C8051F302 Silicon Laboratories Inc, C8051F302 Datasheet - Page 33
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C8051F302
Manufacturer Part Number
C8051F302
Description
IC 8051 MCU 8K FLASH 11MLP
Manufacturer
Silicon Laboratories Inc
Series
C8051F30xr
Specifications of C8051F302
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), UART/USART
Peripherals
POR, PWM, Temp Sensor, WDT
Number Of I /o
8
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x8b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
11-VQFN
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
I2C, SMBus, UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
8
Number Of Timers
16 bit
Operating Supply Voltage
2.7 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
8 bit
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Lead Free Status / Rohs Status
No
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F302-GMR
Manufacturer:
SiliconL
Quantity:
3 000
Company:
Part Number:
C8051F302-GMR
Manufacturer:
SILICON
Quantity:
5 000
Part Number:
C8051F302-GMR
Manufacturer:
SILICONLABS/芯科
Quantity:
20 000
5.2.
The typical temperature sensor transfer function is shown in Figure 5.2. The output voltage (V
PGA input when the temperature sensor is selected by bits AMX0P2-0 in register AMX0SL; this voltage will be
amplified by the PGA according to the user-programmed PGA settings.
The uncalibrated temperature sensor output is extremely linear and suitable for relative temperature measurements
(see Table 5.1 for linearity specifications). For absolute temperature measurements, gain and/or offset calibration is
recommended. Typically a 1-point calibration includes the following steps:
Figure 5.3 shows the typical temperature sensor error assuming a 1-point calibration at 25 °C. Note that parameters
which affect ADC measurement, in particular the voltage reference value, will also affect temperature mea-
surement.
Temperature Sensor
Step 1. Control/measure the ambient temperature (this temperature must be known).
Step 2. Power the device, and delay for a few seconds to allow for self-heating.
Step 3. Perform an ADC conversion with the temperature sensor selected as the positive input and GND
Step 4. Calculate the offset and/or gain characteristics, and store these values in non-volatile memory for
selected as the negative input.
use with subsequent temperature sensor measurements.
Figure 5.2. Typical Temperature Sensor Transfer Function
1200
1100
1000
(mV)
900
800
700
-50
0
Rev. 2.3
V
TEMP
50
= 3.35*(TEMP
C8051F300/1/2/3/4/5
C
100
) + 897 mV
(Celsius)
TEMP
) is the positive
33