A/D Interface; Power Supply A/D; Temperature A/D - Motorola G24 Developer's Manual

A/D Interface

A/D Interface
The G24 includes 5 Analog to Digital Converter (ADC) signals with 10-bit resolution, for
environmental and electrical measurements. The ADC signals accept an analog DC voltage level
on their inputs and convert it to a 10-bit digital value for further processing by G24 or the user
application.

Power Supply A/D

The main power supply (VCC) is sampled internally by the G24 A/D interface through a
dedicated input, which is not accessible on the interface connector.
The G24 constantly monitors the power supply for any low or high voltage occurrences.
Table 2-17

Temperature A/D

The G24 incorporates an internal temperature sensor circuit, which is used to monitor the
operating (ambient) temperature. The temperature sensor is not accessible at the interface
connector. The operating temperature is constantly monitored by G24 through a dedicated A/D
signal. The temperature sensor is located near the RF power amplifier, which is the largest source
of heat during transmissions.
Table 2-18
42
gives the supply A/D specifications.
Table 2-17: Supply A/D Specifications
Parameter Conditions
Supply Range Operating range
Supply Limits Shutdown detec-
tion limits
Resolution
gives the temperature A/D specifications.
Table 2-18: Temperature A/D Specifications
Parameter Conditions
Temperature Operating range
Range
Tolerance
Temperature Shutdown detec-
Limits tion limits
Resolution
Module Hardware Description
Min Typ Max Unit
2.5 4.65 V
3.0 4.5 V
10 mV
Min Typ Max Unit
-45 120 °C
5 %
-40 85 °C
1 °C
January 1, 2006