LM95221是TI公司的一款远程温度传感器产品，LM95221是采用 TruTherm 技术且具有 SMBus 和 I2C 接口的双路远程和本地温度传感器，本页介绍了LM95221的产品说明、应用、特性等，并给出了与LM95221相关的TI元器件型号供参考。
LM95221 - 采用 TruTherm 技术且具有 SMBus 和 I2C 接口的双路远程和本地温度传感器 - 远程温度传感器 - 温度传感器和控制IC - TI公司（Texas Instruments，德州仪器）
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)
