COMPENSATION IS NOT REQUIRED AND THE FILTER’S

PASSBAND PERFORMANCE IS REPRESENTED BY THE

TYPICAL SPECIFICATIONS AT:

fCLK = 400kHz, fCUTOFF = 8kHz.

V +

V+

V –

V +

VOUT

VIN

fCLK

(DUTY CYCLE

= 50%

±10%)

ELLIPTIC

RESPONSE

50:1

LINEAR PHASE

RESPONSE

100:1

1

µF

0.1

µF

15pF

0.1

µF

0.1

µF

10k

1

2

3

4

5

6

7

8

9

18

17

16

15

14

13

12

11

10

20k

20

Ω

30k

LTC1066-1

0.1

µF

20

Ω

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–

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LTC1066-1 Datasheet(PDF) 9 Page - Linear Technology

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