Datasheet
LM95235
LM95235-Q1
www.ti.com
SNIS142F –APRIL 2006–REVISED MARCH 2013
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 LM95235. T
A
is the
ambient temperature of the LM95235. T
D
is the junction temperature of the remote thermal diode.
LM95235
LM95235 LM95235 EIMM
Typical CIMM DIMM LM95235
Parameter Test Conditions Unit
(1)
Limits Limits QEIMM
(2) (2)
Limits
(2)
Temperature Accuracy T
A
= 25°C to +100°C ±1 ±2 ±2 ±2 °C (max)
Using Local Diode
(3)
T
A
= -40°C to +25°C ±6.0 ±6.0 °C (max)
Temperature Accuracy T
A
= +25°C to +85°C;
65nm Intel Processor ±0.5 ±0.75 ±0.75 ±0.75 °C (max)
Using Remote Diode
(4)
T
D
= +60°C to +100°C
T
A
= +25°C to T
MAX
; MMBT3904 or
±0.5 ±1.0 ±1.0 ±1.0 °C (max)
T
D
= +60°C to +100°C 65nm Intel Processor
T
A
= +25°C to T
MAX
; MMBT3904 or
±0.75 ±1.5 ±1.5 ±1.5 °C (max)
T
D
= +40°C to +120°C 65nm Intel Processor
T
A
= -40°C to +25°C; MMBT3904 or
±3.0 °C (max)
T
D
= +25°C to +125°C 65nm Intel Processor
T
A
= -40°C to +25°C;
MMBT3904 ±3.0 °C (max)
T
D
= +25°C to +125°C
T
A
= -40°C to +25°C;
MMBT3904 ±5.0 ±5.0 °C (max)
T
D
= -40°C to +25°C
11 Bits
Digital Filter Off
0.125 °C
Remote Diode
Measurement Resolution
13 Bits
Digital Filter On
0.03125 °C
Local Diode Measurement 11 Bits
Resolution
0.125 °C
Conversion Time, Fastest Local and Remote Channels 63 72 72 72 ms (max)
Setting
(5)
Local or Remote Channels 33 ms
SMBus Inactive, 1 Hz conversion rate
(6)
350 650 650 650 µA (max)
Quiescent Current
Standby Mode 300 µA
D- Source Voltage 400 mV
High-level 172 225 225 225 µA (max)
External Diode Current
Source
Low-level 10.75 µA
Diode Source Current Ratio 16
2.8 2.8 2.8 V (max)
Power-On Reset Voltage
1.6 1.6 1.6 V (min)
T_CRIT Pin Temperature Default +110 °C
Threshold
OS Pin Temperature Default +85 °C
Threshold
(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 LM95235 and the thermal resistance. See
()
for the thermal resistance to be used in the self-heating
calculation.
(4) The accuracy of the LM95235 is guaranteed 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 LM95235 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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