LM95234 Series

±2°C Quad Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface

Catalog

±2°C Quad Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface

Part	Mounting Type	Voltage - Supply [Max]	Voltage - Supply [Min]	Resolution	Output Type	Package / Case	Test Condition [Min]	Test Condition [Max]	Supplier Device Package	Features	Sensing Temperature - Remote [Max]	Sensing Temperature - Remote [Min]	Accuracy - Highest (Lowest)	Sensing Temperature - Local [Max]	Sensing Temperature - Local [Min]	Operating Temperature [Max]	Operating Temperature [Min]
Texas Instruments LM95234CISD/NOPB	Surface Mount	3.6 V	3 V	10 b	SMBus	14-WFDFN Exposed Pad	-40 °C	125 °C	14-WSON (4x4)	One-Shot Output Switch Programmable Limit Shutdown Mode Standby Mode	125 °C	-40 °C	2 °C	125 °C	-40 °C	140 °C	-40 °C
Texas Instruments LM95234CISDX	Surface Mount	3.6 V	3 V	10 b	SMBus	14-WFDFN Exposed Pad	-40 °C	125 °C	14-WSON (4x4)	One-Shot Output Switch Programmable Limit Shutdown Mode Standby Mode	125 °C	-40 °C	2 °C	125 °C	-40 °C	140 °C	-40 °C
Texas Instruments LM95234CISDX/NOPB	Surface Mount	3.6 V	3 V	10 b	SMBus	14-WFDFN Exposed Pad	-40 °C	125 °C	14-WSON (4x4)	One-Shot Output Switch Programmable Limit Shutdown Mode Standby Mode	125 °C	-40 °C	0.2 °C	125 °C	-40 °C	140 °C	-40 °C

Catalog

±2°C Quad Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface

Key Features

• Accurately Senses Die Temperature of 4 Remote ICs or Diode Junctions and Local TemperatureTruTherm BJT Beta Compensation Technology Accurately Senses Sub-micron Process Thermal DiodesProgrammable Digital Filters and Analog Front End Filter0.125°C LSb Temperature Resolution0.03125°C LSb Remote Temperature Resolution with Digital Filter Enabled+127.875°C/–128°C and 0°C/255°C Remote RangesRemote Diode Fault Detection, Model Selection and Offset CorrectionMask and Status Register Support3 ProgrammableTCRITOutputs with Programmable Shared Hysteresis and Fault-QueueProgrammable Conversion Rate and Shutdown Mode One-shot Conversion ControlSMBus 2.0 Compatible Interface, Supports TIMEOUTThree-level Address Pin14-pin WSON PackageKey SpecificationsLocal Temperature Accuracy ±2.0°C (max)Remote Diode Temperature Accuracy ±0.875°C (max)Supply Voltage 3.0V to 3.6VAverage Supply Current (1Hz conversion rate)TruTherm is a trademark of Texas Instruments. All trademarks are the property of their respective owners.Accurately Senses Die Temperature of 4 Remote ICs or Diode Junctions and Local TemperatureTruTherm BJT Beta Compensation Technology Accurately Senses Sub-micron Process Thermal DiodesProgrammable Digital Filters and Analog Front End Filter0.125°C LSb Temperature Resolution0.03125°C LSb Remote Temperature Resolution with Digital Filter Enabled+127.875°C/–128°C and 0°C/255°C Remote RangesRemote Diode Fault Detection, Model Selection and Offset CorrectionMask and Status Register Support3 ProgrammableTCRITOutputs with Programmable Shared Hysteresis and Fault-QueueProgrammable Conversion Rate and Shutdown Mode One-shot Conversion ControlSMBus 2.0 Compatible Interface, Supports TIMEOUTThree-level Address Pin14-pin WSON PackageKey SpecificationsLocal Temperature Accuracy ±2.0°C (max)Remote Diode Temperature Accuracy ±0.875°C (max)Supply Voltage 3.0V to 3.6VAverage Supply Current (1Hz conversion rate)TruTherm is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

Description

LM95234 is an 11-bit digital temperature sensor with a 2-wire System Management Bus (SMBus) interface that can very accurately monitor the temperature of four remote diodes as well as its own temperature that includes patent pending remote diode TruTherm BJT beta compensation beta compensation technology. The four remote diodes can be external devices such as microprocessors, graphics processors or diode-connected 2N3904s. The LM95234's TruTherm BJT beta compensation technology allows sensing of 90 nm or 65 nm process thermal diodes accurately. The LM95234 reports temperature in two different formats for +127.875°C/–128°C range and 0°C/255°C range. The LM95234TCRIT1,TCRIT2andTCRIT3outputs are triggered when any unmasked channel exceeds its corresponding programmable 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 theTCRIT1,TCRIT2andTCRIT3pins can be read back from the status registers. Mask registers are available for further control of theTCRIToutputs. Two LM95234 remote temperature channels have programmable digital filters while the other two remote channels utilize a fault-queue to minimize unwantedTCRITevents when temperature spikes are encountered. For optimum flexibility and accuracy, each LM95234 channel includes registers for sub-micron process or 2N3904 diode model selection as well as offset correction. A three-level address pin allows connection of up to 3 LM95234s to the same SMBus master. The LM95234 includes power saving functions such as: programmable conversion rate, shutdown mode, and disabling of unused channels. LM95234 is an 11-bit digital temperature sensor with a 2-wire System Management Bus (SMBus) interface that can very accurately monitor the temperature of four remote diodes as well as its own temperature that includes patent pending remote diode TruTherm BJT beta compensation beta compensation technology. The four remote diodes can be external devices such as microprocessors, graphics processors or diode-connected 2N3904s. The LM95234's TruTherm BJT beta compensation technology allows sensing of 90 nm or 65 nm process thermal diodes accurately. The LM95234 reports temperature in two different formats for +127.875°C/–128°C range and 0°C/255°C range. The LM95234TCRIT1,TCRIT2andTCRIT3outputs are triggered when any unmasked channel exceeds its corresponding programmable 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 theTCRIT1,TCRIT2andTCRIT3pins can be read back from the status registers. Mask registers are available for further control of theTCRIToutputs. Two LM95234 remote temperature channels have programmable digital filters while the other two remote channels utilize a fault-queue to minimize unwantedTCRITevents when temperature spikes are encountered. For optimum flexibility and accuracy, each LM95234 channel includes registers for sub-micron process or 2N3904 diode model selection as well as offset correction. A three-level address pin allows connection of up to 3 LM95234s to the same SMBus master. The LM95234 includes power saving functions such as: programmable conversion rate, shutdown mode, and disabling of unused channels.