LM95231 具有 SMBus 接口和 TruTherm 技术的精密双路远程二极管温度传感器

The LM95231 is a precision dual remote diode temperature sensor (RDTS) that uses National's 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.

	LM95231
Temp Resolution (Max) (bits)	13
Supply Voltage (Min) (V)	3
Supply Voltage (Max) (V)	3.6
Iq (Typ) (uA)	363
Interface	2-Wire Serial
Sensor Type	Remote + Local
Remote Channel	2
Remote Sensor Correction	Beta Compensation
Remote Sensor Accuracy (Max) (+/- C)	0.75
Local Sensor Accuracy (Max) (+/- C)	0.75
Pin/Package	8VSSOP
Approx. Price (US$)	0.95 \| 1ku
Rating	Catalog

LM95231 特性

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

LM95231 器件用途

Processor/Computer System Thermal Management (e.g. Laptop, Desktop, Workstations, Server)
Electronic Test Equipment
Office Electronics

LM95231 工具和软件

培训内容	型号	软件/工具类型
用于硬件监控器和数字温度传感器的评估板软件	DIGITALTEMPSENSORSEVM-SW	应用软件
用于硬件监控器和数字温度传感器的评估板软件	SENSOREVAL	开发电路板/EVM

LM95231 应用手册

标题	类型	大小
Application Note 1852 Designing With pH Electrodes	PDF	225
Application Note 460 LM34/LM95231 Precision Monolithic Temperature Sensors	PDF	332
High-Efficiency 3A Battery Chargers Use LM2576 Regulators	PDF	143
Temperature Sensors Handbook	PDF	321
Sensing and Monitoring for Control and Protection Seminar	PDF	245