LM90 具有双线接口的 ±3°C 准确、远程二极管和本地数字温度传感器

The LM90 is an 11-bit digital temperature sensor with a 2-wire System Management Bus (SMBus) serial interface. The LM90 accurately measures its own temperature as well as the temperature of an external device, such as processor thermal diode or diode connected transistor such as the 2N3904. The temperature of any ASIC can be accurately determined using the LM90 as long as a dedicated diode (semiconductor junction) is available on the target die. The LM90 remote sensor accuracy of ±3°C is factory trimmed for the 1.008 typical non-ideality factor of the mobile Pentium™ III thermal diode. The LM90 has an Offset register to allow measuring other diodes without requiring continuous software management. Contact hardware.

	LM90
Temp Resolution (Max) (bits)	11
Supply Voltage (Min) (V)	3
Supply Voltage (Max) (V)	3.6
Iq (Typ) (uA)	1700
Interface	2-Wire Serial
Sensor Type	Remote + Local
Remote Channel	1
Remote Sensor Accuracy (Max) (+/- C)	3
Local Sensor Accuracy (Max) (+/- C)	4
Fault Queue	Yes
Pin/Package	8VSSOP
Approx. Price (US$)	0.72 \| 1ku
Rating	Catalog

LM90 特性

Accurately senses die temperature of remote ICs or diode junctions
Offset register allows sensing a variety of thermal diodes accurately
On-board local temperature sensing
10 bit plus sign remote diode temperature data format, 0.125 °C resolution
Diode fault detection circuitry
T_CRIT_A# output useful for system shutdown (open diode does not activate T_CRIT_A#)
ALERT# output supports SMBus 2.0 protocol
SMBus 2.0 compatible interface, supports TIMEOUT
8-pin MSOP packages

LM90 器件用途

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

LM90 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