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.
技術資料
種類 | タイトル | 最新の英語版をダウンロード | 日付 | |||
---|---|---|---|---|---|---|
* | データシート | LM99 Accurate High Temp, Remote Diode Temp Sensor w/Two-Wire Interface データシート (Rev. D) | 2013年 3月 22日 | |||
ユーザー・ガイド | LM86, LM89, LM89-1, LM90, LM99, LM99-1 Evaluation Board User’s Guide | 2012年 2月 29日 |
設計および開発
その他のアイテムや必要なリソースを参照するには、以下のタイトルをクリックして詳細ページをご覧ください。
LM90SW-LINUX — Linux ドライバ、LM90 用
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 (...)
サポート対象の製品とハードウェア
製品
デジタル温度センサ
高精度 ADC
パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
---|---|---|
VSSOP (DGK) | 8 | Ultra Librarian |
購入と品質
- RoHS
- REACH
- デバイスのマーキング
- リード端子の仕上げ / ボールの原材料
- MSL 定格 / ピーク リフロー
- MTBF/FIT 推定値
- 使用原材料
- 認定試験結果
- 継続的な信頼性モニタ試験結果
- ファブの拠点
- 組み立てを実施した拠点