SI1011-A-GM Silicon Laboratories Inc, SI1011-A-GM Datasheet - Page 283

• Manufacturer Part Number: SI1011-A-GM
• Description: IC TXRX MCU + EZRADIOPRO
• Manufacturer: Silicon Laboratories Inc

Specifications of SI1011-A-GM

• Package / Case: 42-QFN
• Frequency: 240MHz ~ 960MHz
• Data Rate - Maximum: 256kbps
• Modulation Or Protocol: FSK, GFSK, OOK
• Applications: General Purpose
• Power - Output: 20dBm
• Sensitivity: -121dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 18.5mA
• Current - Transmitting: 85mA
• Data Interface: PCB, Surface Mount
• Memory Size: 8kB Flash, 768B RAM
• Antenna Connector: PCB, Surface Mount
• Number Of Receivers: 1
• Number Of Transmitters: 1
• Wireless Frequency: 240 MHz to 960 MHz
• Interface Type: UART, SMBus, SPI, PCA
• Output Power: 20 dBm
• Operating Supply Voltage: 0.9 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 4 mA
• Minimum Operating Temperature: - 40 C
• Modulation: FSK, GFSK, OOK
• Protocol Supported: C2, SMBus
• Core: 8051
• Program Memory Type: Flash
• Program Memory Size: 8 KB
• Data Ram Size: 768 B
• Supply Current (max): 4 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1872-5

The slope of the temperature sensor is very linear and monotonic. For absolute accuracy better than 10 °C
calibration is necessary. The temperature sensor may be calibrated by setting entsoffs = 1 in “Register
12h. Temperature Sensor Control” and setting the offset with the tvoffs[7:0] bits in “Register 13h. Tempera-
ture Value Offset.” This method adds a positive offset digitally to the ADC value that is read in “Register
11h. ADC Value.” The other method of calibration is to use the tstrim which compensates the analog cir-
cuit. This is done by setting entstrim = 1 and using the tstrim[2:0] bits to offset the temperature in “Register
12h. Temperature Sensor Control.” With this method of calibration, a negative offset may be achieved.
With both methods of calibration better than ±3 °C absolute accuracy may be achieved.
The different ranges for the temperature sensor and ADC8 are demonstrated in Figure 23.22. The value of
the ADC8 may be translated to a temperature reading by ADC8Value x ADC8 LSB + Lowest Temperature
in Temp Range. For instance for a tsrange = 00, Temp = ADC8Value x 0.5 – 64.
Add
Note: Absolute temperature mode, no temperature shift. This mode is only for test purposes. POR value of
12
13
entoff
0*
1
1
1
1
R/W
R/W Temperature Value
EN_TOFF is 1.
R/
W
Sensor Control
tsrange[1]
Description
Temperature
Function/
Offset
0
0
1
1
1
Table 23.7. Temperature Sensor Range
tsrange[0]
tsrange[1]
tvoffs[7]
D7
0
1
0
1
0
tsrange[0]
tvoffs[6]
D6
Temp. range
–64 … 192
–40 … 216
–64 … 64
0 … 128
0 … 341
Rev. 1.0
entsoffs
tvoffs[5]
D5
entstrim
tvoffs[4]
D4
Unit
°C
°C
°C
°F
°K
tstrim[3]
tvoffs[3]
D3
Si1010/1/2/3/4/5
8 mV/°C
4 mV/°C
8 mV/°C
4 mV/°F
3 mV/°K
tstrim[2]
tvoffs[2]
Slope
D2
vbgtrim[1] vbgtrim[0]
tvoffs[1]
D1
tvoffs[0]
ADC8 LSB
D0
1.333 °K
0.5 °C
0.5 °C
1 °C
1 °F
POR
Def.
20h
00h
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