Datasheet
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, T
MIN
≤ T
A
≤ T
MAX
-40°C ≤ T
A
≤ +85°C
Supply Voltage (V
DD
) +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 V
DD
= +3.0 Vdc to 3.6 Vdc. Boldface limits apply for T
A
= T
J
= T
MIN
≤
T
A
≤ T
MAX
; all other limits T
A
= T
J
= +25°C, unless otherwise noted. T
J
is the junction temperature of the LM95245. T
D
is the
junction temperature of the remote thermal diode.
Unit
Parameter Test Conditions Typ
(1)
Limits
(2)
(Limit)
Temperature Accuracy Using Local T
A
= 25°C to +100°C ±1 ±2 °C (max)
Diode
(3)
T
A
= -40°C to +25°C ±6 °C (max)
Temperature Accuracy Using Remote T
A
= +25°C to +85°C;
45nm Intel Processor ±0.5 ±0.75 °C (max)
Diode
(4)
T
D
= +50°C to +105°C
T
A
= +25°C to +85°C;
45nm Intel Processor ±0.75 ±1.5 °C (max)
T
D
= +40°C to +120°C
T
A
= -40°C to +25°C;
45nm Intel Processor ±3.0 °C (max)
T
D
= +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 T
A
= 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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