Product Overview
The NS18B20 is a high-precision 1-Wire digital thermometer chip designed for temperature measurement within a range of -55C to +125C. It offers configurable digital conversion accuracy and measurement speed via a configuration register. The device features a built-in 5-byte non-volatile storage for user-defined information, including high/low temperature alarms and configuration accuracy. It supports both parasitic and external power supply modes, with the parasitic mode drawing power directly from the data line. Each NS18B20 possesses a unique 64-bit serial number, enabling multiple sensors to be controlled by a single processor on a shared bus. This makes it suitable for distributed temperature monitoring and control systems.
Product Attributes
- Brand: NOVOSENSE
- Interface: 1-Wire
- Package: TO-92
Technical Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units | Notes |
| Supply Voltage | VDD | Local Power | 2.7 | 5.5 | V | 1 | |
| Pullup Supply Voltage | VPU | 2.7 | 5.5 | V | 1.2 | ||
| Thermometer Error | Terr | -10 to 85 | 0.5 | ||||
| Thermometer Error | Terr | -55 to 125 | 1 | ||||
| Input Logic-Low | VIL | -0.3 | 0.75 | V | 1,3,4 | ||
| Input Logic-High | VIH | Local Power | 0.7*VDD | V | 1 | ||
| Input Logic-High | VIH | Parasite Power | 0.7*VDD | V | 1 | ||
| Sink Current | IL | VI/O=0.4V | 4.0 | mA | 1 | ||
| Standby Current | IDDS | 1.5 | uA | 5,6 | |||
| Active Current | IDD | VDD=3.3V | 26 | uA | 7 | ||
| DQ Input Current | IDQ | 5 | A | 8 | |||
| NV Write Cycle Time | tWR | Non-volatile storage write cycle | 10 | ms | |||
| EEPROM Data Retention | tEEDR | -55C to +55C | 10 | years | |||
| Temperature Conversion Time | tCONV | 9-bit resolution | 50 | ms | 1 | ||
| Temperature Conversion Time | tCONV | 10-bit resolution | 50 | ||||
| Temperature Conversion Time | tCONV | 11-bit resolution | 50 | ||||
| Temperature Conversion Time | tCONV | 12-bit resolution | 50 | ||||
| Time to Strong Pullup On Start Convert | T | Command Issued | 100 | s | |||
| Write EEPROM strong pull-up time | 10 | ms | |||||
| Time Slot | tSLOT | 60 | 120 | s | 1 | ||
| Recovery Time | tREC | 1 | s | 1 | |||
| Write 0 Low Time | tLOW0 | 60 | 120 | s | 1 | ||
| Write 1 Low Time | tLOW1 | 1 | 15 | s | 1 | ||
| Read Data Valid | tRDV | 15 | s | 1 | |||
| Reset Time High | tRSTH | 480 | s | 1 |
Applications
- Process monitoring and control system
- Industrial Internet of Things
- White goods
- Temperature monitoring
2410141004_NOVOSENSE-NS18B20-QTOS_C399507.pdf
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