CXHA3178 CXHA3179是一个精确的数字温度计，它可以报告遥感器和它自己的软件包的温度。遥感器是一个二极管连接的晶体管，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。CXHA3178 CXHA3179有一个8针的小型SOP、MSOP和TDFN表面安装包。
双通道：测量远程和本地温度
用晶体管模型测量热二极管
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）
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产品概述 返回TOP
产品特点 返回TOP
„ Two Channels: Measures Both Remote and Local Temperatures
„ Measure Thermal Diode with a Transistor Model
„ 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
Desktop and Notebook
Central Office
Computers
Telecom Equipment
Smart Battery Packs
Test and Measurement
LAN Servers
Multi-Chip Modules
Industrial Controllers
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电路原理图 返回TOP
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Temperature Transducer |
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|
Part NO. |
VCC(V) min. |
VCC(V) max. |
Sensor Gain |
VOUT (V) |
Sensor Range(°C) |
Accuracy (°C) |
Isupply (μA) |
Note |
Package |
|
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 |
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|
Part NO. |
VCC(V) min. |
VCC(V) max. |
Remote |
Local |
Interface |
Slave Address |
Accuracy (°C) |
Note |
Package |
|
3 |
5.5 |
N |
1 |
SMBus |
1001XXX |
±2 |
8 slave addresses 9 bits resolution |
SOP8/MSOP8/TDFN3X3-8 |
|
|
3 |
5.5 |
N |
1 |
SMBus |
1001XXX |
±1 |
8 slave addresses 11 bits resolution |
SOP8/MSOP8/TDFN3X3-8 /TDFN3X2-8 |
|
|
3 |
3.6 |
N |
1 |
SMBus |
1001000 |
±1 |
-10°C to 80°C±1°C(max) |
SOT23-5 |
|
|
3 |
5.5 |
1 |
1 |
SMBus |
1001100 |
±1 |
Support transitor mode |
SOP8/MSOP8 |
|
|
3 |
5.5 |
1 |
1 |
SMBus |
1001100 |
±1 |
Remote up to 160°C |
SOP8/MSOP8/TDFN3X3-8 |
|
|
3 |
5.5 |
N |
1 |
SMBus |
1001100 |
±3 |
Local temperature sensor |
MSOP8 |
|
|
3 |
5.5 |
2 |
1 |
SMBus |
1001100 |
±1 |
Support transistor mode |
MSOP10 |
|
|
3 |
5.5 |
1 |
1 |
SMBus |
1001100 |
±1 |
SMBus inputs are built-in switch to prevent reverse leakage |
SOP8/MSOP8/TDFN3X3-8 |
|
|
3 |
5.5 |
1 |
1 |
SMBus |
1001100 |
±1 |
Griffin |
SOP8 MSOP8 |
|
|
Thermal Switch |
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|
Part NO. |
VCC(V) min. |
VCC(V) max. |
Sensor |
Hysterisis VCCGND |
Output Type |
Accuracy (°C) |
Isupply (μA) |
Note |
Package |
|
4 |
5.5 |
-- |
10 or 30 |
Open Drain |
±3.5 |
33 |
N/A |
SOT23-5 |
|
|
3 |
5.5 |
Remote |
10 or 2 |
Open Drain |
±3 |
-- |
OT is set by SET0 and SET1, Thermal diode needed |
SOP8/MSOP8 |
|
|
2.7 |
5.5 |
Local |
10 or 30 |
Open Drain |
±3.5 |
33 |
OT is set by an external resistor |
SOT23-5/TDFN2X2-8 |
|
|
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 |
|
|
2.7 |
5.5 |
Remote |
Set by Resistor |
Open Drain |
-- |
70 |
8 Remote SensorsThermistor is needed |
TQFN3X3-16 |
|
|
2.7 |
5.5 |
Remote |
Set by Resistor |
Open Drain |
-- |
42 |
2 Remote SensorsThermistor is needed |
SOT23-8/AQFN1.5X1.5-8 |
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