LTC6990 Ver la hoja de datos (PDF) - Analog Devices

Número de pieza

componentes Descripción

fabricante

LTC6990

TimerBlox: Voltage Controlled Silicon Oscillator

Analog Devices 

LTC6990

TYPICAL APPLICATIONS

Programming NDIV Using an 8-Bit DAC

OE

OUT

LTC6990

GND

V+

SET

DIV

RSET

619k

2.25V TO 5.5V

C1

0.1µF

C2

0.1µF

VCC

SDI

VOUT LTC2630-LZ8 SCK

CS/LD

GND

µP

6990 TA02

DIVCODE

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

DAC CODE

0

24

40

56

72

88

104

120

136

152

168

184

200

216

232

255

Full Range VCO with Any NDIV Setting (fMAX to fMIN for VIN = 0V to VSET)

VIN

0V TO 1V

RVCO1

26.1k

RVCO2

26.1k

5V

–

LT1490

+

5V

D1

IN4148

OE

OUT

LTC6990

GND

V+

SET

DIV

6990 TA03

C1

0.1µF

5V

R1

R2

RSET

826k

22

Full Range VCO with Any NDIV Setting (Positive Frequency Control, fMIN to fMAX for VIN = 0V to VSET

R3

VIN

10k

0V TO 1V

R4

10k

5V

–

LT1490

+

5V

RVCO

53.6k

OE

OUT

LTC6990

GND

V+

SET

RSET1

412k

DIV

6990 TA04

RSET2

412k

C1

0.1µF

5V

R1

R2

For more information www.analog.com

Rev. D

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