LM95234 - 采用 TruTherm 技术且具有 SMBus 接口的 ±2°C 四路远程和本地温度传感器

LM95234是TI德州仪器公司的一款远程温度传感器产品，LM95234是采用 TruTherm 技术且具有 SMBus 接口的 ±2°C 四路远程和本地温度传感器，本站介绍了LM95234的封装应用图解、特点和优点、功能等，并给出了与LM95234相关的TI元器件型号供参考。

LM95234 - 采用 TruTherm 技术且具有 SMBus 接口的 ±2°C 四路远程和本地温度传感器 - 远程温度传感器 - 温度传感器和控制IC - 德州仪器

产品描述

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.

产品特性

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.

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