LM95245

www.ti.com

SNIS148G – OCTOBER 2007 – REVISED MARCH 2013

Operating Ratings

(1)

Operating Temperature Range

-40°C to +125°C

Electrical Characteristics Temperature Range, TMIN ≤ TA ≤ TMAX

-40°C

≤ TA ≤ +85°C

Supply Voltage (VDD)

+3.0V to +3.6V

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for

which the device is guaranteed to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test

conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance

characteristics may degrade when the device is not operated under the listed test conditions. Operation of the device beyond the

maximum Operating Ratings is not recommended.

Temperature-to-Digital Converter Characteristics

Unless otherwise noted, these specifications apply for VDD = +3.0 Vdc to 3.6 Vdc. Boldface limits apply for TA = TJ = TMIN ≤

TA ≤ TMAX; all other limits TA = TJ = +25°C, unless otherwise noted. TJ is the junction temperature of the LM95245. TD is the

junction temperature of the remote thermal diode.

Unit

Parameter

Test Conditions

Typ(1)

Limits(2)

(Limit)

Temperature Accuracy Using Local

TA = 25°C to +100°C

±1

±2

°C (max)

Diode(3)

TA = -40°C to +25°C

±6

°C (max)

Temperature Accuracy Using Remote

TA = +25°C to +85°C;

45nm Intel Processor

±0.5

±0.75

°C (max)

Diode(4)

TD = +50°C to +105°C

TA = +25°C to +85°C;

45nm Intel Processor

±0.75

±1.5

°C (max)

TD = +40°C to +120°C

TA = -40°C to +25°C;

45nm Intel Processor

±3.0

°C (max)

TD = +25°C to +125°C

11

Bits

Digital Filter Off

0.125

°C

Remote Diode Measurement Resolution

13

Bits

Digital Filter On

0.03125

°C

Local Diode Measurement Resolution

11

Bits

0.125

°C

Conversion Time, Fastest Setting(5)

Local and Remote Channels

63

72

ms (max)

Local or Remote Channels

33

ms

SMBus Inactive, 1 Hz conversion rate (6)

350

670

µA (max)

Quiescent Current

Standby Mode

300

µA

D

− Source Voltage

400

mV

High-level

172

225

µA (max)

External Diode Current Source

Low-level

10.75

µA

Diode Source Current Ratio

16

2.8

V (max)

Power-On Reset Voltage

1.6

V (min)

T_CRIT Pin Temperature Threshold

Default

+110

°C

OS Pin Temperature Threshold

Default

+85

°C

(1)

Typical figures are at TA = 25°C and represent most likely parametric norms at the time of product characterization. The typical

specifications are not guaranteed.

(2)

Limits are guaranteed to TI's AOQL (Average Outgoing Quality Level).

(3)

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 LM95245 and the thermal resistance. See () for the thermal resistance to be used in the self-heating

calculation.

(4)

The accuracy of the LM95245 is guaranteed when using a typical thermal diode of an Intel processor on a 45 nm process, as selected

in the Remote Diode Model Select register. See typical performance curve for performance with Intel processor on a 65nm or 90nm

process.

(5)

This specification is provided only to indicate how often temperature data is updated. The LM95245 can be read at any time without

regard to conversion state (and will yield last conversion result).

(6)

Quiescent current will not increase substantially when the SMBus is active.

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