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參數(shù)資料
| 型號(hào)： | MIC281-7YM6 |
| 廠商： | MICREL INC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | Low-Cost IttyBitty Thermal Sensor IttyBitty |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO6 |
| 封裝： | LEAD FREE, SOT-23, 6 PIN |
| 文件頁(yè)數(shù)： | 11/12頁(yè) |
| 文件大?。?/td> | 171K |
| 代理商： | MIC281-7YM6 |
November 2004
11
MIC281
MIC281
Micrel
Layout Considerations
The following guidelines should be kept in mind when design-
ing and laying out circuits using the MIC281:
1. Place the MIC281 as close to the remote diode
as possible, while taking care to avoid severe
noise sources such as high frequency power
transformers, CRTs, memory and data busses,
etc.
2. Since any conductance from the various volt-
ages on the PC board and the T1 line can in-
duce serious errors, it is good practice to guard
the remote diode’s emitter trace with a pair of
ground traces. These ground traces should be
returned to the MIC281’s own ground pin. They
should not be grounded at any other part of their
run. However, it is highly desirable to use these
guard traces to carry the diode’s own ground
return back to the ground pin of the MIC281,
thereby providing a Kelvin connection for the
base of the diode. See Figure 3.
3. When using the MIC281 to sense the tempera-
ture of a processor or other device which has an
integral thermal diode, e.g., Intel’s Pentium III,
connect the emitter and base of the remote sen-
sor to the MIC281 using the guard traces and
Kelvin return shown in Figure 3. The collector of
the remote diode is typically inaccessible to the
user on these devices.
REMOTE DIODE (T1)
GUARD/RETURN
1
2
VDD
GND
T1
6
5
4
3
NC
DATA
CLK
GUARD/RETURN
MIC281
Figure 3. Guard Traces/Kelvin Ground Returns
4. Due to the small currents involved in the mea-
surement of the remote diode’s
V
BE
, it is
important to adequately clean the PC board after
soldering to prevent current leakage. This is
most likely to show up as an issue in situations
where water-soluble soldering fluxes are used.
5. In general, wider traces for the ground and T1
lines will help reduce susceptibility to radiated
noise (wider traces are less inductive). Use trace
widths and spacing of 10mm wherever possible
and provide a ground plane under the MIC281
and under the connections from the MIC281 to
the remote diode. This will help guard against
stray noise pickup.
6. Always place a good quality power supply
bypass capacitor directly adjacent to, or un-
derneath, the MIC281. This should be a 0.1μF
ceramic capacitor. Surface mount parts provide
the best bypassing because of their low
inductance.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC281-7YM6 TR | 功能描述:板上安裝溫度傳感器 Local and Remote Temperature Sensor with I2C Temperature Sensor in SOT23-6 (Lead Free) RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| MIC2821-4GJLYML TR | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Single DC/DC + 3 LDOs w/ Indep Enables RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MIC2821-4GJLYML-TR | 功能描述:Handheld/Mobile Devices PMIC 16-MLF? (4x4) 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):停產(chǎn) 應(yīng)用:手持/移動(dòng)設(shè)備 電流 - 電源:- 電壓 - 電源:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-VFQFN 裸露焊盤，16-MLF? 供應(yīng)商器件封裝:16-MLF?（4x4） 標(biāo)準(zhǔn)包裝:1 |
| MIC2821-4GMSYML | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: 制造商:Micrel Inc 功能描述: |
| MIC2821-4GMSYML TR | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Single DC/DC + 3 LDOs w/ Indep Enables RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
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