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| 型号： | TMP141AIDBVTG4 |
| 厂商： | Texas Instruments |
| 文件页数： | 11/24页 |
| 文件大小： | 662K |
| 描述： | IC TEMP SENSOR DGTL OUT SOT23-6 |
| 标准包装： | 250 |
| 系列： | SensorPath™ |
| 功能： | 温度监控系统（传感器） |
| 传感器类型： | 内部 |
| 感应温度： | -40°C ~ 125°C |
| 精确度： | ±3°C（最小值） |
| 拓扑： | ADC（三角积分型），寄存器库 |
| 输出类型： | 1 线 SensorPath? |
| 输出警报： | 无 |
| 输出风扇： | 无 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-23-6 |
| 包装： | 带卷 (TR) |
TMP141
SBAS347A MARCH 2005 REVISED JULY 2006
www.ti.com
11
Register 4: Device Status (Read-Only)
This is an 8-bit register with the following bits defined:
Bit 7, Bus Error (BER): This bit is set whenever there is
an error indication in the Acknowledge bit of either
received or transmitted data. A bus error is cleared when
the master reads the Device Status Register or sends
Device Reset.
Bits 65: Reserved. These bits read as 0.
Bit 4, Overrun (ORUN): This flag is set when another
temperature conversion is completed before the previous
conversion has been read by the master. This error is
cleared by Device Reset, or by reading the temperature
result from the Temperature Readout register.
Bits 31: Reserved. These bits read as 0.
Bit 0, Status Function 1 (SF1): This flag is set when a
temperature conversion is completed, and the data is
stored in the Readout register. It is reset either when the
master reads the temperature conversion, or when the
TMP141 is reset.
Register 5: Device Control (Read/Write)
Bits 155: Reserved. These bits read as 0.
Bit 4, Enable Function 1 (ENAB): This bit enables
temperature measurement; the default setting is disabled.
To begin temperature measurement, a 1 must be written
to this bit. The enable sensor bit (EN_S) in the
Temperature Control register must also be set to enable
the sensor. (Bits cannot be written individually; a Write
operation affects the entire register.)
Bit 3: Reserved. This bit reads as 0.
Bit 2, Low-Power Mode: When this bit is set, the
operation of all functions slow down in order to conserve
power. Default is 0 for normal speed operation. (See
Table 4.)
Bit 1, Shutdown: When this bit is set, all functions are
disabled, placing the TMP141 in the lowest possible power
consumption mode. Default is 0; this is normal operation.
To exit shutdown, write a 0 to this location.
Bit 0, Reset: When this bit is set, the TMP141 performs a
Device Reset. During Reset, any operation is progress is
aborted, and all registers are set to their default values.
This bit self-clears when the Reset operation is completed.
It is not necessary to do a Device Reset after power-up.
Bits 10: These bits are the only location in the TMP141
that accepts a broadcast Write message.
Register 8: Temperature Capabilities (Read-Only)
Bits 159: Reserved. These bits read as 0.
Bit 8: This bit is set, indicating that the internal temperature
sensing is the only option available.
Bit 7: This bit is 0; it indicates that the TMP141 Tempera-
ture Readout register is 16 bits.
Bit 6: This bit is set to indicate that signed twos
complement is the format of the temperature data.
Bits 53: These bits are 001b; they indicate that the
temperature data is 10 bits long.
Bits 20: These bits are 010b, and indicate that the
temperature data resolution is 0.25癈.
Register 9: Temperature Readout (Read-Only)
The TMP141 outputs 10 bits of precision to a resolution of
0.25癈. This 10-bit format covers a range from +127.75癈
to 128癈. Negative numbers are in twos complement.
Table 3 shows some examples of the Temperature Data
format.
Data is left-justified, meaning that the ten bits of data are
in the most significant bits of this register. The temperature
data is contained in Bits 15:6. Bits 5:0 always read as 0.
Table 3. Data Format Example
TEMPERATURE
BINARY
HEX
+127.75癈
(1)
01 1111 1111
1FFh
+125.00癈
01 1111 0100
1F4h
+100.0癈
01 1001 0000
190h
+1.0癈
00 0000 0100
004h
+0.25癈
00 0000 0001
001h
0癈
00 0000 0000
000h
0.25癈
11 1111 1111
3FFh
1.0癈
11 1111 1100
3FCh
100癈
10 0111 0000
270h
128癈
(1)
10 0000 0000
200h
(1)
Both 128癈 and +127.75癈 are beyond the specified operating
range of 40癈 to +125癈. This table only illustrates the format
of the data.
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