LTC2945

19

Rev. C

For more information www.analog.com

APPLICATIONS INFORMATION

Figure 14. Opto-Isolation of a 10kHz I2C Interface Between LTC2945 and Microcontroller (SCL Omitted for Clarity)

Figure 15. Low Speed 10kHz Opto-Isolators Powered from Low-Side Shunt Regulator

Figure 16. Low Speed 10kHz Opto-Isolators Powered from High-Side Shunt Regulator

LTC2945

SDAI

SDAO

GND

3.3V

GND

SDA

µP

1/2 MOCD207M

1/2 MOCD207M

5V

R4

10k

R5

0.82k

R6

0.51k

R7

10k

VDD

2945 F14

LTC2945

SDAI

SDAO

GND

GND

3.3V

GND

SDA

µP

1/2 MOCD207M

1/2 MOCD207M

R3

1k

R1

10k

R2

0.51k

R4

10k

VDD

RSHUNT

2945 F15

RSNS

0.02

SENSE–

SENSE+

INTVCC

VDD

C1

1µF

VOUT

VEE

VEE

LTC2945-1

SDAI

SDAO

GND

3.3V

GND

SDA

µP

1/2 MOCD207M

1/2 MOCD207M

R3

1k

R1

10k

R2

1k

R4

10k

VDD

RSHUNT

VOUT

VIN

2945 F16

RSNS

0.02

SENSE+

SENSE–

INTVCC

VDD

C1

1µF