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參數資料
| 型號： | TMP401AIDGKTG4 |
| 廠商： | Texas Instruments |
| 文件頁數： | 6/28頁 |
| 文件大小： | 881K |
| 描述： | IC TEMP SENSOR DGTL OUT 8-MSOP |
| 標準包裝： | 250 |
| 功能： | 溫度監控系統（傳感器） |
| 傳感器類型： | 內部和外部 |
| 感應溫度： | -40°C ~ 125°C |
| 精確度： | ±3°C 本地（最大），±5°C 遠程（最大） |
| 拓撲： | ADC，比較器，寄存器庫 |
| 輸出類型： | 2 線 SMBus? |
| 輸出警報： | 是 |
| 輸出風扇： | 是 |
| 電源電壓： | 3 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 8-MSOP |
| 包裝： | 帶卷 (TR) |
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TMP401
SBOS371A AUGUST 2006 REVISED OCTOBER 2007
www.ti.com
6
APPLICATIONS INFORMATION
The TMP401 is a dual-channel digital temperature sensor
that combines a local die temperature measurement
channel and a remote junction temperature measurement
channel in a single MSOP-8 package. The TMP401 is
Two-Wire- and SMBus interface-compatible and is
specified over a temperature range of 40癈 to +125癈.
The TMP401 contains multiple registers for holding
configuration information, temperature measurement
results, temperature comparator limits, and status
information.
User-programmed high and low temperature limits stored
in the TMP401 can be used to monitor local and remote
temperatures to trigger an over/under temperature alarm
(ALERT
). Additional thermal limits can be programmed
into the TMP401 and used to trigger another flag (THERM
)
that can be used to initiate a system response to rising
temperatures.
The TMP401 requires only a transistor connected
between D+ and D for proper remote temperature
sensing operation. The SCL and SDA interface pins
require pull-up resistors as part of the communication bus,
while ALERT
and THERM
are open-drain outputs that also
need pull-up resistors. ALERT
and THERM
may be shared
with other devices if desired for a wired-OR
implementation. A 0.1礔 power-supply bypass capacitor
is recommended for good local bypassing. Figure 11
shows a typical configuration for the TMP401.
0.1礔
10k
&
(typ)
10k
&
(typ)
10k
&
(typ)
10k
&
(typ)
TMP401
D+
D
V+
1
8
7
6
4
5
3
2
R
S
(2)
R
S
(2)
C
DIFF
(3)
C
DIFF
(3)
R
S
(2)
R
S
(2)
GND
SCL
SDA
ALERT/THERM2
THERM
+5V
SMBus
Controller
Fan Controller
Diodeconnected configuration
(1)
:
Series Resistance
Transistorconnected configuration
(1)
:
(1) Diodeconnected configuration provides better settling time.
Transistorconnected configuration provides better series resistance
cancellation. 2N3906 PNP.
(2) R
S
should be < 1.5k& in most applications.
(3) C
DIFF
should be < 1000pF in most applications.
NOTES:
Figure 11. Basic Connections
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