LM95221
- 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)
- TA = 30°C to 50°C, TD = 45°C to 85°C
- Supply Voltage 3.0 V to 3.6 V
- Supply Current 2 mA (Typ)
All trademarks are the property of their respective owners.
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.
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 | LM95221 Dual Remote Diode Digital Temperature Sensor with SMBus Interface 数据表 (Rev. B) | 2013-3-22 | |||
| 应用手册 | Calibrating the ADC08xxxx Family of Ultra High-Speed Converters (cn) | 2008-3-6 |
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）。
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 |