Rainbow-electronics LM84 Manual de usuario Pagina 1

LM84Diode Input Digital Temperature Sensor with Two-WireInterfaceGeneral DescriptionThe LM84 is a remote diode temperature sensor,Delta-Sigma analog-t

1.0 Functional Description (Continued)1.3 SMBus INTERFACEThe LM84 operates as a slave on the SMBus, so theSMBCLK line is an input (no clock is generat

1.0 Functional Description (Continued)1.7 COMMUNICATING with the LM84There are 10 data registers in the LM84, selected by theCommand Register. At powe

1.0 Functional Description (Continued)1.8 LM84 REGISTERS1.8.1 COMMAND REGISTERSelects which registers will be read from or written to. Data for this r

1.0 Functional Description (Continued)1.8.6 LOCAL AND REMOTE T_CRIT REGISTERS(Read/Write):D7 D6 D5 D4 D3 D2 D1 D0MSB Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit

3.0 Application HintsThe LM84 can be applied easily in the same way as otherintegrated-circuit temperature sensors, and its remote diodesensing capabi

3.0 Application Hints (Continued)7. The ideal place to connect the LM84’s GND pin is asclose as possible to the Processors GND associatedwith the sens

Physical Dimensions inches (millimeters) unless otherwise notedLIFE SUPPORT POLICYNATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENT

Connection DiagramOrdering InformationOrderNumberNSPackageNumberTransportMediaSMBusRevisionLevelNoise Filteron SMBCLKLM84BIMQAMQA16A(QSOP-16)95 Units

Pin DescriptionsLabel Pin#Function Typical ConnectionNC1, 5, 9,13, 16Manufacturing test pins. Left floating. PC board traces may be routedthrough the

Absolute Maximum Ratings (Note 1)Supply Voltage −0.3V to 6.0VVoltage at Any Pin:NC (Pins 1,5,9), ADD0, ADD1, D+−0.3V to(VCC+ 0.3V)All other pins (exce

Logic Electrical CharacteristicsDIGITAL DC CHARACTERISTICSUnless otherwise noted, these specifications apply for VCC=+3.0 to 3.6 Vdc. Boldface limits

Logic Electrical Characteristics (Continued)SMBus DIGITAL SWITCHING CHARACTERISTICSUnless otherwise noted, these specifications apply for VCC=+3.0 Vdc

Logic Electrical Characteristics (Continued)SMBus TIMEOUTDS100961-13LM84www.national.com7

Logic Electrical Characteristics (Continued)Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC el

Logic Electrical Characteristics (Continued)1.0 Functional DescriptionThe LM84 temperature sensor incorporates a band-gap typetemperature sensor using