LM86 National Semiconductor, LM86 Datasheet
LM86
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LM86 Summary of contents
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... LOW temperature limit registers or exceeds the T_CRIT temperature limit. Activation of the T_CRIT_A occurs when any temperature exceeds the T_CRIT programmed limit. The LM86 is pin and register compatible with the the Analog Devices ADM1032 and Maxim MAX6657/8. Features n Accurately senses die temperature of remote ICs or ...
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... TOP VIEW Package NS Package Marking Number T10C MUA08A (MSOP-8) T10C MUA08A (MSOP-8) LM86CIM M08A (SOIC-8) LM86CIM M08A (SOIC-8) Function Positive Supply Voltage DC Voltage from 3 3.6 V Input Diode Current Source To Diode Anode. Connected to remote discrete diode conected transistor junction or to the diode connected transistor junction on a remote IC whose die temperature is being sensed ...
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Typical Application 3 10130303 www.national.com ...
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... V) DD Operating Ratings ± (Notes 1, 5) ± Operating Temperature Range 30 mA Electrical Characteristics Temperature Range 10 mA LM86 −65˚C to Supply Voltage Range (V +150˚C =+3.0Vdc to 3.6Vdc. Boldface limits apply for T DD =+25˚C, unless otherwise noted. J Conditions T = +25˚C to +125˚C, (Note +30˚ ...
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... Boldface limits apply for +25˚C, unless otherwise noted. The switching characteristics of the LM86 fully meet or exceed the published specifi cations of the SMBus version 2.0. The following parameters are the timing relationships between SMBCLK and SMBData sig- nals related to the LM86 ...
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... I Parasitic components and or ESD protection circuitry are shown in the figure below for the LM86’s pins. The nominal breakdown voltage 6.5 V. Care should be taken not to forward bias the parasitic diode, D1, present on pins: D+, D−. Doing so by more than 50 mV may corrupt a temperature measurements. ...
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... LM86 and the thermal resistance. See (Note 5) for the thermal resistance to be used in the self-heating calculation. Note 9: Quiescent current will not increase substantially with an SMBus. Note 10: This specification is provided only to indicate how often temperature data is updated. The LM86 can be read at any time without regard to conversion state (and will yield last conversion result). ...
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... Under this method of operation, during a read of the STATUS REGISTER the LM86 will set the ALERT mask bit (D7 of the Configuration register) if any bit in the STATUS REGISTER is set, with the exception of Busy (D7) and OPEN (D2) ...
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... Conversion Rate Register set to 8h; conversion rate set to 16 conv./sec. 1.5 SMBus INTERFACE The LM86 operates as a slave on the SMBus, so the SMBCLK line is an input and the SMBData line is bi- 10130329 directional. The LM86 never drives the SMBCLK line and it does not support clock stretching ...
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... Register. At power-up the Command Register is set to “00”, the location for the Read Local Temperature Register. Hex The Command Register latches the last location it was set 7Dh to. Each data register in the LM86 falls into one of four types of user accessibility: 19h 1. Read only 01h 2 ...
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... Serial Bus Read from a Register with the Internal Command Register preset to desired value. 1.10 SERIAL INTERFACE RESET In the event that the SMBus Master is RESET while the LM86 is transmitting on the SMBData line, the LM86 must be returned to a known state in the communication protocol. This may be done in one of two ways: 1 ...
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Functional Description a)Step Response FIGURE 9. Digital Filter Response in a Pentium 4 processor System. The filter on and off curves were purposely www.national.com Level 2 sets maximum filtering. ...
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... Functional Description 1.12 Fault Queue In order to suppress erroneous ALERT or T_CRIT triggering the LM86 incorporates a Fault Queue. The Fault Queue acts to insure a remote temperature measurement is genuinely beyond a HIGH, LOW or T_CRIT setpoint by not triggering until three consecutive out of limit measurements have been made, see Figure 10 ...
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... LM86 REGISTERS Command Select Address Read Address Write Address < > < > P7:P0 hex P7:P0 hex 11h 11h 12h 12h 13h 13h 14h 14h 19h 19h 20h 20h 21h 21h B0h-BEh B0h-BEh BFh BFh FEh NA FFh NA 2.2 LOCAL and REMOTE TEMPERATURE REGISTERS (LT, RTHB, RTLB) ...
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... LM86 REGISTERS 2.4 CONFIGURATION REGISTER (Read Address 03h /Write Address 09h ALERT mask RUN/STOP Power up default is with all bits “0” (zero) D7: ALERT mask: When set to “1” ALERT interrupts are masked. D6: RUN/STOP: When set to “1” SHUTDOWN is enabled. D5: is not defined and defaults to “0”. ...
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... Address FFh) Default value 11hexadecimal or 17 decimal. This register will increment by 1 every time there is a revision to the die by National Semiconductor. 3.0 Application Hints The LM86 can be applied easily in the same way as other integrated-circuit temperature sensors, and its remote diode www.national.com ...
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... In order to compensate for the errors introduced by non- ideality, the temperature sensor is calibrated for a particular processor. National Semiconductor temperature sensors are always calibrated to the typical non-ideality of a given pro- cessor type. The LM86 is calibrated for the non-ideality −19 Coulombs (the electron charge), − ...
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Application Hints mobile Pentium III processor, 1.008. When a temperature sensor calibrated for a particular processor type is used with a different processor type or a given processor type has a non-ideality that strays from the typical, errors are ...
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... Noise induced on traces running between the remote temperature diode sen- sor and the LM86 can cause temperature conversion errors. Keep in mind that the signal level the LM86 is trying to measure is in microvolts. The following guidelines should be followed: 1. Place a 0.1 µ ...
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... Physical Dimensions unless otherwise noted 8-Lead (0.150" Wide) Molded Narrow Small-Outline Package (SOIC), www.national.com inches (millimeters) JEDEC Registration Number MS-012 Order Number LM86CIM or LM86CIMX NS Package Number M08A 20 ...
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... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) unless otherwise noted (Continued) JEDEC Registration Number MO-187 Order Number LM86CIMM or LM86CIMMX NS Package Number MUA08A 2. A critical component is any component of a life ...