LM95231是TI公司的一款远程温度传感器产品，LM95231是采用 TruTherm 技术且具有 SMBus 接口的双路远程和本地温度传感器，本页介绍了LM95231的产品说明、应用、特性等，并给出了与LM95231相关的TI元器件型号供参考。
LM95231 - 采用 TruTherm 技术且具有 SMBus 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 LM95231 is a precision dual remote diode temperature sensor (RDTS) that uses Texas Instruments' TruTherm technology. The 2-wire serial interface of the LM95231 is compatible with SMBus 2.0. The LM95231 can sense three temperature zones, it can measure the temperature of its own die as well as two diode connected transistors. The LM95231 includes digital filtering and an advanced input stage that includes analog filtering and TruTherm technology that reduces processor-to-processor non-ideality spread. The diode connected transistors can be a “thermal diode” as found in Intel and AMD processors or can simply be a diode connected MMBT3904 transistor. TruTherm technology allows accurate measurement of “thermal diodes” found on small geometry processes, 90nm and below. The LM95231 supports user selectable thermal diode non-ideality of either a Pentium 4 processor on 90nm process or 2N3904.
The LM95231 resolution format for remote temperature readings can be programmed to be 11-bits signed or unsigned with the digital filtering disabled. When the filtering is enabled the resolution increases to 13-bits signed or unsigned. In the unsigned mode the LM95231 remote diode readings can resolve temperatures above 127°C. Local temperature readings have a resolution of 9-bits plus sign.
- Accurately Senses Die Temperature of Remote ICs or Diode Junctions
- Uses TruTherm Technology for Precision “Thermal Diode” Temperature Measurement
- Thermal Diode Input Stage with Analog Filtering
- Thermal Diode Digital Filtering
- Intel Pentium 4 Processor on 90nm Process or 2N3904 Non-ideality Selection
- Remote Diode Fault Detection
- On-board Local Temperature Sensing
- Remote Temperature Readings Without Digital Filtering:
- 0.125°C LSb
- 10-bits Plus Sign or 11-bits Programmable Resolution
- 11-bits Resolves Temperatures Above 127 °C
- Remote Temperature Readings with Digital Filtering:
- 0.03125°C LSb with Filtering
- 12-bits Plus Sign or 13-bits Programmable Resolution
- 13-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
- Remote Temperature Accuracy ±0.75°C (max)
- Local Temperature Accuracy ±3.0°C (max)
- Supply Voltage 3.0V to 3.6V
- Supply Current 402μA (typ)
