Maxim Integrated 78M6610+PSU Hardware Design Guidelines - Manual (Page 3)

AN_6610_107 78M6610+PSU Hardware Design Guidelines
Rev. 0 3
2.1 Sensor Connections
The basic connections for a shunt-based system are represented below.
Shunt NEUTRAL
LINE
750
AVN
INPUT
750
AVP
NTC
ATEMP
100
nF
1000
pF
1000
pF
100
nF
750
1000
pF
100
nF
AIP
AIN
1M
1M
100
nF
LOAD
78M6610+PSU
V
3P3
V
3P3
V
3P3
Figure 2: Basic Connection Diagram on Shunt-Based Systems
The 78M6610+PSU makes use of a single 3.3 VDC supply (V
3P3
) that also represents the reference
potential for the following analog inputs:
• AVP/AVN used to measure the line voltage.
• AIP/AIN used to measure the current.
• ATEMP1 and ATEMP2 used to measure external temperature.
Do not tie the ground of the 78M6610+PSU directly to earth ground when using shunts. See
the Safety Precautions section.