Theoretically, up to 256 devices can be connected to a single 1-Wire bus, but in practice, the maximum number is limited by the bus capacitance, wire length, and noise tolerance. A typical limit is around 10-20 devices.
To ensure accurate temperature readings, make sure to follow proper PCB layout and thermal design guidelines, use a high-quality 1-Wire bus implementation, and perform temperature calibration during manufacturing or in the field.
Yes, the DS1822 supports multi-drop configuration, where multiple devices can be connected to the same 1-Wire bus. Each device has a unique 64-bit ROM code that allows the master device to address and communicate with individual DS1822 devices.
The DS1822 has a typical active supply current of 1.5mA and a standby current of 1μA. The device can be powered from the 1-Wire bus, eliminating the need for an external power supply.
Implement a robust 1-Wire protocol with error detection and retry mechanisms to handle errors due to noise, bus contention, or device faults. The DS1822 datasheet provides guidelines for error handling and retry strategies.
