CHAMP-AV8 (VPX6-462) HARDWARE USER’S MANUAL CURTISS-WRIGHT
1-22 PROPRIETARY 826448 VERSION 5 MARCH 2015
VOLTAGE, CURRENT, AND TEMPERATURE SENSORS
The CHAMP-AV8 is equipped with a suite of voltage, current, and temperature sensors that
provide users with visibility into the environmental conditions encountered by the board. The
CHAMP-AV8 features current and voltage sensors for the backplane power rails, enabling the
user to measure the instantaneous voltage input and current draw of the entire board. The
current drawn by any installed mezzanine module is included in the current measurements.
Since the power consumption of the board depends on many factors including the processor
clock frequency, the nature of the software, SDRAM loading, and the operating temperature
of the board, the ability to measure the actual power for a given application eliminates
guesswork in system power consumption estimates.
The CHAMP-AV8 also provides a number of temperature sensors. There are sensors for the
edges and center of the board, and the processor die. Figure 1.10 (below) and Figure 1.11 on
page 1-23 show the locations of the card edge and board center temperature sensors provided
on the top and bottom of the CHAMP-AV8 board. The usage of these sensors is described in
the BSP manuals. The internal temperature sensor monitoring channels are realized through
the use of embedded sensors inside of ADT7461 sensing devices. The external temperature
sensor channels are implemented by connecting remote transistors to the external
temperature monitoring channels of the ADT7461s.
Figure 1.10: Location of Voltage, Current, and Temperature Sensors (Primary Side)
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