Rainbow-electronics DS1624 User Manual

1 of 16 072099FEATURES§ Temperature measurements require noexternal components§ Measures temperatures from -55°C to +125°Cin 0.03125°C increments.

DS162410 of 16During the programming cycle the DS1624 will not acknowledge any further accesses to the device untilthe programming cycle is complete (

DS162411 of 16BUS MASTERMODEDS1624MODEDATA (MSBFIRST)COMMENTS NOTESTX RX NACK Bus Master sends “NOACKNOWLEDGE” bit.TX RX STOP Bus Master initiates th

DS162412 of 16BUS MASTERMODEDS1624MODEDATA (MSBFIRST)COMMENTS NOTESRX TX <data> DS1624 sends the second byte of data.TX RX ACK Bus Master genera

DS162413 of 16RECOMMENDED DC OPERATING CONDITIONSPARAMETER SYMBOL MIN TYP MAX UNITS NOTESSupply Voltage VDD2.7 5.0 5.5 V 1DC ELECTRICAL CHARACTERISTIC

DS162414 of 16AC ELECTRICAL CHARACTERISTICS (-55°C to +125°C; VDD=2.7V to 5.5V)PARAMETERS SYMBOL CONDITION MIN TYP MAX UNITS NOTESTemperatureConversio

DS162415 of 16AC ELECTRICAL CHARACTERISTICS (-55°C to +125°C; VDD=2.7V to 5.5V)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESInput Capacitance CI5 pFNOTES:1

DS162416 of 16TYPICAL PERFORMANCE CURVEDS1624 DIGITAL THERMOMETER AND THERMOSTATTEMPERATURE READING ERRORTEMPERATURE (deg. C)

DS16242 of 16DETAILED PIN DESCRIPTION Table 1PIN SYMBOL DESCRIPTION1 SDA Data input/output pin for 2-wire serial communication port.2 SCL Clock input/

DS16243 of 162-WIRE SERIAL DATA BUSThe DS1624 supports a bi–directional two–wire bus and data transmission protocol. A device that sendsdata onto the

DS16244 of 16DATA TRANSFER ON 2-WIRE SERIAL BUS Figure 2Figure 2 details how data transfer is accomplished on the two–wire bus. Depending upon the sta

DS16245 of 16three least significant bits of the slave address. The last bit of the control byte (R/W) defines theoperation to be performed. When set

DS16246 of 16TEMPERATURE MEASURING CIRCUITRY Figure 4Internally, this calculation is performed by the DS1624 to provide 0.03125 °C resolution. The tem

DS16247 of 16Temperature is represented in the DS1624 in terms of a 0.03125 °C LSB, yielding the following 13–bitformat:OPERATION AND CONTROLA configu

DS16248 of 16PAGE PROGRAM MODETo program the DS1624 the master sends addresses and data to the DS1624 which is the slave. This isdone by supplying a

DS16249 of 16Access Memory [17h]This command instructs the DS1624 to access its E2 memory. After issuing this command, the next databyte is the value