MIKROE-972 mikroElektronika, MIKROE-972 Datasheet - Page 35

• Manufacturer Part Number: MIKROE-972
• Description: Development Boards & Kits - ARM EASYMX PRO v7 ARM STELLARIS CORTEX-M3
• Manufacturer: mikroElektronika

Specifications of MIKROE-972

• Rohs: yes
• Product: Development Boards
• Tool Is For Evaluation Of: LM3S9B95
• Core: ARM Cortex M3
• Interface Type: CAN, I2C, SPI
• Operating Supply Voltage: 7 VAC to 23 VAC, 9 VDC to 32 VDC

EasyMx PRO
LM35 - Analog
Temperature Sensor
The LM35 is a low-cost precision
integrated-circuit temperature sensor,
whose output voltage is linearly
proportional to the Celsius (Centigrade)
temperature. The LM35 thus has an
advantage over linear temperature
sensors calibrated in ° Kelvin, as the
user is not required to subtract a large
constant voltage from its output to
Enabling LM35 Sensor
Figure 21-1:
LM35 not
connected
EasyMx PRO
sensor using PD4 or PD7 microcontroller pins. The selection of either of those
two lines is done using J10 jumper. When placing the sensor in the socket make
sure that half-circle on the board silkscreen markings matches the rounded part
of the LM35 sensor. If you accidentally connect the sensor the other way, it can
be permanently damaged and you might need to replace it with another one.
During the readings of the sensor, make sure that no other device uses the
selected analog line, because it may interfere with the readings.
1
™
v7 for Stellaris
Figure 21-2:
LM35 placed
in socket
v7
2
®
enables you to get analog readings from the LM35
Figure 21-3:
LM35
connected
to PD4 pin
obtain convenient Centigrade scaling.
It has a linear +10.0 mV/°C scale factor
and less than 60 μA current drain. As it
draws only 60 μA from its supply, it has
very low self-heating, less than 0.1°C in
still air. EasyMx PRO™ v7 for Stellaris
enables you to get analog readings
from the LM35 sensor in restricted
temperature
3
range
Figure 21-4:
LM35
connected
to PD7 pin
from
4
+2ºC
to
®
+150ºC. Board provides a
separate socket (TS2) for
the LM35 sensor in TO-92
plastic packaging. Readings
are done with microcontroller
using single analog input line,
which is selected with jumper J10.
Jumper connects the sensor with either
PD4 or PD7 microcontroller pins.
Figure 21-5: LM35 connected to PD4 pin
PD4
PD7
VCC
VOUT
GND
J10
page 35