The LM73 is an integrated, digital-output temperature sensor featuring an incremental Delta-Sigma ADC with a two-wire interface that is compatible with the SMBus and I²C interfaces. The host can query the LM73 at any time to read temperature.

Available in a 6-pin SOT package, the LM73 occupies very little board area while operating over a wide temperature range (–40°C to 150°C) and providing ±1°C accuracy from –10°C to 80°C. The user can optimize between the conversion time and the sensitivity of the LM73 by programming it to report temperature in any of four different resolutions. Defaulting to 11-bit mode (0.25°C/LSB), the LM73 measures temperature in a maximum time of 14 ms, making it ideal for applications that require temperature data very soon after power-up. In its maximum resolution, 14-bit mode (0.03125°C/LSB), the LM73 is optimized to sense very small changes in temperature.

A single multi-level address line selects one of three unique device addresses. An open-drain ALERT output goes active when the temperature exceeds a programmable limit. Both the data and clock lines are filtered for excellent noise tolerance and reliable communication. Additionally, a time-out feature on the clock and data lines causes the LM73 to automatically reset these lines if either is held low for an extended time, thus exiting any bus lock-up condition without processor intervention.

• Single Address Pin Offers Choice of Three Selectable Addresses Per Version for a Total of Six Possible Addresses.
• SMBus and I2C-compatible Two-Wire Interface
• Supports 400-Khz Operation
• Shutdown Mode With One-shot Feature Available for Very Low Average Power Consumption
• Programmable Digital Temperature Resolution From 11 Bits to 14 Bits
• Fast Conversion Rate Ideal for Quick Power Up and Measuring Rapidly Changing Temperature
• Open-Drain ALERT Output Pin Goes Active When Temperature is Above a Programmed Temperature Limit
• Very Stable, Low-noise Digital Output
• UL Recognized Component
• Key Specifications
  • ?Supply Current
    • Operating
      • 320 μA (Typical)
      • 495 μA (Maximum)
    • Shutdown
      • 8 μA (Maximum)
      • 1.9 μA (Typical)
  • Temperature Accuracy
    • ?10°C to 80°C: ±1.0°C (Maximum)
    • ?25°C to 115°C: ±1.5°C (Maximum)
    • ?40°C to 150°C: ±2°C (Maximum)
  • Resolution
    • 0.25°C to 0.03125°C
  • Conversion Time
    • 11-Bit (0.25°C): 14 ms (Maximum)
    • 14-Bit (0.03125°C): 112 ms (Maximum)

• Local sensor accuracy (Max) (+/- C)
• 1
• Type
• Local
• Operating temperature range (C)
• -40 to 150
• Supply voltage (Min) (V)
• 2.7
• Interface type
• I2C, SMBus
• Supply voltage (Max) (V)
• 5.5
• Supply current (Max) (uA)
• 550
• Temp resolution (Max) (bits)
• 14
• Features
• ALERT, One-shot conversion, UL recognized
• Remote channels (#)
• 0
• Addresses
• 6
• Rating
• Catalog

LM73的完整型号有：LM73CIMK-0/NOPB、LM73CIMK-1/NOPB、LM73CIMKX-0/NOPB、LM73CIMKX-1/NOPB，以下是这些产品的关键参数及官网采购报价：

LM73CIMK-0/NOPB，工作温度：-40 to 150，封装：SOT-23-THIN (DDC)-6，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：NIPDAU，TI官网LM73CIMK-0/NOPB的批量USD价格：1.205（1000+）

LM73CIMK-1/NOPB，工作温度：-40 to 150，封装：SOT-23-THIN (DDC)-6，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：NIPDAU，TI官网LM73CIMK-1/NOPB的批量USD价格：1.205（1000+）

LM73CIMKX-0/NOPB，工作温度：-40 to 150，封装：SOT-23-THIN (DDC)-6，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网LM73CIMKX-0/NOPB的批量USD价格：1.004（1000+）

LM73CIMKX-1/NOPB，工作温度：-40 to 150，封装：SOT-23-THIN (DDC)-6，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网LM73CIMKX-1/NOPB的批量USD价格：1.004（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

LM73SW-LINUX — 用于 LM73 的 Linux 驱动程序

The Linux driver supports the LM73 Temperature Sensor. 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:

• lm73

Linux Source Files

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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