DS18B20U+

DS18B20U+ is a variant of Maxim/Dallas’ DS18B20 digital temperature sensor. It uses a 1-Wire interface and provides a digital temperature reading without an ADC.
Key points:
- Interface: 1-Wire. Can power from VDD (3–5V) or parasitically from the data line (with a pull-up).
- Range and resolution: -55°C to +125°C. 9–12 bit selectable resolution (0.5°C, 0.25°C, 0.125°C, or 0.0625°C per LSB at 12-bit).
- Accuracy: typical about ±0.5°C from -10°C to +85°C (varies by variant and process).
- Data: Reads temperature via a scratchpad memory; each device has a unique 64-bit ROM code (family code 0x28).
- Bus usage: Multiple DS18B20 devices can share a single 1-Wire bus with a single pull-up resistor.
- Package: Common options include TO-92 and waterproof probes (the “U+” variant often implies a specific packaging, e.g., waterproof probe—verify with datasheet).
- Applications: embedded microcontrollers (Arduino, ESP*, etc.), data loggers, IoT sensors.
Note: “U+” suffix varies by vendor; check the exact datasheet for your part’s packaging and accuracy.

Key features of DS18B20U+ (DS18B20 family):
- 1-Wire digital thermometer: single data line plus ground for communication.
- Temperature range: -55°C to +125°C.
- Resolution: 9–12 bits (0.5°C to 0.0625°C per LSB).
- Power options: VDD or parasite-power mode (no external supply needed in parasite mode).
- Programmable alarms: high/low TH and TL limits; supports alarm search on the bus.
- Unique 64-bit ROM ID for addressing multiple devices on one bus.
- Scratchpad memory: stores temperature reading, TH/TL, configuration, and CRC.
- Data integrity: CRC-8 check on read data.
- Conversion time varies with resolution (shorter at 9-bit, up to ~750 ms at 12-bit in standard mode).
- Packaging options typical for DS18B20 devices (e.g., TO-92), with U+ variants available.
Note: DS18B20U+ is compatible with the standard DS18B20 feature set; exact package/variant details may vary by supplier.

TO-92 3-pin plastic epoxy package (through-hole).

3 pins. Pins (left-to-right with flat face toward you): GND, DQ (1-Wire data I/O), VDD (supply). The DS18B20U+ uses VDD for power (3–5.5 V); DQ serves as the data line (and can power the device in parasite mode when VDD isn’t supplied).

- Manufacturer: Dallas Semiconductor (historically; the DS18B20 was theirs; the brand is now under Maxim Integrated, which is part of Analog Devices).
- What kind of company: A multinational semiconductor company that designs and manufactures integrated circuits (analog/digital sensors and mixed-signal ICs).

DS18B20U+ is an industrial-range 1-Wire digital temperature sensor. Common applications include:
- Industrial process monitoring and control
- HVAC/building automation
- Cold-chain and refrigeration monitoring
- Data-center environmental sensing
- Weather stations and environmental monitoring
- Agriculture and greenhouse climate control
- IoT sensors and remote logging