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参数资料
| 型号： | MAX6642ATT92+T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 温度/湿度传感器 |
| 英文描述： | ±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 1Cel, SQUARE, SURFACE MOUNT |
| 封装： | 3 X 3 MM, 0.80 MM HEIGHT, MO-229WEEA, TDFN-6 |
| 文件页数： | 4/14页 |
| 文件大小： | 213K |
| 代理商： | MAX6642ATT92+T |
MAX6642
Cable resistance also affects remote-sensor accuracy.
For every 1
Ω of series resistance, the error is approxi-
mately 1/2°C.
Thermal Mass and Self-Heating
When sensing local temperature, this device is intend-
ed to measure the temperature of the PCB to which it is
soldered. The leads provide a good thermal path
between the PCB traces and the die. Thermal conduc-
tivity between the die and the ambient air is poor by
comparison, making air temperature measurements
impractical. Because the thermal mass of the PCB is far
greater than that of the MAX6642, the device follows
temperature changes on the PCB with little or no per-
ceivable delay.
When measuring temperature of a CPU or other IC with
an on-chip sense junction, thermal mass has virtually
no effect; the measured temperature of the junction
tracks the actual temperature within a conversion cycle.
When measuring temperature with discrete remote sen-
sors, smaller packages, such as SOT23s, yield the best
thermal response times. Take care to account for ther-
mal gradients between the heat source and the sensor,
and ensure that stray air currents across the sensor
package do not interfere with measurement accuracy.
Self-heating does not significantly affect measurement
accuracy. Remote-sensor self-heating due to the diode
current source is negligible. For the local diode, the
worst-case error occurs when autoconverting at the
fastest rate and simultaneously sinking maximum cur-
rent at the ALERT output. For example, with VCC =
+5.0V, at an 8Hz conversion rate and with ALERT sink-
ing 1mA, the typical power dissipation is:
5.0V x 450A + 0.4V x 1mA = 2.65mW
J-A for the 6-pin TDFN package is about +41°C/W, so
assuming no copper PCB heat sinking, the resulting
temperature rise is:
ΔT = 2.65mW x 41°C/W = +0.11°C
Even under nearly worst-case conditions, it is difficult to
introduce a significant self-heating error.
±1°C, SMBus-Compatible Remote/Local
Temperature Sensor with Overtemperature Alarm
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6642ATT94+ | 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 2-WIRE 6TDFN EP - Rail/Tube |
| MAX6642ATT94+T | 功能描述:板上安装温度传感器 SMBus-Compatible Temperature 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 |
| MAX6642ATT94-T | 功能描述:板上安装温度传感器 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 |
| MAX6642ATT96+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX6642ATT96-T | 功能描述:板上安装温度传感器 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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