ATA6616-P3PW Atmel, ATA6616-P3PW Datasheet - Page 227

• Manufacturer Part Number: ATA6616-P3PW
• Description: TXRX MULTICHIP MOD LIN SIP 38QFN
• Manufacturer: Atmel
• Series: AVR® ATA66 LIN-SBCr

Specifications of ATA6616-P3PW

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, LIN, SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 16
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 38-VQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.18.9
4.18.10
9132D–AUTO–12/10
Temperature Measurement
Manufacturing Calibration
The temperature measurement is based on an on-chip temperature sensor that is coupled to a
single ended ADC input. MUX[4..0] bits in ADMUX register enables the temperature sensor.
The internal 1.1V voltage reference must also be selected for the ADC voltage reference
source in the temperature sensor measurement. When the temperature sensor is enabled, the
ADC converter can be used in single conversion mode to measure the voltage over the tem-
perature sensor.
The measured voltage has a linear relationship to the temperature as described in
The voltage sensitivity is approximately 1LSB/
surement is ±10°C using manufacturing calibration values (TS_GAIN, TS_OFFSET). The
values described in
temperature sensor output varies from one chip to another.
Table 4-56.
Calibration values determined during test are available in the signature row.
The temperature in degrees Celsius can be calculated using the formula:
Where:
T
=
Temperature/°C
------------------------------------------------------------------------------------------------------------------------------------------------------ -
a. ADCH & ADCL are the ADC data registers,
b. is the temperature sensor gain
c. TSOFFSET is the temperature sensor offset correction term
ADCH 8
TS_GAIN is the unsigned fixed point 8-bit temperature sensor gain factor in
1/128th units stored in the signature row
TS_OFFSET is the signed twos complement temperature sensor offset reading
stored in the signature row. See
parameter address.
«
Temperature vs. Sensor Output Voltage (Typical Case): Example ADC Values
ADCL
Table 4-56
–
TS_GAIN
273
+
0x00F6
–40°C
are typical values. However, due to the process variation the
25 TS_OFFSET
–
Table 4-65 on page 246
Atmel ATA6616/ATA6617
°
C and the accuracy of the temperature mea-
128
0x0144
+25°C
+
25
for signature row
0c01B8
+85°C
Table
4-56.
227