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

LM95221是TI德州仪器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，本站介绍了LM95221的封装应用图解、特点和优点、功能等，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 - 德州仪器

产品描述

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.

产品特性

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)

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