User's Manual

LE920A4 HW User Guide Miscellaneous Functions
Doc#: 1VV0301261 ADC Converter
Rev. 4.3 Page 95 of 123 2017-12-07
ADC Converter
9.4.1. Description
The module provides three 8-bit Analog to Digital converters. Each ADC reads the voltage
level applied on the relevant pin, converts it, and stores it into an 8-bit word.
Table 44 shows the ADC characteristics.
Table 44: ADC Parameters
Min Max Units
Input voltage range 0.1 1.7 Volt
AD conversion - 8 bits
Resolution - 7 mV
9.4.2. Using ADC Converter
An AT command is available to use the ADC function.
The command is AT#ADC=1,2. The read value is expressed in mV.
Refer to Ref 1: LE920A4 AT Command User Guide for the full description of this function.
Using the Temperature Monitor Function
The Temperature Monitor permits to control the module’s internal temperature and, if
properly set (see the #TEMPMON command in Ref 1: LE920A4 AT Command User
Guide), raises a GPIO to High Logic level when the maximum temperature is reached.
Fuel Gauge (optional)
The module can optionally support an external Fuel Gauge solution.
In this case, an external IC that is capable of measuring the current flow in and out of the
module must be added on the carrier board.
Figure 23 shows an example of a typical connectivity of such an external fuel gauge to the
module.
Detailed design - TBD