Specification:
Our company provide original DS18B20 digital sensor and its further assembly. The assemblied sensor use metal house( tubing type or screw type) and 3 screen wires to enhance ability of anti-noise.
The DSl820 digital thermometer provides 9-bit (binary) temperature readings indicating device temperature information via single-wire interface.
Into the DSl820 or sent from the DSl820 So from the host CPU to the DSl820 only one line (and ground) DSl820
The power supply can be provided by the data line itself without the need for an external power source because each DSl820 has been given at the factory
A serial number so any number of DSl820 can be stored on the same single line bus which allows in many different places.
Place the temperature sensitive device DSl820 with a measurement range from -55 to +125 increments of 0.5 on ls (typical) inside the temperature into a number.
Each DSl820 includes a unique 64-bit serial number for that the serial number is stored in the ROM (read-only memory) of the DSl820 8 is the product type code (DSl820 encoding are 10H) followed by 48
Bit is the only serial number of each device. The last 8 bits are the first 56 bits CRC (Cyclic Redundancy Check) code DSl820 also used for storage.
The measured temperature values of the two 8-bit memory RAM numbers are 0 and No. 1 memory stored in the temperature value of the symbol if the temperature is negative.Then No. 1 memory 8 is all 1 otherwise all 0. 0 memory for storage.Set the temperature value of the complement LSB (at least significant bit) of 1 to 0.5.
Each of the DS1820s can be set to two power supply modes.Bus power supply mode and external power supply mode to take data bus power supply can save a wire but complete the temperature measurement.
The longer the time to take an external power supply is more than a wire but the measurement speed faster.
Single-bus technology, either through the serial port line, but also through other i / o port line interface, without passing through other conversion circuit, directly output measured temperature value.
1. Temperature range of -55 ºC ~ +125 ºC, the measurement resolution of 0.0625 ºC; -10 ~ +85 ºC when the accuracy of ± 0.5 ºC.
2. Available data lines, voltage range: 3.0 ~ 5.5V
3. Negative pressure characteristics: power polarity reverse, the thermometer is not good because of fever and burned, but can not work properly.
4. Programmable resolution of 9 to 12, the corresponding resolution of the temperature were 0.5 ºC, 0.25 ºC, 0.125 ºC and 0.0625 ºC, to achieve high-precision temperature measurement.
5. Contains 64-bit laser-corrected read-only memory.
6. Adapt to a variety of single-chip or system machine
7. Users can distinguish between the upper and lower limits of the temperature
8. Contains parasitic power supply
Product features:
DS18B20 sensor is digital temperature sensor. It is a usual temperature sensor with advantage of small body, accuracy measuring and strong noise screening sensor. It has good stability and can be macthed with other products.
DS18B20 pin definition:
DQ is the input/output of digital signal
GND is the power field
VDD is the input terminal of external power supply power supply (grounding when the parasitic power connection mode is connected)
Parameters:
| Product name |
Digital temperature sensor |
| Electronic pressure range |
3.0~5.5v |
| Characteristics |
High accuracy of temperature measuring |
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