Product details

Local sensor accuracy (max) 2 Type Remote Operating temperature range (°C) -40 to 140 Supply voltage (min) (V) 2.7 Interface type I2C, SMBus Supply voltage (max) (V) 5.5 Features ALERT, One-shot conversion Supply current (max) (µA) 800 Temp resolution (max) (bps) 11 Remote channels (#) 4 Addresses 3 Rating Catalog
Local sensor accuracy (max) 2 Type Remote Operating temperature range (°C) -40 to 140 Supply voltage (min) (V) 2.7 Interface type I2C, SMBus Supply voltage (max) (V) 5.5 Features ALERT, One-shot conversion Supply current (max) (µA) 800 Temp resolution (max) (bps) 11 Remote channels (#) 4 Addresses 3 Rating Catalog
WSON (NHL) 14 16 mm² 4 x 4
  • Accurately Senses Die Temperature of 4 Remote ICs or Diode Junctions and Local Temperature
  • TruTherm BJT Beta Compensation Technology Accurately Senses Sub-micron Process Thermal Diodes
  • Programmable Digital Filters and Analog Front End Filter
  • 0.125°C LSb Temperature Resolution
  • 0.03125°C LSb Remote Temperature Resolution with Digital Filter Enabled
  • +127.875°C/–128°C and 0°C/255°C Remote Ranges
  • Remote Diode Fault Detection, Model Selection and Offset Correction
  • Mask and Status Register Support
  • 3 Programmable TCRIT Outputs with Programmable Shared Hysteresis and Fault-Queue
  • Programmable Conversion Rate and Shutdown Mode One-shot Conversion Control
  • SMBus 2.0 Compatible Interface, Supports TIMEOUT
  • Three-level Address Pin
  • 14-pin WSON Package

Key Specifications

  • Local Temperature Accuracy ±2.0°C (max)
  • Remote Diode Temperature Accuracy ±0.875°C (max)
  • Supply Voltage 3.0V to 3.6V
  • Average 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 Temperature
  • TruTherm BJT Beta Compensation Technology Accurately Senses Sub-micron Process Thermal Diodes
  • Programmable Digital Filters and Analog Front End Filter
  • 0.125°C LSb Temperature Resolution
  • 0.03125°C LSb Remote Temperature Resolution with Digital Filter Enabled
  • +127.875°C/–128°C and 0°C/255°C Remote Ranges
  • Remote Diode Fault Detection, Model Selection and Offset Correction
  • Mask and Status Register Support
  • 3 Programmable TCRIT Outputs with Programmable Shared Hysteresis and Fault-Queue
  • Programmable Conversion Rate and Shutdown Mode One-shot Conversion Control
  • SMBus 2.0 Compatible Interface, Supports TIMEOUT
  • Three-level Address Pin
  • 14-pin WSON Package

Key Specifications

  • Local Temperature Accuracy ±2.0°C (max)
  • Remote Diode Temperature Accuracy ±0.875°C (max)
  • Supply Voltage 3.0V to 3.6V
  • Average Supply Current (1Hz conversion rate)

TruTherm is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

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 LM95234 TCRIT1, TCRIT2 and TCRIT3 outputs 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 the TCRIT1, TCRIT2 and TCRIT3 pins can be read back from the status registers. Mask registers are available for further control of the TCRIT outputs.

Two LM95234 remote temperature channels have programmable digital filters while the other two remote channels utilize a fault-queue to minimize unwanted TCRIT events 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 LM95234 TCRIT1, TCRIT2 and TCRIT3 outputs 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 the TCRIT1, TCRIT2 and TCRIT3 pins can be read back from the status registers. Mask registers are available for further control of the TCRIT outputs.

Two LM95234 remote temperature channels have programmable digital filters while the other two remote channels utilize a fault-queue to minimize unwanted TCRIT events 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.

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Technical documentation

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Type Title Date
* Data sheet LM95234 Quad Remote Diode & Local Temp Sensor w/SMBus Interface &TruTherm Tech datasheet (Rev. D) 22 Mar 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Driver or library

LM95234SW-LINUX — Linux Driver for LM95234

The Linux driver supports the LM95234 series of Remote and Local Temp Sensors. The Linux driver supports communication through the I2C bus and interfaces with the Hardware Monitoring sub-system.
Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:
  • (...)
Support software

SENSOREVAL Eval Board Software For Hardware Monitors And Digital Temperature Sensors

SensorEval
SensorEval software supports the latest TI temperature sensor and hardware monitor evaluation boards via USB interface. It also allows access to sensors mounted directly on motherboards that support Intel chip sets.

  • Download SensorEval Software and Manual
  • Windows XP support is offered for (...)
Supported products & hardware

Supported products & hardware

Products
Digital temperature sensors
LM63 1 remote and local temperature sensor with fan control LM64 1 remote and local temp sensor with fan control and 5 GPIO's LM71 ±1.5°C Temperature Sensor with SPI Interface LM71-Q1 Automotive Grade, ±1.5°C Temperature Sensor with SPI Interface LM73 ±1°C Temperature Sensor with I2C/SMBus Interface LM75A 2C industry standard temperature sensor, I2C/SMBus interface LM86 ±0.75°C remote and local temperature sensor with SMBus interface LM89 ±0.75°C remote and local temperature sensor with SMBus interface and 2 addresses for bus sharing LM90 Remote and Local Temperature Sensor with SMBus Interface LM93 2 remote, 1 local temp sensor with hardware monitor and 16 power supply voltage monitors LM95010 ±2°C Temperature Sensor with SensorPath Interface LM95071 ±1°C Temperature Sensor with SPI Interface LM95172-Q1 Automotive Grade, ±1°C Temperature Sensor with 200°C Capability and SPI Interface LM95214 ±2°C Quad Remote and Local Temperature Sensor with SMBus Interface LM95221 ±3°C dual remote & local temperature sensor with beta compensation and SMBus, I2C LM95231 Dual Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface LM95233 ±2°C Dual Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface LM95234 ±2°C Quad Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface LM95235 ±0.75°C remote & local temperature sensor with SMBus, beta compensation for 65/90n LM95235-Q1 Automotive Grade, ±2°C Remote and Local Temperature Sensor with TruTherm Technology and SMBus LM95241 ±1.25°C dual remote & local temperature sensor with beta compensation and SMBus, I LM95245 ±0.75°C remote & local temperature sensor with SMBus, beta compensation for 45nm d LM96000 Hardware monitor with fan control and 6 power supply voltage monitors LM96080 1 local temp sensor with fan speed and power supply voltage monitor LM96163 1 remote and local temp sensor with beta compensation and fan control LM99 Remote and Local Temperature Sensor with TruTherm Technology and SMBus Interface
Precision ADCs
ADC128D818 12-Bit, 82SPS, 8-Ch Delta-Sigma ADC with Temp Sensor, INT / EXT Voltage Reference & I2C Interface
Package Pins CAD symbols, footprints & 3D models
WSON (NHL) 14 Ultra Librarian

Ordering & quality

Information included:
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  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

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