UG-1163
ADZS-U4050LF-EZKIT
User Guide
Rev. 0 | Page 8 of 31
On-Board Trisensor Circuit (Accelerometer, Temperature, and ADC)
The ADZS-U4050LF-EZKIT board has an on-board trisensor
circuit consisting of a 3-axis micro electromechanical systems
(MEMS) accelerometer, a temperature sensor, and an ADC,
which is provided by the
ADXL363
(U2), shown in Figure 6.
The entire system consumes less than 2 μA at a 100 Hz output
data rate and 270 nA that, when in motion, triggers the wake-
up mode. The
ADXL363
communicates with the
ADuCM4050
microcontroller via the serial port interface (SPI2). The accel-
erometer provides selectable measurements of 2G, 4G, and 8G
with a resolution of 1 mG per least significant bit (LSB) on the 2G
range. The temperature sensor operates with a scale factor of
0.065°C. The ADC has no external connections, but can be used
by tapping to the TP8 test point.
This circuit can be powered down by unshorting the JP6 header.
1
6076-
006
Figure 6. Trisensor Circuit
