Datasheet

LTC2945
19
2945fa
For more information www.linear.com/LTC2945
applicaTions inForMaTion
Figure 13. Opto-Isolation of a 10kHz I
2
C Interface Between LTC2945 and Microcontroller (SCL Omitted for Clarity)
Figure 14. Low Speed 10kHz Opto-Isolators Powered from Low-Side Shunt Regulator
Figure 15. 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
V
DD
2945 F13
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
V
DD
R
SHUNT
2945 F14
R
SNS
0.02Ω
SENSE
–
SENSE
+
INTV
CC
V
DD
C1
1µF
V
OUT
V
EE
V
EE
LTC2945-1
SDAI
SDAO
GND
3.3V
GND
SDA
µP
1/2 MOCD207M
1/2 MOCD207M
R3
1k
R1
10k
R2
1k
R4
10k
V
DD
R
SHUNT
V
OUT
V
IN
2945 F15
R
SNS
0.02Ω
SENSE
+
SENSE
–
INTV
CC
V
DD
C1
1µF