Datasheet LTC2946 (Analog Devices) - 22

LTC2946
APPLICATIONS INFORMATION
5V 3.3V R4 R5 R6 10k 10k 0.82k R7 R8 R10 0.47k 0.47k 2k SCL VDD LTC2946 SCL SDAI µP MOCD207M SDA GND 2946 F15 SDAO GND 1/2 MOCD207M
Figure 15. Opto-Isolation of a 10kHz I2C Interface Between LTC2946 and Microcontroller
GND RSHUNT 3.3V R4 R5 R6 R7 1k 10k 0.47k 10k INTVCC SDAI VDD VDD LTC2946 VEE µP C2 1/2 MOCD207M 1µF SDA GND GND SDAO SENSE– SENSE+ 1/2 MOCD207M 2946 F16 VEE VOUT RSNS 0.02Ω
Figure 16. Low Speed 10kHz Opto-Isolators Powered from Low Side Shunt Regulator (SCL Omitted for Clarity)
RSNS 0.02Ω 3.3V VIN R4 R5 R6 R7 SENSE+ SENSE– 1k 10k 1k 10k INTVCC SDAI VDD VDD LTC2946-1 µP C2 1/2 MOCD207M 1µF SDAO SDA GND GND 1/2 MOCD207M 2946 F17 RSHUNT
Figure 17. Low Speed 10kHz Opto-Isolators Powered from High Side Shunt Regulator (SCL Omitted for Clarity)
2946fa 22 For more information www.linear.com/LTC2946 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts