LTC2974 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC2974

Wide Range I²C Power Monitor

Linear Technology 

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LTC2945

APPLICATIONS INFORMATION

48V

SDAI

R4 R5

20k 7.5k

LTC2945-1

SDAO

GND

3.3V

R6

R7

0.51k 10k

VDD

1/2 MOCD207M

μP

SDA

GND

1/2 MOCD207M

2945 F16

Figure 16. Opto-Isolation of a 1.5kHz I2C Interface Between LTC2945-1 and Microcontroller (SCL Omitted for Clarity)

5V

SDAI

R4 R5

10k 0.82k

LTC2945

SDAO

GND

3.3V

R6

R7

0.51k 10k

VDD

1/2 MOCD207M

1/2 MOCD207M

μP

SDA

GND

2945 F17

Figure 17. Opto-Isolation of I2C Interface with Low Power, High Speed Opto-couplers (SCL Omitted for Clarity)

RSNS

VIN

TO

LOAD

1

12

2

11

3

10

4

9

5

8

6

7

2945 F18

Figure 18. Recommended Layout for Kelvin Connection

2945f

19

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