Rainbow-electronics LM86 Manual do Utilizador

LM86±0.75˚C Accurate, Remote Diode and Local DigitalTemperature Sensor with Two-Wire InterfaceGeneral DescriptionThe LM86 is an 11-bit digital tempera

1.0 Functional Description (Continued)Temperature Digital OutputBinary Hex+125˚C 0111 1101 0000 0000 7D00h+25˚C 0001 1001 0000 0000 1900h+1˚C 0000 000

1.0 Functional Description (Continued)1.9.1 SMBus Timing Diagrams1.10 SERIAL INTERFACE RESETIn the event that the SMBus Master is RESET while theLM86

1.0 Functional Description (Continued)D2 D1 Filter0 0 No Filter0 1 Level 11 0 Level 11 1 Level 2Level 2 sets maximum filtering.Figure 8 depict the fil

1.0 Functional Description (Continued)1.12 Fault QueueIn order to suppress erroneous ALERT or T_CRIT triggeringthe LM86 incorporates a Fault Queue. Th

2.0 LM86 REGISTERS (Continued)Command Select Address Power On Default State RegisterNameRegister FunctionRead Address<P7:P0>hexWrite Address<

2.0 LM86 REGISTERS (Continued)2.4 CONFIGURATION REGISTER(Read Address 03h /Write Address 09h):D7 D6 D5 D4 D3 D2 D1 D0ALERT mask RUN/STOP 0 RemoteT_CRI

2.0 LM86 REGISTERS (Continued)For RLSLB: Remote HIGH Setpoint Low Byte temperature data. Power up default is 0˚C. 1LSB = 0.125˚C. Two’s complementform

3.0 Application Hints (Continued)pins, its temperature will effectively be that of the printedcircuit board lands and traces soldered to the LM86’s pi

3.0 Application Hints (Continued)mobile Pentium III processor, 1.008. When a temperaturesensor calibrated for a particular processor type is used with

3.0 Application Hints (Continued)3.2 PCB LAYOUT for MINIMIZING NOISEIn a noisy environment, such as a processor mother board,layout considerations are

Connection DiagramMSOP-8 or SOIC-810130302TOP VIEWOrdering InformationPackageMarkingNS PackageNumberTransportMediaLM86CIMM T10C MUA08A(MSOP-8)1000 Uni

Physical Dimensions inches (millimeters)unless otherwise noted8-Lead (0.150" Wide) Molded Narrow Small-Outline Package (SOIC),JEDEC Registration

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)8-Lead Molded Mini-Small-Outline Package (MSOP),JEDEC Registration Number M

Typical Application10130303LM86www.national.com3

Absolute Maximum Ratings (Note 1)Supply Voltage −0.3 V to 6.0 VVoltage at SMBData, SMBCLK,ALERT, T_CRIT_A−0.5V to 6.0VVoltage at Other Pins −0.3 V to(

Temperature-to-Digital Converter Characteristics (Continued)Unless otherwise noted, these specifications apply for VDD=+3.0Vdc to 3.6Vdc. Boldface lim

SMBus DIGITAL SWITCHING CHARACTERISTICS Unless otherwise noted, these specifications apply for VDD=+3.0 Vdc to+3.6 Vdc, CL(load capacitance) on output

Note 8: Local temperature accuracy does not include the effects of self-heating. The rise in temperature due to self-heating is the product of the int

1.0 Functional Description (Continued)no longer present, the ALERT is de-asserted (Figure 3). Forexample, if the ALERT output was activated by the com

1.0 Functional Description (Continued)1. Master Senses SMBus alert line low2. Master sends a START followed by the Alert ResponseAddress (ARA) with a