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Temperature Sensor and
System Monitor in a 10-Pin μMAX
Functional Diagram
V CC
Applications Information
Sensing Circuit Board and
Component Temperatures
Temperature sensor ICs like the MAX6683 that sense
their own die temperatures must be mounted on or
1.8V IN
2.5V IN
5.0V IN
INPUT VOLTAGE
SCALING AND
MULTIPLEXER
ADC
DATA AND
CONTROL
LOGIC
close to the object whose temperature they are intend-
ed to measure. Because there is a good thermal path
between the 10-pin μMAX package’s metal leads and
the IC die, the MAX6683 can accurately measure the
temperature of the circuit board to which it is soldered.
TEMPERATURE
SENSOR
VOLTAGE
REFERENCE
I 2 C/SMBus-
COMPATIBLE
INTERFACE
SDA
SCL
ALERT
ADD
If the sensor is intended to measure the temperature of
a heat-generating component on the circuit board, it
should be mounted as close as possible to that compo-
nent and should share supply and ground traces (if
they are not noisy) with that component where possible.
This maximizes the heat transfer from the component to
the sensor.
forming a Read Word operation, the MAX6683 writes
the 11 bits of data to the bus in two 8-bit words. The
upper byte contains the MSBs, while the lower byte
contains the 3LSBs (Figure 5). D9–D3 of the upper byte
represent the whole decimal number of the temperature
conversion and D10 is sign. D2–D0 of the lower byte
represent 1/2, 1/4, 1/8 of a degree, respectively, and
the remaining bits are disregarded.
Nine-bit temperature data (8 bits plus sign) is obtained
by setting bit 5 of the Configuration Register (address
40h) to 1, reducing the conversion time by a factor of
four, and executing a Read Word command to the
Temperature Data Register (address 27h). The upper
byte contains the MSBs, while the lower byte contains
the LSB (Figure 5). D7–D1 of the upper byte represent
the whole decimal number of the temperature conver-
sion and D0 is sign. D0 of the lower byte represents 1/2
of a degree, and the remaining bits are disregarded.
The thermal path between the plastic package and the
die is not as good as the path through the leads, so the
MAX6683, like all temperature sensors in plastic pack-
ages, is less sensitive to the temperature of the sur-
rounding air than to the temperature of the leads.
Wiring and circuits must be kept insulated and dry to
avoid leakage and corrosion, especially if they operate
at cold temperatures where condensation can occur.
Chip Information
TRANSISTOR COUNT: 13,446
PROCESS: BiCMOS
______________________________________________________________________________________
13
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相关代理商/技术参数
MAX6683EVSYS 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
MAX6684ESA 功能描述:马达/运动/点火控制器和驱动器 RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
MAX6684ESA+ 功能描述:马达/运动/点火控制器和驱动器 Fan-Failure Detector RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
MAX6684ESA+ 制造商:Maxim Integrated Products 功能描述:DETECTOR FAN-FAILURE 6684 SOIC8 制造商:Maxim Integrated Products 功能描述:DETECTOR, FAN-FAILURE, 6684, SOIC8
MAX6684ESA+T 功能描述:马达/运动/点火控制器和驱动器 Fan-Failure Detector RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
MAX6684ESA-T 功能描述:马达/运动/点火控制器和驱动器 RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
MAX6685AU40H 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
MAX6685AU40H+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