S9S08SG8E2VTG Freescale Semiconductor, S9S08SG8E2VTG Datasheet - Page 125

• Manufacturer Part Number: S9S08SG8E2VTG
• Description: 8-bit Microcontrollers - MCU 9S08 UC W/ 8K 0.25UM SGF
• Manufacturer: Freescale Semiconductor

Specifications of S9S08SG8E2VTG

• Rohs: yes
• Core: S08
• Processor Series: MC9S08SG8
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 40 MHz
• Program Memory Size: 8 KB
• Data Ram Size: 8 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 2.7 V to 5.5 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: TSSOP-16
• Mounting Style: SMD/SMT
• A/d Bit Size: 10 bit
• A/d Channels Available: 12
• Interface Type: SCI, SPI
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 16
• Number Of Timers: 2
• Program Memory Type: Flash
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 2.7 V

For temperature calculations, use the V
In application code, the user reads the temperature sensor channel, calculates V
V
less than V
bandgap voltage reference and temperature sensor.
Calibrating at 25C will improve accuracy to
Calibration at 3 points, -40C, 25C, and 125C will improve accuracy to  2.5C. Once calibration has
been completed, the user will need to calculate the slope for both hot and cold. In application code, the
user would then calculate the temperature using
temperature is above or below 25C. Once determined if the temperature is above or below 25C, the user
can recalculate the temperature using the hot or cold slope value obtained during calibration.
Figure 9-1
Freescale Semiconductor
TEMP25
. If V
TEMP25
shows the MC9S08SG8 block diagram with the ADC module highlighted.
TEMP
, the hot slope value is applied in
is greater than V
MC9S08SG8 MCU Series Data Sheet, Rev. 7
TEMP25
TEMP25
, the cold slope value is applied in

and m values from the ADC Electricals table.
4.5C.
Equation 9-1
Equation
9-1. To improve accuracy , calibrate the
as detailed above and then determine if the
Chapter 9 Analog-to-Digital Converter (S08ADCV1)
Equation
TEMP
, and compares to
9-1. If V
TEMP
121
is