https://www.lairdconnect.com/wireless-
modules/bluetooth-modules
27
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digital pin (DIO) must be configured as AIN analogue input (ADC). To configure the SIO_03 pin from DIO pin to Alternate
function AIN, see the example file
ts.temperature.sensor.sb
in the GitHub
smart
BASIC sample applications repository on the
BL654PA product page at
https://github.com/LairdCP/BL654PA-Applications
Key specifications of the LM20BIM7 are as follows in
Table 9: LM20BIM7 Specifications
Output type
Analogue output
Accuracy at 30ºC
±1.5ºC ±4ºC (max)
Accuracy at 40ºC to +85ºC
approx. ±2.5ºC ±5ºC (max)
Power supply voltage range
+2.4 V to 5.5 V
Current Drain
10 uA (max)
Output impedance
160 Ohms (max)
The LM20BIM7 datasheet states the relationship of Temperature (T) to Voltage output (Vo) can be approximated as a linear
equation (for temperature range of -40ºC to +85ºC):
Vo(mV) = -11.67mV/ºC x T + 1858.3
gives the following calculated Vo versus temperature:
Table 10: LM20BIM7 Temperature to Voltage Output relationship
Temperature (T)
Typical Voltage
+80ºC
+924.7mV
+70ºC
+1041.4mV
+60ºC
+1158.1mV
+50ºC
+1274.8mV
+40ºC
+1391.5mV
+30ºC
+1508.2mV
+20ºC
+1624.9mV
+10ºC
+1741.6mV
+0ºC
+1858.2mV
-10ºC
+1975.0mV
-20ºC
+2091.7mV
-30ºC
+2208.4mV
Summary of Contents for 455-00022
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