LM99
Sensor de temperatura local y remoto con tecnología TruTherm e interfaz SMBus
LM99
- Accurately Senses the Temperature of Remote Diodes
- Offset Register Allows Use of a Variety of Thermal Diodes
- On-board Local Temperature Sensing
- 10 Bit Plus Sign Remote Diode Temperature Data Format, 0.125 °C Resolution
- T_CRIT_A Output Useful for System Shutdown
- ALERT Output Supports SMBus 2.0 Protocol
- SMBus 2.0 Compatible Interface, Supports TIMEOUT
- 8-Pin VSSOP Package
Key Specifications
- Supply Voltage 3.0 V to 3.6 V
- Supply Current 0.8 mA (typ)
- Local Temp Accuracy
(Includes Quantization error)- TA = 25°C to 125°C ±3.0°C (Max)
- Remote Diode Temp Accuracy
(Includes Quantization Error)- TA = 30°C to 50°C, TD = 120°C to 140°C ±1.0°C (Max)
- TA = 0°C to 85°C, TD = 25°C to 140°C ±3.0°C (Max)
All trademarks are the property of their respective owners.
The LM99 is an 11-bit remote diode temperature sensor with a 2-wire System Management Bus (SMBus) serial interface. The LM99 accurately measures: (1) its own temperature and (2) the temperature of a remote diode-connected transistor such as the 2N3904 or a thermal diode commonly found on Graphics Processor Units (GPU), Computer Processor Units (CPU or other ASICs. The LM99 remote diode temperature sensor shifts the temperature from the remote sensor down 16°C and operates on that shifted temperature:
TACTUAL DIODE JUNCTION = TLM99 + 16°C
The local temperature reading requires no offset.
The LM99 has an Offset Register which provides a means for precise matching to various thermal diodes.
The LM99 and LM99-1 have the same functions but different SMBus slave addresses. This allows for one of each to be on the same bus at the same time.
Activation of the ALERT output occurs when any temperature goes outside a preprogrammed window set by the HIGH and LOW temperature limit registers or exceeds the T_CRIT temperature limit. Activation of the T_CRIT_A occurs when any temperature exceeds the T_CRIT programmed limit.
Documentación técnica
Tipo | Título | Fecha | ||
---|---|---|---|---|
* | Data sheet | LM99 Accurate High Temp, Remote Diode Temp Sensor w/Two-Wire Interface datasheet (Rev. D) | 22 mar 2013 | |
User guide | LM86, LM89, LM89-1, LM90, LM99, LM99-1 Evaluation Board User’s Guide | 29 feb 2012 |
Diseño y desarrollo
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
LM90SW-LINUX — Controlador Linux para LM90
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
Supported Devices:
- (...)
SENSOREVAL — Eval Board Software For Hardware Monitors And Digital Temperature Sensors
SensorEval
SensorEval software supports the latest TI temperature sensor and hardware monitor evaluation boards via USB interface. It also allows access to sensors mounted directly on motherboards that support Intel chip sets.
- Download SensorEval Software and Manual
- Windows XP support is offered for (...)
Productos y hardware compatibles
Productos
Sensores de temperatura digitales
ADC de precisión
Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
---|---|---|
VSSOP (DGK) | 8 | Ultra Librarian |
Pedidos y calidad
- RoHS
- REACH
- Marcado del dispositivo
- Acabado de plomo/material de la bola
- Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
- Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
- Contenido del material
- Resumen de calificaciones
- Monitoreo continuo de confiabilidad
- Lugar de fabricación
- Lugar de ensamblaje
Soporte y capacitación
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