LM90
- Accurately Senses Die Temperature of Remote ICs or Diode Junctions
- Offset Register Allows Sensing a Variety of Thermal Diodes Accurately
- On-board Local Temperature Sensing
- 10 Bit Plus Sign Remote Diode Temperature Data Format, 0.125°C Resolution
- Diode Fault Detection Circuitry
- T_CRIT_A Output Useful for System Shutdown (Open Diode does not Activate T_CRIT_A)
- ALERT Output Supports SMBus 2.0 Protocol
- SMBus 2.0 Compatible Interface, Supports TIMEOUT
- 8-pin VSSOP Package
Key Specifications
- Supply Voltage 3.0 to 3.6 V
- Supply Current 0.8 mA (Typ)
- Local Temp
Accuracy (Includes Quantization Error)
- TA=25°C to 125°C, ±4.0 °C (Max)
- Remote Diode Temp Accuracy (Includes
Quantization Error)
- TA=30°C to 50°C, TD=60°C to 100°C, ±3.0 °C (Max)
- TA=0°C to 85°C, TD=25°C to 125°C, ±4.0 °C (Max)
The LM90 is an 11-bit digital temperature sensor with a 2-wire System Management Bus (SMBus) serial interface. The LM90 accurately measures its own temperature as well as the temperature of an external device, such as processor thermal diode or diode connected transistor such as the 2N3904. The temperature of any ASIC can be accurately determined using the LM90 as long as a dedicated diode (semiconductor junction) is available on the target die. The LM90 remote sensor accuracy of ±3°C is factory trimmed for the 1.008 typical non-ideality factor of the mobile Pentium III thermal diode. The LM90 has an Offset register to allow measuring other diodes without requiring continuous software management.
Activation of the ALERT output occurs when any temperature goes outside a preprogrammed window set by the HIGH and LOW temperature limit registers or exceeds the T_CRIT temperature limit. Activation of the T_CRIT_A occurs when any temperature exceeds the T_CRIT programmed limit. The LM90 is pin and register compatible with the LM86, Analog Devices ADM1032 and Maxim MAX6657/8.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | LM90 +-;3C Accurate, Remote Diode & Local Dig Temp Sensor w/2-Wire Interface 数据表 (Rev. A) | 2013-3-25 | |||
| 用户指南 | LM86, LM89, LM89-1, LM90, LM99, LM99-1 Evaluation Board User’s Guide | 2012-2-29 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
LM90SW-LINUX — 用于 LM90 的 Linux 驱动程序
The Linux driver supports the LM90 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:
- (...)
DIGITALTEMPSENSORSEVM-SW — Eval Board Software for Hardware Monitors and Digital Temp Sensors
SENSOREVAL — Eval Board Software For Hardware Monitors And Digital Temperature Sensors
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
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |