The DS18B20 digital thermometer provides 9-bit to  12-bit Celsius temperature measurements and has an  alarm function with nonvolatile user- programmable  upper and lower trigger points. The DS18B20  communicates over a 1-Wire bus that by definition  requires only one data line (and ground) for  communication with a central microprocessor. It has  an operating temperature range of -55°C to +125°C  and is accurate to ±0.4°C over the range of -10°C to  +70°C. In addition, the DS18B20 can derive power  directly from the data line (“parasite power”),  eliminating the need for an external power supply. Each DS18B20 has a unique 64-bit serial code,  which allows multiple DS18B20s to function on the  same 1-Wire bus. Thus, it is simple to use one  microprocessor to control many DS18B20s  distributed over a large area. Applications that can  benefit from this feature include HVAC  environmental controls, temperature monitoring  systems inside buildings, equipment, or machinery,  and process monitoring and control systems.

The TMP36 is a low voltage, precision  centigrade temperature sensors, which provides an  analog voltage output that is linearly proportional  to the Celsius (Centigrade) temperature. Every  GX36 chip is factory calibrated, so no external  calibration is required, and the typical accuracy is  ±1°C at +25°C and ±2°C over the −40°C to +125°C  temperature range.

The low output impedance of the TMP36 and  its linear output and precise calibration simplify interfacing to temperature control circuitry and ADC. The  sensing devices can be powered from a single-supply  of 2.7 V to 5.5 V. The supply current is less than 50µA,  providing very low self-heating effect, less than 0.1°C in  still air. In addition, a shutdown function is provided  to reduce supply current to less than 0.5 μA.

The TMP36 is specified from −40°C to  +125°C, provides a 750 mV output at 25°C, and  operates up to 125°C from a single 2.7 V supply.  The output scale factor of the TMP36 is 10 mV/°C.

The TMP112B is a digital temperature sensor with  high-accuracy, low-power, and NTC/PTC thermistor replacements. It can be used for extended temperature measurement in communication, computer, consumer electronics,environmental, industrial and instrumentation applications. The TMP112B provides ≤ ±0.5°C temperature accuracy with good temperature linearity over the normal  operating range of -40°C to +125°C.The TMP112B can provide extended temperature measurement mode, extending  the temperature measurement range from -55°C to  +150°C. 

The rated working voltage range of the TMP112B is  1.4V~5.5V, and the maximum quiescent current in the  entire working rage is 10µA (temperature measurement  frequency 4Hz).The on-chip 12-bit ADC offers resolutions  down to 0.0625°C. 

The TMP112B adopts SOT563 is compatible with  SMBus and I2C interface, and allows up to four devices  on one bus. The device also features an SMBus alert function.

The TMP112A is a digital temperature sensor with  high-accuracy, low-power, and NTC/PTC thermistor replacements. It can be used for extended temperature measurement in communication, computer, consumer electronics,environmental, industrial and instrumentation applications. The TMP112A provides ≤ ±0.5°C temperature accuracy with good temperature linearity over the normal  operating range of -40°C to +125°C.The TMP112A can provide extended temperature measurement mode, extending  the temperature measurement range from -55°Cto  +150°C. 

The rated working voltage range of the TMP112A  is 1.4V~5.5V, and the maximum quiescent current in  the entire working rage is 10µA (temperature measurement  frequency 4Hz).The on-chip 12-bit ADC offers resolutions  down to 0.0625°C. 

The TMP112A adopts SOT563 is compatible with  SMBus and I2C interface, and allows up to four devices  on one bus. The device also features an SMBus alert function.