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| 型号： | SA56004AD,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 22/43页 |
| 文件大小： | 516K |
| 描述： | IC TEMP SENSOR DIGITAL 8SOIC |
| 标准包装： | 2,500 |
| 功能： | 温度监控系统（传感器） |
| 传感器类型： | 内部和外部 |
| 感应温度： | -40°C ~ 125°C |
| 精确度： | ±3°C（最小值） |
| 拓扑： | ADC（三角积分型），多路复用器，寄存器库 |
| 输出类型： | I²C?/SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 带卷 (TR) |
| 其它名称： | 935274525118 SA56004AD-T SA56004AD-T-ND |
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SA56004X
All information provided in this document is subject to legal disclaimers.
?NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 7 25 February 2013
22 of 43
NXP Semiconductors
SA56004X
Digital temperature sensor with overtemperature alarms
7.10.1 Serial interface reset
If the SMBus master attempts to reset the SA56004X while the SA56004X is controlling
the data line and transmitting on the data line, the SA56004X must be returned to a known
state in the communication protocol. This may be accomplished in two ways:
1. When the SDATA is LOW, the SA56004X SMBus state machine resets to the SMBus
idle state if SCLK is held LOW for more than 35 ms (maximum TIMEOUT period).
According to SMBus specification 2.0, all devices are required to time out when the
SCLK line is held LOW for 25 ms to 35 ms. Therefore, to insure a time-out of all
devices on the bus, the SCLK line must be held LOW for at least 35 ms.
2. When the SDATA is HIGH, the master initiates an SMBus START. The SA56004X
responds properly to a SMBus START condition only during the data retrieving cycle.
After the START, the SA56004X expects an SMBus Address byte.
8. Application design-in information
8.1 Factors affecting accuracy
8.1.1 Remote sensing diode
The SA56004X is designed to work with substrate transistors built into processors CPUs
or with discrete transistors. Substrate transistors are generally PNP types with the
collector connected to the substrate. Discrete types can be either a PNP or an NPN
transistor connected as a diode (base shorted to collector). If an NPN transistor is used,
the collector and base are connected to D+ and the emitter to D-. If a PNP transistor is
used, the collector and base are connected to D- and the emitter to D+. Substrate
transistors are found in a number of CPUs. To reduce the error due to variations in these
substrate and discrete transistors, a number of factors should be considered:
" The ideality factor, n
f
, of the transistor. The ideality factor is a measure of the deviation
of the thermal diode from the ideal behavior. The SA56004X is trimmed for an n
f
value
of 1.008. Equation 2
can be used to calculate the error introduced at a temperature
T 癈 when using a transistor whose n
f
does not equal 1.008. Consult the processor
data sheet for n
f
values.
This value can be written to the offset register and is automatically added to or
subtracted from the temperature measurement.
(2)
" Some CPU manufacturers specify the high and low current levels of the substrate
transistors. The I
source
high current level of the SA56004X is 100 mA and the low-level
current is 10 mA.
If a discrete transistor is being used with the SA56004X, the best accuracy is obtained by
choosing devices according to the following criteria:
" Base-emitter voltage greater than 0.25 V at 6 mA, at the highest operating
temperature.
" Base-emitter voltage less than 0.95 V at 100 mA, at the lowest operating temperature.
T
n
natural
1.008
(
)
1.008
------------------------------------------ 273.15 Kelvin T
+
(
)
?/DIV>
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SA56004ADP | 制造商:NXPSEM 功能描述: |
| SA56004ADP,118 | 功能描述:板上安装温度传感器 TEMP SENSOR RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| SA56004AD-T | 功能描述:板上安装温度传感器 I2C LOC +/- 2OC AND REM +/- 1OC TS RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| SA56004ATK | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:±1 °C accurate, SMBus-compatible, 8-pin, remote/local digital temperature sensor with overtemperature alarms |
| SA56004ATK,118 | 功能描述:板上安装温度传感器 SMBUS-COMPATIBLE REM LOCL DIGI TEMP SENS RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
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