LTC4260 View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LTC4260

Wide Range I²C Power Monitor

Linear Technology 

LTC2945

APPLICATIONS INFORMATION

VIN

48V C1

1μF

VDD

INTVCC

LTC2945-1

SDAO

SDAI

GND

C2

1μF

1/2 ACPL-064L*

R5

2k

VCC

3.3V

GND

VCC

GND

1/2 ACPL-064L*

* CMOS OUTPUT

M1

BS170

R6 R7

2k 2k

VDD

ISO_SDA

μP

SDA

GND

2945 F13

Figure 13. Opto-Isolation of a 10kHz I2C Interface Between LTC2945 and Microcontroller (SCL Omitted for Clarity)

GND

RSHUNT

3.3V

INTVCC

SDAI

VDD

LTC2945

C1

1μF

R3 R1

1k 10k

VEE

GND

SENSE–

SDAO

SENSE+

VEE

VOUT

RSNS

0.02Ω

R2

R4

0.51k 10k

VDD

1/2 MOCD207M

μP

SDA

GND

1/2 MOCD207M

2945 F14

Figure 14. Low Speed 10kHz Opto-Isolators Powered from Low-Side Shunt Regulator

VOUT

RSNS

0.02Ω

SENSE+

INTVCC

SENSE–

SDAI

VDD

LTC2945-1

C1

1μF

SDAO

VOUT

R3 R1

1k 10k

GND

RSHUNT

3.3V

R2 R4

1k 10k

VDD

1/2 MOCD207M

μP

SDA

GND

1/2 MOCD207M

2945 F15

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

2945f

18

Share Link: