APPLICATION NOTE 203

DS18B20-PAR/DS18S20-PAR/DS1822-PAR Advantages for Remote Temperature Sensing


Abstract: This application note describes how the DS18B20-PAR, DS18S20-PAR and DS1822-PAR temperature sensor integrated circuits (ICs) can greatly simplify the mechanical aspects of implementing parasite power in remote or probe type applications, as compared to the DS18B20, DS18S20 and DS1822. \"parasite power\" is a feature of most 1-Wire® devices, which allows them to derive power directly from the data line. The DS18B20, DS18S20 and DS1822 temperature sensors require that the VDD pin be connected to ground for parasite-power operation, which may require either a third wire or an awkward jumper connection. In the -PAR devices the need for this connection is eliminated.