LM95241

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SNIS143E – AUGUST 2006 – REVISED MARCH 2013

Temperature-to-Digital Converter Characteristics

junction temperature of the remote thermal diode.

Parameter

Conditions

Units

(Limit)

Accuracy Using Local Diode

(3)

±1

±3

°C (max)

±1.25

°C (max)

Diode Processor Type.

+40°C

+85°C

±2.5

°C (max)

+140°C

Remote Diode Measurement Resolution with

10+sign/11

Bits

filtering turned off

0.125

°C

Remote Diode Measurement Resolution with digital

12+sign/13

Bits

filtering turned on

0.03125

°C

Local Diode Measurement Resolution

9+sign

Bits

0.25

°C

Conversion Time of All Temperatures at the Fastest

TruTherm Mode Disabled for All

76.5

86.1

ms (max)

Remote Channels

TruTherm Mode Enabled for All

79.1

88.9

ms (max)

Remote Channels

SMBus Inactive, 1 Hz conversion

471

640

µA (max)

rate

Shutdown

356

µA

D

− Source Voltage

0.4

V

Diode Source Current Ratio

16

Diode Source Current

172

230

µA (max)

100

µA (min)

Low-level

11

µA

Power-On Reset Threshold

2.7

V (max)

1.6

V (min)

(1)

specifications are not ensured.

(2)

Limits are specified to Texas Instruments' 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 LM95241 and the thermal resistance. See Note 2 of the Operating Ratings table for the thermal

resistance to be used in the self-heating calculation.

(4)

The accuracy of the LM95241CIMM is ensured when using a typical thermal diode of an Intel processor on a 65 nm process or an

MMBT3904 diode-connected transistor, as selected in the Remote Diode Model Select register. See typical performance curve for

performance with Intel processor on a 90nm process.

(5)

This specification is provided only to indicate how often temperature data is updated. The LM95241 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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