Product Overview
The MYDS18B20 series is a digital mixed-signal temperature sensing chip offering high accuracy and ease of use. It features a measurement accuracy of 0.5C within the -10C to +85C range, eliminating the need for user calibration. Based on CMOS semiconductor PN junction temperature and bandgap voltage characteristics, it provides high precision, good consistency, low power consumption, flexible programmable configuration, and a long lifespan. The chip integrates a 14-bit ADC with a resolution of 0.0125C, with a default factory configuration of 12-bit ADC and an operating range of -55C to +125C. Each chip is 100% tested and calibrated at the factory. Its digital single-bus protocol simplifies system integration, requiring only one GPIO port for microprocessors to access ID search, temperature data memory, and function configuration. The single-bus interface supports low-cost, multi-node sensing and networking solutions with long transmission distances and a high number of supported nodes, up to 100 nodes in series over 100 to 500 meters. The chip includes non-volatile E2PROM for storing ID numbers, high/low temperature alarm thresholds, calibration coefficients, and user-defined information. Available in TO-92, TO-92S, SOP8, and MSOP8 packages.
Product Attributes
- Brand: Mysentech
- Origin: China (Implied by website domain and language)
- Communication Protocol: Single-Bus
- Technology: CMOS Mixed-Signal
Technical Specifications
| Feature | Specification | Details |
|---|---|---|
| Measurement Accuracy | 0.5C | -10C to +85C |
| Typical Accuracy (Other Ranges) | 1.5C | |
| Temperature Range | -55C to +125C | |
| Low Power Consumption | 0.2A (Standby @ 5V) | 5A (Average @ 1Hz) |
| Operating Voltage Range | 1.8V to 5.5V | |
| Temperature Resolution | 12-bit ADC (0.0625C) | Configurable to 14-bit ADC (0.0125C) |
| Temperature Conversion Time | Configurable | 500ms / 15ms |
| User E2PROM Space | 80 bits | For user information |
| Unique ID | 64-bit Serial Number | For multi-point networking |
| Alarm Function | User-settable high/low alarm values | |
| Interface | Standard Single-Bus | Suitable for distributed multi-point sensing |
| Max. Nodes (Series) | 100 | Up to 500 meters cable length |
| Package Types | TO-92 (18B20), TO-92S (18B20S), SOP8 (18B20Z), MSOP8 (18B20U) | |
| Applications | Industrial Monitoring, Smart Hardware, Smart Agriculture, Instrumentation, Smart Home Appliances, Multi-point Series Temperature Measurement | |
| Pin Configuration | GND, DQ, VDD | (Specific pinouts vary by package) |
| Internal Structure | 64-bit ROM, Temperature Registers, Alarm Threshold Registers (TH, TL), Configuration Register, User E2PROM | |
| Power Modes | External Power Mode, Parasitic Power Mode | |
| Non-Volatile Memory Write Cycle | 40 ms (Max) | |
| E2PROM Write Cycles | 50,000 times | -55C to +55C |
| E2PROM Data Retention | 10 years | -55C to +55C |
| Temperature Conversion Time (tCONV) | 15ms to 500ms | Depends on resolution |
| Slot Time (tSLOT) | 60s (Min) | |
| Reset Low Time (tRSTL) | 480s (Min) | |
2506181051_Mysentech-DS18B20Z-MY_C41361411.pdf
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