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.
기술 자료
유형 | 직함 | 날짜 | ||
---|---|---|---|---|
* | Data sheet | LM99 Accurate High Temp, Remote Diode Temp Sensor w/Two-Wire Interface datasheet (Rev. D) | 2013/03/22 | |
User guide | LM86, LM89, LM89-1, LM90, LM99, LM99-1 Evaluation Board User’s Guide | 2012/02/29 |
설계 및 개발
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LM90SW-LINUX — LM90용 Linux 드라이버
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 (...)
지원되는 제품 및 하드웨어
제품
디지털 온도 센서
정밀 ADC
패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
---|---|---|
VSSOP (DGK) | 8 | Ultra Librarian |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치