DS18B20
Manufacturer
Model
DS18B20
Category
The Mysentech DS18B20 is a precision digital temperature sensor designed for industrial and consumer applications requiring accurate temperature measurements between -55°C to 125°C. Its single Bus communication simplifies integration while maintaining ±0.5°C accuracy. The TO-92 packaging allows easy PCB integration but requires careful thermal management. Available in quantities from 1 to 1000 with bulk pricing discounts, it excels in cost-sensitive environments but lacks multi-point measurement capabilities.
Reference Pricing
Reference Stock
Specifications
| Accuracy | ±0.5℃ (-10℃ to +85℃), ±1.0℃ (-55℃ to +125℃) |
| Dimensions | 3.3mm x 4.7mm |
| Insulation Resistance | ≥1GΩ |
| Linearity | ±0.1% (-10℃ to +85℃), ±0.2% (-55℃ to +125℃) |
| Long-term Stability | ±0.1℃/year |
| Measurement Range | -55℃ to +125℃ |
| Operating Temperature Range | -55℃ to +125℃ |
| Output Signal Type | Digital Signal |
| Package Type | TO-92 |
| Response Time | 50ms (9-bit resolution), 100ms (10-bit resolution), 200ms (11-bit resolution), 400ms (12-bit resolution) |
| Supply Current | 750nA (standby), 1mA (operating) |
| Supply Voltage | 2.5V to 5.5V |
| Temperature Coefficient | ±0.1℃/℃ |
Function And Role
Core Function
Single Bus Digital Temperature Sensor with ±0.5°C accuracy
Key Characteristics
- -55°C~+125°C operating range
- 1.8V~5.5V supply voltage
- TO-92 packaging
- Single Bus communication protocol
- 200nA standby current
Application Domains
Basic Scenarios
- Household temperature monitoring
- Industrial equipment thermal management
- Automotive interior temperature sensing
Extended Scenarios
- Environmental monitoring systems
- Medical device temperature validation
- Building automation controls
Precautions
| Soldering | Ensure proper TO-92 packaging alignment and avoid excessive heat during soldering |
| Current Limit | Maximum continuous current: 5mA (transient pulses allowed) |
| Voltage Limit | Absolute maximum voltage: 7V (5.5V recommended operating range) |
| Thermal Management | Thermal time constant: 750ms (requires 10ms sampling interval for stable readings) |
| Storage | Moisture-sensitive component - store in dry environment below 85% RH |
| Risk Warnings |
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Alternative Model Params
- Temperature resolution (e.g., ±0.5°C vs ±1.0°C)
- Bus protocol compatibility (1-wire vs digital)
- Response time (750ms typical)
- Supply voltage range (1.8V~5.5V vs 3.3V~5.5V)
Design Recommendations
| Layout | Maintain 1cm spacing between sensor and heat sources |
| Thermal | Use 0603 packaging capacitors for decoupling |
| Compatibility | Optimal with 8/16-bit microcontrollers using 1-wire interface |
| Testing | Calibrate with calibrated thermocouple reference during design phase |
Market Positioning
| Strengths |
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| Weaknesses |
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