LM3S3739 Luminary Micro, Inc, LM3S3739 Datasheet - Page 350

• Manufacturer Part Number: LM3S3739
• Description: Lm3s3739 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Analog-to-Digital Converter (ADC)
13.2.6
13.3
350
Figure 13-4. Differential Sampling Range, V
Internal Temperature Sensor
The internal temperature sensor provides an analog temperature reading as well as a reference
voltage. The voltage at the output terminal SENSO is given by the following equation:
SENSO = 2.7 - ((T + 55) / 75)
This relation is shown in Figure 13-5 on page 350.
Figure 13-5. Internal Temperature Sensor Characteristic
Initialization and Configuration
In order for the ADC module to be used, the PLL must be enabled and using a supported crystal
frequency (see the RCC register). Using unsupported frequencies can cause faulty operation in the
ADC module.
0.75 V
-1.5 V
ADC Conversion Result
0x3FF
0x2FF
0x1FF
- Input Saturation
2.25 V
Preliminary
0.75 V
3.0 V
IN_ODD
= 2.25 V
1.5 V
V
V
IN_EVEN
June 02, 2008