C8051F351-GMR Silicon Laboratories Inc, C8051F351-GMR Datasheet - Page 77
C8051F351-GMR
Manufacturer Part Number
C8051F351-GMR
Description
IC 8051 MCU 8K FLASH 28MLP
Manufacturer
Silicon Laboratories Inc
Series
C8051F35xr
Specifications of C8051F351-GMR
Core Processor
8051
Core Size
8-Bit
Speed
50MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
POR, PWM, Temp Sensor, WDT
Number Of I /o
17
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x24b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
Processor Series
C8051F3x
Core
8051
Data Bus Width
8 bit
Data Ram Size
768 B
Interface Type
I2C, SMBus, SPI, UART
Maximum Clock Frequency
50 MHz
Number Of Programmable I/os
17
Number Of Timers
4
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
KSK-SL-TOOLSTICK, PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F350DK
Minimum Operating Temperature
- 40 C
On-chip Adc
24 bit, 8 Channel
On-chip Dac
8 bit, 2 Channel
For Use With
336-1083 - DEV KIT FOR F350/351/352/353
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
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8.
The temperature sensor system consists of two diodes with different temperature properties and two con-
stant current sources. The two channels are connected to the ADC inputs internally, using the ADC’s ana-
log multiplexer. The temperature sensor system can be used in single-ended or differential mode to
measure the temperature of the C8051F350/1/2/3. Single channel measurements produce more output
voltage per degree C, but are not as linear as differential measurements. See Table 8.1 for temperature
sensor electrical characteristics.
The temperature sensor channels are automatically enabled when they are selected by the ADC multi-
plexer. To use the temperature sensor for a single-channel measurement, the ADC multiplexer should be
configured with one channel connected to the temperature sensor, and the other connected to AGND. For
a differential measurement, the temperature sensor should be selected for both ADC channels.
The transfer functions for single-channel and differential measurements are shown in Figure 8.2 and
Figure 8.3, respectively. For slope and offset values, refer to Table 8.1.
Table 8.1. Temperature Sensor Electrical Characteristics
V
Linearity
Offset
Offset Error*
Slope
Slope Error*
AV+ Supply Current
*Note: Represents one standard deviation from the mean.
DD
= 3.0 V; –40 to +85 °C unless otherwise specified.
Temperature Sensor
Parameter
Figure 8.1. Temperature Sensor Block Diagram
AIN+ Channel Measurement, Temp = 0 °C
Differential Measurement, Temp = 0 °C
Channel
AIN+
Single Channel Measurement
Single Channel Measurement
AIN+ Channel Measurement
Differential Measurement
Differential Measurement
Differential Measurement
AGND
Conditions
AV+
Rev. 1.1
Channel
AIN-
To AIN+ Mux
To AIN- Mux
C8051F350/1/2/3
Min
—
—
—
—
—
—
±0.01
–1.73
±0.4
54.3
±6.6
Typ
757
205
±1
10
20
Max
—
—
—
—
—
—
mV/°C
uV/°C
µV/°C
Units
mV
mV
mV
µA
µA
°C
°C
77
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