LM95221
- Accurately senses die temperature of remote ICs or diode junctions
- Remote diode fault detection
- On-board local temperature sensing
- Remote temperature readings:
- 0.125 °C LSb
- 10-bits plus sign or 11-bits programmable resolution
- 11-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
- Shutdown mode one-shot conversion control
- SMBus 2.0 compatible interface, supports TIMEOUT
- 8-pin MSOP package
Key Specifications
Local Temperature Accuracy | |
TA=0°C to 85°C | ±3.0 °C (max) |
Remote Diode Temperature Accuracy | |
TA=30°C to 50°C, TD=45°C to 85°C | ±1.0 °C (max) |
TA=0°C to 85°C, TD=25°C to 140°C | ±3.0 °C (max) |
Supply Voltage | 3.0 V to 3.6 V |
Supply Current | 2 mA (typ) |
The LM95221 is a dual remote diode temperature sensor in an 8-lead MSOP package. The 2-wire serial interface of the LM95221 is compatible with SMBus 2.0. The LM95221 can sense three temperature zones, it can measure the temperature of its own die as well as two diode connected transistors. The diode connected transistors can be a thermal diode as found in Pentium and AMD processors or can simply be a diode connected MMBT3904 transistor. The LM95221 resolution format for remote temperature readings can be programmed to be 10-bits plus sign or 11-bits unsigned. In the unsigned mode the LM95221 remote diode readings can resolve temperatures above 127°C. Local temperature readings have a resolution of 9-bits plus sign.
The temperature of any ASIC can be accurately determined using the LM95221 as long as a dedicated diode (semiconductor junction) is available on the target die. The LM95221 remote sensor accuracy of ±1°C is factory trimmed for a series resistance of 2.7 ohms and 1.008 non-ideality factor.
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 | LM95221 Dual Remote Diode Digital Temperature Sensor with SMBus Interface (jp) データシート (Rev. A 翻訳版) | 最新英語版 (Rev.B) | PDF | HTML | 2004年 5月 28日 | |
アプリケーション・ノート | Calibrating the ADC08xxxx Family of Ultra High-Speed Converters (jp) | 2008年 3月 6日 |
設計および開発
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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
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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