LTC6909IMS Просмотр технического описания (PDF) - Linear Technology

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LTC6909IMS

1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation

Linear Technology 

LTC6909

TYPICAL APPLICATIONS

Using Additional Standard Logic Inverters to Achieve 10- and 14-Phase Outputs

(Inverters Are 74HC04 or Equivalent)

10 OUTPUT PHASES (OUTPUTS SHIFTED BY 36 DEGREES)

V+

0.1μF

0.1μF

RSET

LTC6909

V+D

OUT1

GND OUT2

V+A

OUT3

SET

OUT4

PH0 OUT5

PH1 OUT6

PH2 OUT7

MOD OUT8

0° (360°)

180°

72°

252°

144°

324°

216°

36°

288°

108°

14 OUTPUT PHASES (OUTPUTS SHIFTED BY 25.71 DEGREES)

V+

0.1μF

0.1μF

RSET

LTC6909

V+D

OUT1

GND OUT2

V+A

OUT3

SET

OUT4

PH0 OUT5

PH1 OUT6

PH2 OUT7

MOD OUT8

0° (360°)

180°

51.43°

231.43°

102.86°

282.86°

154.29°

334.29°

205.71°

25.71°

257.14°

77.14°

308.57°

128.57°

6909 TA03

Combining Eight Outputs With a Lowpass Filter to Create a Sine Wave

2.7V TO 5.5V

249k

0.1μF

787k

402k

140k

80.6k

1 V+A

SET 16

2 GND

PH2 15

3 PH0 LTC6909 MOD 14

4 PH1

V+D 13

0.1μF

5

12

787k

OUT1

OUT8

6

OUT2

11 402k

OUT7

7

OUT3

10 140k

OUT6

8

OUT4

9 80.6k

OUT5

500mV/DIV

V+ = 5V

THD = 0.2%

2μs/DIV

6909 TA06

1 LP

V+ 16

21k

0.1μF

OPEN

2 SA LTC1563-2 LPB 15

3

NC

NC 14

4

INVA

INVB 13

5

NC

NC 12

6

LPA

SB 11

7 AGND

NC 10

8 V–

EN 9

0.1μF

16.2k

20k

100kHz

SINE WAVE

OUTPUT

16.2k

6909 TA04

18

6909f

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