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LM95231 Datasheet(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM95231
Description  Precision Dual Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technology
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM95231 Datasheet(HTML) 7 Page - National Semiconductor (TI)

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Logic Electrical Characteristics (Continued)
Pin
#
Label
Circuit
Pin ESD Protection Structure Circuits
1
D1+
A
Circuit A
Circuit B
Circuit C
2
D1−
A
3
D2+
A
4
D2−
A
5
GND
B
6V
DD
B
7
SMBDAT
C
8
SMBCLK
C
Note 3: Thermal resistance junction-to-ambient when attached to a printed circuit board with 1oz. foil and no airflow:
– MSOP-8 = 210˚C/W
Note 4: Human body model, 100pF discharged through a 1.5k
Ω resistor. Machine model, 200pF discharged directly into each pin.
Note 5: Reflow temperature profiles are different for packages containing lead (Pb) than for those that do not.
Note 6: Typicals are at TA = 25˚C and represent most likely parametric norm at time of product characterization. The typical specifications are not guaranteed.
Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
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 internal power
dissipation of the LM95231 and the thermal resistance. See (Note 3) for the thermal resistance to be used in the self-heating calculation.
Note 9: The accuracy of the LM95231 is guaranteed when using the thermal diode of Pentium 4 processor on 90nm process or an MMBT3904 type transistor, as
selected in the Remote Diode Model Select register.
Note 10: Quiescent current will not increase substantially when the SMBus is active.
Note 11: This specification is provided only to indicate how often temperature data is updated. The LM95231 can be read at any time without regard to conversion
state (and will yield last conversion result).
Note 12: The output rise time is measured from (VIN(0)max + 0.15V) to (VIN(1)min − 0.15V).
Note 13: The output fall time is measured from (VIN(1)min - 0.15V) to (VIN(1)min + 0.15V).
Note 14: Holding the SMBDAT and/or SMBCLK lines Low for a time interval greater than tTIMEOUT will reset the LM95231’s SMBus state machine, therefore setting
SMBDAT and SMBCLK pins to a high impedance state.
www.national.com
7


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