The LM95231 is a precision dual remote diode temperature sensor (RDTS) that uses Texas Instruments' TruTherm technology. The 2-wire serial interface of the LM95231 is compatible with SMBus 2.0. The LM95231 can sense three temperature zones, it can measure the temperature of its own die as well as two diode connected transistors. The LM95231 includes digital filtering and an advanced input stage that includes analog filtering and TruTherm technology that reduces processor-to-processor non-ideality spread. The diode connected transistors can be a “thermal diode” as found in Intel and AMD processors or can simply be a diode connected MMBT3904 transistor. TruTherm technology allows accurate measurement of “thermal diodes” found on small geometry processes, 90nm and below. The LM95231 supports user selectable thermal diode non-ideality of either a Pentium 4 processor on 90nm process or 2N3904.

The LM95231 resolution format for remote temperature readings can be programmed to be 11-bits signed or unsigned with the digital filtering disabled. When the filtering is enabled the resolution increases to 13-bits signed or unsigned. In the unsigned mode the LM95231 remote diode readings can resolve temperatures above 127°C. Local temperature readings have a resolution of 9-bits plus sign.

• Accurately Senses Die Temperature of Remote ICs or Diode Junctions
• Uses TruTherm Technology for Precision “Thermal Diode” Temperature Measurement
• Thermal Diode Input Stage with Analog Filtering
• Thermal Diode Digital Filtering
• Intel Pentium 4 Processor on 90nm Process or 2N3904 Non-ideality Selection
• Remote Diode Fault Detection
• On-board Local Temperature Sensing
• Remote Temperature Readings Without Digital Filtering:
  • 0.125°C LSb
  • 10-bits Plus Sign or 11-bits Programmable Resolution
  • 11-bits Resolves Temperatures Above 127 °C
• Remote Temperature Readings with Digital Filtering:
  • 0.03125°C LSb with Filtering
  • 12-bits Plus Sign or 13-bits Programmable Resolution
  • 13-bits Resolves Temperatures Above 127°C
• Local Temperature Readings:
  • 0.25°C
  • 9-bits Plus Sign
• Status Register Support
• Programmable Conversion Rate Allows User Optimization of Power Consumption
• Shutdown Mode One-shot Conversion Control
• SMBus 2.0 Compatible Interface, Supports TIMEOUT
• 8-pin VSSOP Package

Key Specifications

• Remote Temperature Accuracy ±0.75°C (max)
• Local Temperature Accuracy ±3.0°C (max)
• Supply Voltage 3.0V to 3.6V
• Supply Current 402μA (typ)

All trademarks are the property of their respective owners.

• Local sensor accuracy (Max) (+/- C)
• 3
• Type
• Remote
• Operating temperature range (C)
• 0 to 85
• Supply voltage (Min) (V)
• 3
• Interface type
• I2C, SMBus
• Supply voltage (Max) (V)
• 3.6
• Supply current (Max) (uA)
• 402
• Temp resolution (Max) (bits)
• 10
• Features
• One-shot conversion, ALERT
• Remote channels (#)
• 2
• Addresses
• 3
• Rating
• Catalog

LM95231的完整型号有：LM95231BIMM-1/NOPB、LM95231CIMM-1/NOPB、LM95231CIMM-2/NOPB、LM95231CIMM/NOPB、LM95231CIMMX/NOPB，以下是这些产品的关键参数及官网采购报价：

LM95231BIMM-1/NOPB，工作温度：0 to 85，封装：VSSOP (DGK)-8，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM95231BIMM-1/NOPB的批量USD价格：.961（1000+）

LM95231CIMM-1/NOPB，工作温度：0 to 85，封装：VSSOP (DGK)-8，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM95231CIMM-1/NOPB的批量USD价格：.961（1000+）

LM95231CIMM-2/NOPB，工作温度：0 to 85，封装：VSSOP (DGK)-8，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM95231CIMM-2/NOPB的批量USD价格：.961（1000+）

LM95231CIMM/NOPB，工作温度：0 to 85，封装：VSSOP (DGK)-8，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM95231CIMM/NOPB的批量USD价格：1.153（1000+）

LM95231CIMMX/NOPB，工作温度：0 to 85，封装：VSSOP (DGK)-8，包装数量MPQ：3500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM95231CIMMX/NOPB的批量USD价格：.961（1000+）

DIGITALTEMPSENSORSEVM-SW — 用于硬件监控器和数字温度传感器的评估板软件

Evaluation Board Software for Hardware Monitors and Digital Temperature Sensors

LM95241SW-LINUX — 用于 LM95241 的 Linux 驱动程序

Linux 驱动程序支持 LM95241 系列双路远程和本地温度传感器。Linux 驱动程序支持通过 I2C 总线进行通信，并可与硬件监测子系统接口连接。
Linux 主线状态

在 Linux 主线中提供：是
可通过 git.ti.com 获取：不适用

支持的器件:

• lm95231
• lm95241

Linux 源文件

与该器件关联的文件为：

drivers/hwmon/lm95241.c

源文件

drivers/hwmon/lm95241.c

启用驱动程序支持 使用“make menuconfig”（也可以使用“make xconfig”或“make nconfig”）配置内核 Menuconfig 位置 (...)

SENSOREVAL — 用于硬件监控器和数字温度传感器的评估板软件

SensorEval
SensorEval 软件支持通过 USB 接口连接的 TI 最新温度传感器和硬件监控器评估板。此外，该软件还允许访问直接安装在支持 Intel 芯片组的主板上的传感器。

• 下载 SensorEval 软件和手册
• 为以下各项提供 Windows XP 支持：
  • USB 评估板（LM93 除外）
  • Intel ICHx 接口（ADCS9888、LM32、LM40、LM41、LM71、LM95010 和 LM95071 除外）
  • “无硬件”模式支持在没有任何硬件的情况下运行软件