sames
FEATURES
n Performs power measurement and di-
rectly drives a 5 digit (7 segment) LED
display
n Accuracy better than 1% (± 1 count)
n Protected against ESD
n Total power consumption rating below
800mW
1/10
n Uses a shunt resistor or for current
sensing
n Operates over a wide temperature
range
n Precision voltage reference on-chip
SINGLE PHASE WATT MEASUREMENT MODULE
WITH A 5 DIGIT LED DISPLAY
4358 PDS038-SA9106-001 REV. A 06-09-1995
SA9106 APPLICATION NOTE
PM9106AP
DESCRIPTION
The SAMES single phase Watt measurement module, the PM9106AP includes an on-
board 5 digit (7 segment) Light Emitting Diode (LED) display. Active power is directly
displayed in watts, with a full scale of 20 000 watts.
The measured power is updated approximately every 2 seconds, giving an average
power reading for this period.
This method of calculation takes the power factor into account.
This innovative universal Watt measurement module is ideally suited for the display of
the measured power in single phase, industrial and domestic power measurement
applications.
The application utlises the SAMES SA9106AP single phase Watt measurement
integrated circuit for power measurement and display.
As a safety measure, this application shows the current sensor connected to the neutral
line. In practice, the live line may be used for current sensing, provided that the supply
connections (MAINS) are reversed on the module.
