TMP451温度传感器

1.特点

1. 符合汽车应用要求
2. 具有符合 AEC-Q100 标准的下列特性：
– 器件温度等级 1：-40°C 至 125°C 环境工作温度
范围
3. 本地和远程二极管传感器精度为 ±1°C
4. 本地和远程通道的分辨率为 0.0625°C
5. 1.7V 至 3.6V 电源和逻辑电压范围
6. 27μA 运行电流，3μA 关断电流
7. 串联电阻抵消
8. 可编程数字滤波器
9. 二极管故障检测
10. 双线和 SMBus™ 串行接口

2.TMP451

name	namber	type	description
ALERT/ THERM2	6	Digital output	Interrupt or SMBus alert output. Can be configured as a second THERM output. Open-drain; requires pullup resistor to voltage between 1.7 V and 3.6 V.
D–	3	Analog input	Negative connection to remote temperature sensor.
D+	2	Analog input	Positive connection to remote temperature sensor.
GND	5	Ground	Supply ground connection.
SCL	8	Digital output	Serial clock line for SMBus. Input; requires pullup resistor to voltage between 1.7 V and 3.6 V if driven by open-drain output.
SDA	7	Bidirectional digital input-output	Serial data line for SMBus. Open-drain; requires pullup resistor to voltage between 1.7 V and 3.6 V.
THERM	4	Digital output	Thermal shutdown or fan-control pin. Open-drain; requires pullup resistor to voltage between 1.7 V and3.6 V.
V+	1	Power supply	Positive supply voltage, 1.7 V to 3.6 V.

2-1.使用介绍

TMP451可以分别读取本地温度与远端温度。
TMP451的ALERT/THERM2与THERM管脚在温度正常情况下都为高电平。当达到预设高温，通过ALERT/THERM2管脚电平翻转为低向外界传递高温报警信号，同理，THERM管脚电平为低则达到极高温度上限。

2-2.通信

通信要求如下：
	IIC通信的快速模式1K-400KHZ频率，在高速模式1K-2500KHZ频率；

3、寄存器