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DS18B20

1-Wire digital temperature sensor, -55 to +125C, +/-0.5C accuracy, TO-92

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制造商零件：

DS18B20

包装：

TO-92-3 / SOIC-8

品牌：
产品类别：
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说明

产品概览

The DS18B20 from onsemi (formerly Maxim Integrated) is a 1-Wire digital temperature sensor providing 9-bit to 12-bit Celsius temperature measurements over a -55C to +125C range. It communicates over a single data line (1-Wire protocol) and supports multiple sensors on the same bus. Packaged in TO-92, waterproof probe, or SOIC-8.

主要规格

Temperature Range -55C to +125C
Accuracy +/-0.5C (at -10C to +85C)
Resolution 9-bit to 12-bit (programmable)
Interface 1-Wire
电源电压 3.0V to 5.5V
Supply Current 1mA (active), 1uA (standby)
Conversion Time 750ms (12-bit)
包装 TO-92-3 / SOIC-8

特点

  • 1-Wire interface requires only one data line (plus ground)
  • No external components required
  • Parasitic power mode eliminates need for separate supply
  • Unique 64-bit serial code enables multi-sensor bus
  • Programmable resolution: 9 to 12 bits
  • Alarm functions with user-defined thresholds

应用

  • Industrial temperature monitoring
  • HVAC environmental control
  • Thermal management systems
  • Food safety and cold chain monitoring

The DS18B20 is a 1-Wire digital temperature sensor from onsemi that provides 9-bit to 12-bit Celsius temperature measurements. It communicates over a single data line using the Dallas 1-Wire protocol, enabling multiple sensors to share the same bus. Each device has a unique 64-bit serial code stored in on-board ROM, allowing individual addressing. The sensor operates from 3.0V to 5.5V and supports parasitic power mode where the device derives power from the data line, eliminating the need for a local supply. Over the -10C to +85C range, accuracy is +/-0.5C with 12-bit resolution providing 0.0625C increments.

The DS18B20 uses a bandgap temperature-sensing circuit whose output is digitized by a delta-sigma ADC. Temperature data is stored as a 16-bit two’s complement number in the scratchpad memory. The 1-Wire protocol uses a time-slot based signaling scheme where the master initiates communication with a reset pulse and the sensor responds with a presence pulse. Read and write operations use precise timing windows within each time slot. In parasitic power mode, the device charges an internal capacitor from the data line during high periods to power itself during low periods. The resolution is programmable from 9 bits (93.75ms conversion) to 12 bits (750ms conversion).

针脚 名称 功能
1 接地 地面
2 DQ 1-Wire data I/O
3 VDD Power supply (3.0-5.5V) or parasitic mode (connect to GND)
  • Multi-zone temperature monitoring with dozens of sensors on a single 1-Wire bus
  • Industrial cold chain and food safety monitoring with +/-0.5C accuracy
  • HVAC environmental control systems with alarm threshold functions
  • Embedded thermal management in battery packs and power electronics
模型 制造商 主要区别
DS18S20 onsemi 9-bit only, earlier version
DS1822 onsemi Economy version, +/-2C accuracy
LM35 TI Analog output, 10mV/C
TMP102 TI I2C interface, SOT-6
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质量保证

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

1. Authorized & Genuine Sourcing Promise

All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

2. Strict Full-batch Quality Inspection

We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

3. Industry Standard Compliance

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If any product is confirmed to have non-conformity quality problems due to our reasons after receipt, we provide free return, exchange and supplementary delivery services. Our professional quality team will also conduct root cause analysis to optimize our quality control process. We respond to quality feedback within 24 hours to resolve your worries efficiently.

联系我们

If you have inquiries about our quality standards, inspection procedures or product certification documents, please feel free to contact us:

 

Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

发货与付款

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

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    US Dollar (USD) is the default settlement currency. RMB is available for domestic customers.

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    We support flexible minimum order quantities for samples, small-batch and large-batch orders. All sample orders shall comply with the above shipping and payment policies.

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    All electronic components are packed with professional anti-static and shockproof materials. Original factory packaging is available for branded chips and integrated circuits.

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5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
  • Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
  • Business Hours: 09:00 – 18:00, Monday to Friday. Closed on weekends and official public holidays.
  • Notice: Please make an appointment via email or communication tools one day in advance, and present your order information upon pickup.

Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

服务与包装

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

Core Services

1. One-stop Sourcing & BOM Support

We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

3. Fast Quotation & Order Processing

Our customer service team responds promptly to inquiries and quotation requests. All in-stock orders will be processed within one working day. We provide stocking reservation services for long-term cooperative customers, effectively solving problems such as component shortages and unstable supply chains.

4. Professional Technical Support

Our senior engineer team provides free technical consultation, model selection guidance and original manufacturer datasheets. We assist customers in solving problems related to product R&D, circuit design and component application, providing reliable technical support for project progress.

5. Sourcing for Special Components

Relying on our global supply chain network, we professionally source scarce components, obsolete parts and customized special components to efficiently solve your procurement difficulties.

6. Global Logistics & Document Services

We cooperate with mainstream international logistics providers including DHL, FedEx, UPS and TNT to achieve fast global delivery. We can provide complete export documents such as customs declaration files, commercial invoices and packing lists to ensure smooth customs clearance for international shipments. Local pickup is also available for customers in Shenzhen, China.

Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

1. General Packaging Specifications

  • All components are packed separately to avoid damage caused by friction and collision;
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2. Classified Professional Packaging

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  • Original Factory Packaging: Integrated circuits of brands such as NXP are delivered with original reels, trays or tubes by default, retaining complete original packaging and adapting to automated SMT production lines.
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  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

3. Custom Packaging Services

We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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