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Low-Voltage, 1.8kHz PWM Output Temperature
Sensors
3.3V
V ISO
MAX6676AUT3
V CC
5.1k ?
V DD
DOUT
MAX6676
DOUT
Figure 3. Galvanic Isolation Using an Optocoupler
Galvanic Isolation
Use an optocoupler to isolate the MAX6676/MAX6677
whenever a high common-mode voltage is present.
Choose an optocoupler with equal turn-on and turn-off
times. Unequal turn-on/turn-off times produce an error
in the temperature reading (Figure 3).
Thermal Considerations
Self-heating may cause the temperature measurement
accuracy of the MAX6676/MAX6677 to degrade in
some applications. The quiescent dissipation and the
power dissipated by the digital output may cause
errors in obtaining the accurate temperature measure-
ment. The temperature errors depend on the thermal
conductivity of the package (SOT23, +140 ° C/W), the
mounting technique, and the airflow. Static dissipation
is typically 4.0μW operating at 5V with no load. For
example, an out load of 3mA creates a maximum error
of less than 0.1 ° C.
Figure 4. Low-Voltage Logic
Multiple Logic Voltages
Use the MAX6676 open-drain output to drive devices
operating at supply voltages other than the MAX6676 ’ s
V CC . As shown in Figure 4, connect a pullup resistor
from the other supply voltage to the MAX6676 output.
Limit the resistor ’ s current to less than 1mA, thus main-
taining an output low logic level of less than 200mV.
Chip Information
TRANSISTOR COUNT: 2096
PROCESS: BiCMOS
6
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相关代理商/技术参数
MAX6676AUT3 制造商:Maxim Integrated Products 功能描述:LOW-VOLTAGE 1.8KHZ PWM OUTPUT TEMP - Cut Tape Product
MAX6676AUT3+ 功能描述:板上安装温度传感器 1.8kHz PWM 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
MAX6676AUT3+T 功能描述:板上安装温度传感器 1.8kHz PWM 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
MAX6676AUT3-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
MAX6676AUT5 制造商:Maxim Integrated Products 功能描述:LOW-VOLTAGE 1.8KHZ PWM OUTPUT TEMP - Cut Tape Product
MAX6676AUT5+ 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 1-WIRE 6PIN SOT-23 - Rail/Tube
MAX6676AUT5+T 功能描述:板上安装温度传感器 1.8kHz PWM 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
MAX6676AUT5-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