GX18B20

Product Introduction

The GX18B20 is a programmable-resolution single-bus digital temperature sensor. It provides 9-bit to 12-bit temperature measurements and supports communication via a single bus protocol, requiring only one signal line and one ground line. The device can operate in parasitic power mode, drawing power directly from the signal line, eliminating the need for an external power supply. Each GX18B20 features a unique 64-bit serial code, allowing multiple sensors to be connected on the same single bus for distributed temperature sensing networks. This architecture enables a single processor to monitor multiple GX18B20 devices spread over a large area.

Features

• Single-bus interface requires only one port pin for communication
• Unique 64-bit serial code per chip
• Multi-point distributed temperature measurement without external components
• Can be powered via data line; supply voltage range 2.5V to 5.5V
• Temperature measurement range: -55°C to +125°C (-67°F to +257°F)
• Accuracy of ±0.4°C within -10°C to +85°C range
• Temperature resolution selectable from 9 to 12 bits
• Conversion time less than 750ms at maximum 12-bit resolution
• User-defined non-volatile temperature alarm settings
• Alarm search command identifies and flags devices exceeding programmed temperature limits
• Strong ESD protection: HBM 8000V, MM 800V
• Available in MSOP8, SOP8, TO-92, TO-92S, and TO-92A packages

Applications

• Temperature control
• Industrial systems
• Consumer products
• Grain temperature monitoring
• Thermometers
• Any heat-sensing system

Specifications Table

To learn more, please download the PDF.