CXHA3181三个通道测量两个远程和一个本地温度用晶体管模型测量热二极管 支持单核双核和四核CPU应用内置遥感器噪音抑制器SMBus 2线串行接口可编程欠温/超温报警支持SMBus警报响应

CXHA3181是一个精确的数字温度计，它可以报告2个远程传感器和它自己的软件包的温度。远程传感器是二极管连接晶体管，通常是一种低成本、易于安装的2N3904 NPN型，取代了传统的热敏电阻或热电偶。远程精度为±1°C，无需校准。它还具有内置的噪声过滤功能，用于遥感器测量二极管温度。远程通道还可以测量其他集成电路（如微处理器）的芯片温度，这些集成电路包含一个片上二极管连接的晶体管。2线串行接口接受标准系统管理总线（SMBus）的写入字节、读取字节、发送字节和接收字节命令，以编程报警阈值和读取温度数据。数据格式为11位加号，每一位对应0.125°C，采用两位补码格式。测量可以自动和自主地进行，转换率由用户编程或编程为在单次拍摄模式下操作。可调速率允许用户控制电源电流消耗。CXHA3181有一个小的，10针MSOP表面安装包。
三个通道：测量两个远程和一个本地温度
用晶体管模型测量热二极管
支持单核、双核和四核CPU应用
无需校准
·内置遥感器噪音抑制器
SMBus 2线串行接口
可编程欠温/超温报警
支持SMBus警报响应
“精度：±1°C（+60°C至+100°C，远程）±3°C（+60°C至+100°C，本地）
·转换期间320μA（典型）平均电源电流
用晶体管模型测量热二极管
支持45nm、65nm和90nm CPU热二极管
+3V至+5.5V电源范围
小型8-铅标准操作规程、MSOP和TDFN包
“使用偏移移位法进行高达160°C的远程温度测量（参见“测量高于127°C的远程温度”一节）

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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The CXHA3181 is a precise digital thermometer that reports the temperature of 2 remote sensors and its own package. The remote sensors are diodeconnected transistors typically a low-cost, easily mounted 2N3904 NPN type that replace conventional thermistors or thermocouples. Remote accuracy is ±1°C with no calibration needed. It also has a build-in noise filtering function in remote sensor measuring the diode temperature. The remote channel can also measure the die temperature of other ICs, such as microprocessors, that contain an on-chip, diode-connected transistor. The 2-wire serial interface accepts standard System Management Bus (SMBus) Write Byte, Read Byte, Send Byte, and Receive Byte commands to program the alarm thresholds and to read temperature data. The data format is 11bits plus sign, with each bit corresponding to 0.125°C, in two’s-complement format. Measurements can be done automatically and autonomously, with the conversion rate programmed by the user or programmed to operate in a single-shot mode. The adjustable rate allows the user to control the supply current drain. The CXHA3181 is available in a small, 10-pin MSOP surface-mount package.

   产品特点 返回TOP

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„ Three Channels: Measures Two Remote and One Local Temperatures 

„ Measure Thermal Diode with a Transistor Model 

„ Support Single-Core, Dual-Core and Quad-Core CPU Application 

„ No Calibration Required 

„ Built-in Noise-Buster for Remote Sensor 

„ SMBus 2-Wire Serial Interface 

„ Programmable Under/Overtemperature Alarms 

„ Supports SMBus Alert Response 

„ Accuracy: ±1°C (+60°C to +100°C, remote) ±3°C (+60°C to + 100°C, local) 

„ 320μA (typ) Average Supply Current During Conversion 

„ Measure Thermal Diode with Transistor Model 

„ Support 45nm, 65nm and 90nm CPU thermal diode 

„ +3V to +5.5V Supply Range 

„ Small 8-Lead SOP , MSOP and TDFN Package 

„ Remote Temperature Measurment up to 160°C by using offset shifting method (see “Measure Remote Temperature Higher Than 127°C” section)

   应用范围 返回TOP

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Desktop and Notebook 

Central Office 

Computers 

Telecom Equipment 

Smart Battery Packs 

Test and Measurement 

LAN Servers 

Multi-Chip Modules 

Industrial Controllers

   技术规格书（产品PDF) 返回TOP 

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     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！

 

产品封装图 返回TOP

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电路原理图 返回TOP

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相关芯片选择指南 返回TOP                            更多同类产品......

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Temperature Transducer
Part NO.	VCC(V) min.	VCC(V) max.	Sensor  Gain	VOUT (V)	Sensor  Range(°C)	Accuracy  (°C)	Isupply (μA)	Note	Package
CXHA3174	2	5.5	-11.6	2.5~0.3	-55~130	±1	18	Negative temperature coefficient output	TO126F/SC70-5(SOT353)
Digital Interface Temperature Sensor
Part NO.	VCC(V) min.	VCC(V) max.	Remote	Local	Interface	Slave  Address	Accuracy  (°C)	Note	Package
CXHA3175	3	5.5	N	1	SMBus	1001XXX	±2	8 slave addresses 9 bits  resolution	SOP8/MSOP8/TDFN3X3-8
CXHA3176	3	5.5	N	1	SMBus	1001XXX	±1	8 slave addresses 11 bits resolution	SOP8/MSOP8/TDFN3X3-8 /TDFN3X2-8
CXHA3177	3	3.6	N	1	SMBus	1001000	±1	-10°C to 80°C±1°C(max)	SOT23-5
CXHA3178	3	5.5	1	1	SMBus	1001100	±1	Support transitor mode	SOP8/MSOP8
CXHA3179	3	5.5	1	1	SMBus	1001100	±1	Remote up to 160°C	SOP8/MSOP8/TDFN3X3-8
CXHA3180	3	5.5	N	1	SMBus	1001100	±3	Local temperature sensor	MSOP8
CXHA3181	3	5.5	2	1	SMBus	1001100	±1	Support   transistor mode	MSOP10
CXHA3182	3	5.5	1	1	SMBus	1001100	±1	SMBus inputs are built-in switch to prevent reverse leakage	SOP8/MSOP8/TDFN3X3-8
CXHA3183	3	5.5	1	1	SMBus	1001100	±1	Griffin	SOP8 MSOP8
Thermal Switch
Part NO.	VCC(V) min.	VCC(V) max.	Sensor	Hysterisis VCCGND	Output  Type	Accuracy (°C)	Isupply  (μA)	Note	Package
CXHA3184	4	5.5	--	10 or 30	Open Drain	±3.5	33	N/A	SOT23-5
CXHA3185	3	5.5	Remote	10   or 2	Open Drain	±3	--	OT is set by SET0 and SET1, Thermal diode needed	SOP8/MSOP8
CXHA3186	2.7	5.5	Local	10 or 30	Open Drain	±3.5	33	OT is set by an external resistor	SOT23-5/TDFN2X2-8
CXHA3187	2.7	5.5	Local	10   or 2	Open Drain	±3.5	33	OT is set by an external resistor	TDFN2X2-8/ADFN1.5X1.5-6/SOT23-5/SOT23-6
CXHA3188	2.7	5.5	Remote	Set   by Resistor	Open Drain	--	70	8 Remote SensorsThermistor is needed	TQFN3X3-16
CXHA3189	2.7	5.5	Remote	Set by Resistor	Open Drain	--	42	2 Remote SensorsThermistor is needed	SOT23-8/AQFN1.5X1.5-8