The LM95221 is a dual remote diode temperature sensor in an 8-lead VSSOP package. The 2-wire serial interface of the LM95221 is compatible with SMBus 2.0. The LM95221 can sense three temperature zones, it can measure the temperature of its own die as well as two diode connected transistors. The diode connected transistors can be a thermal diode as found in Pentium and AMD processors or can simply be a diode connected MMBT3904 transistor. The LM95221 resolution format for remote temperature readings can be programmed to be 10-bits plus sign or 11-bits unsigned. In the unsigned mode the LM95221 remote diode readings can resolve temperatures above 127°C. Local temperature readings have a resolution of 9-bits plus sign.

The temperature of any ASIC can be accurately determined using the LM95221 as long as a dedicated diode (semiconductor junction) is available on the target die. The LM95221 remote sensor accuracy of ±1°C is factory trimmed for a series resistance of 2.7 ohms and 1.008 non-ideality factor.

• Accurately Senses Die Temperature of Remote ICs or Diode Junctions
• Remote Diode Fault Detection
• On-board Local Temperature Sensing
• Remote Temperature Readings
  • 0.125°C LSb
  • 10-bits Plus Sign or 11-bits Programmable Resolution
  • 11-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

• Local Temperature Accuracy
  • TA = 0°C to 85°C ± 3.0°C (max)
• Remote Diode Temperature Accuracy
  • TA = 30°C to 50°C, TD = 45°C to 85°C ±1.0 °C (Max)
  • TA = 0°C to 85°C, TD = 25°C to 140°C ±3.0°C (Max)
• Supply Voltage 3.0 V to 3.6 V
• Supply Current 2 mA (Typ)

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• 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)
• 2600
• Temp resolution (Max) (bits)
• 10
• Features
• One-shot conversion, ALERT
• Remote channels (#)
• 2
• Addresses
• 1
• Rating
• Catalog

LM95221的完整型号有：LM95221CIMM/NOPB、LM95221CIMMX/NOPB，以下是这些产品的关键参数及官网采购报价：

LM95221CIMM/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LM95221CIMM/NOPB的批量USD价格：1.276（1000+）

LM95221CIMMX/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LM95221CIMMX/NOPB的批量USD价格：1.063（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

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