LM95235
LM95235-Q1
www.ti.com
SNIS142F –APRIL 2006–REVISED MARCH 2013
Precision Remote Diode Temperature Sensor with SMBus Interface and TruTherm™
Technology
Check for Samples: LM95235, LM95235-Q1
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FEATURES
KEY SPECIFICATIONS
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Remote and Local Temperature Channels
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Supply Voltage 3.0 to 3.6 V
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TruTherm BJT Beta Compensation Technology
Supply Current, Conv. Rate = 1 Hz 350 µA (typ)
Remote Diode Temperature Accuracy
LM95235Q is AEC-Q100 Grade 3 Compliant
and is Manufactured on an Automotive Grade
Flow
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TA = 25°C to 85°C; TD = 60°C to 100°C, ±0.75
°C (max)
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Diode Model Selection Bit - MMBT3904 or
65/90-nm Processor Diodes
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TA = 25°C to 90°C; TD = 40°C to 125°C, ±1.5
°C (max)
Two Formats: -128°C to 127.875°C and 0°C to
255.875°C
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Local Temperature Accuracy
TA = 25°C to 100°C, ±2.0 °C (max)
Conversion Rate, Both Channels 16 to 0.4 Hz
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Digital Filter for Remote Channel
Programmable TCRIT and OS Thresholds
Programmable Shared Hysteresis Register
Diode Fault Detection
DESCRIPTION
The LM95235 is an 11-bit digital temperature sensor
with a 2-wire System Management Bus (SMBus)
interface and TruTherm technology that can monitor
the temperature of a remote diode as well as its own
temperature. The LM95235 can be used to very
accurately monitor the temperature of external
Mask, Offset, and Status Registers
SMBus 2.0 Compatible Interface, Supports
TIMEOUT
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Programmable Conversion Rate for Best
Power Consumption
devices
processors, or
such
as
a
microprocessors,
diode-connected MMBT3904
graphics
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Three-Level Address Pin
transistor. For automotive applications the LM95235Q
is available that is AEC-Q100 Grade3 compliant and
is manufactured on an Automotive Grade Flow.
TruTherm BJT (transistor) beta compensation
technology allows the LM95235 to precisely monitor
thermal diodes found in 90 nm and smaller geometry
processes. LM95235 reports temperature in two
different formats for +127.875°C/-128°C range and
0°C/255°C range. The LM95235 T_CRIT and OS
outputs are asserted when either unmasked channel
exceeds its programmed limit and can be used to
shutdown the system, to turn on the system fans, or
as a microcontroller interrupt function. The current
status of the T_CRIT and OS pins can be read back
from the status registers via the SMBus interface. All
Standby Mode One-Shot Conversion Control
Pin-for-Pin Compatible With the LM86 and
LM89
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8-Pin VSSOP Package
APPLICATIONS
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Processor/Computer System Thermal
Management (For Example, Laptops,
Desktops, Workstations, Servers)
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Electronic Test Equipment and Office
Electronics
limits have
register.
a shared programmable hysteresis
The remote temperature channel of the LM95235 has
a programmable digital filter. The LM95235 contains
a diode model selection bit to select between a
typical Intel® processor on a 65 nm or 90 nm process
or MMBT3904, as well as an offset register for
maximum flexibility and best accuracy.
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2
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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