Rainbow-electronics DS1620 User Manual

1 of 13 072099FEATURES§ Requires no external components§ Supply voltage range covers from 2.7V to5.5V§ Measures temperatures from -55°C to +125°Cin

DS162010 of 13WRITE DATA TRANSFER Figure 5RELATED APPLICATION NOTESThe following Application Notes can be applied to the DS1620. These notes can be ob

DS162011 of 13DC ELECTRICAL CHARACTERISTICS (-55°C to +125°C; VDD=2.7V to 5.5V)PARAMETER SYMBOL CONDITION MIN MAX UNITS NOTESThermometer Error TERR0°C

DS162012 of 13NOTES:1. All voltages are referenced to ground.2. Logic 1 voltages are specified at a source current of 1 mA.3. Logic 0 voltages are

DS162013 of 13TYPICAL PERFORMANCE CURVEDS1620 DIGITAL THERMOMETER AND THERMOSTATTEMPERATURE READING ERRORTEMPERATURE (deg. C)

DS16202 of 13User–defined temperature settings are stored in nonvolatile memory, so parts can be programmed prior toinsertion in a system, as well as

DS16203 of 13TEMPERATURE MEASURING CIRCUITRY Figure 2This calculation is done inside the DS1620 to provide 0.5°C resolution. The temperature reading i

DS16204 of 13words, with the most significant 7 bits being ignored or set to 0, as illustrated in Table 1. After the MSB,the DS1620 will output 0s.Not

DS16205 of 13boundary has been met or exceeded, or as part of a closed loop system it can be used to activate a heatingsystem and deactivate it when t

DS16206 of 13operation of the CLK/CONV pin is as a normal clock in concert with DQ and RST . This bit is stored innonvolatile E2 memory, capable of a

DS16207 of 13Write TH [01h]This command writes to the TH (HIGH TEMPERATURE) register. After issuing this command the nextnine clock cycles clock in th

DS16208 of 13DS1620 COMMAND SET Table 3INSTRUCTION DESCRIPTION PROTOCOL3-WIRE BUSDATA AFTERISSUINGPROTOCOL NOTESTEMPERATURE CONVERSION COMMANDSRead Te

DS16209 of 13FUNCTION EXAMPLEExample: CPU sets up DS1620 for continuous conversion and thermostatic function.CPU MODEDS1620 MODE(3-WIRE) DATA (LSB FIR