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DS1620
DS1620 FUNCTIONAL BLOCK DIAGRAM Figure 1
The DS1620 measures temperature using a bandgap-based temperature sensor. The temperature reading
is provided in a 9–bit, two’s complement reading by issuing a READ TEMPERATURE command. The
data is transmitted serially through the 3–wire serial interface, LSB first. The DS1620 can measure
temperature over the range of -55 ° C to +125 ° C in 0.5 ° C increments. For Fahrenheit usage, a lookup table
or conversion factor must be used.
Since data is transmitted over the 3–wire bus LSB first, temperature data can be written to/read from the
DS1620 as either a 9–bit word (taking RST low after the 9 th (MSB) bit), or as two transfers of 8–bit
words, with the most significant 7 bits being ignored or set to 0, as illustrated in Table 3. After the MSB,
the DS1620 will output 0s.
Note that temperature is represented in the DS1620 in terms of a ? ° C LSB, yielding the 9–bit format
shown in Figure 2.
TEMPERATURE, TH, and TL REGISTER FORMAT Figure 2
MSB
LSB
X
X
X
X
X
X
X
1
1
1
0
0
1
1
1
0
T = -25°C
3 of 12
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相关代理商/技术参数
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DS1620S/T&R 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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