LM89 具有双线接口线接口的 ±0.75°C、远程和本地数字温度传感器
The LM89 is an 11-bit digital temperature sensor with a 2-wire System Management Bus (SMBus) serial interface. The LM89 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 LM89 as long as a dedicated diode (semiconductor junction) is available on the target die. The LM89 remote sensor accuracy of ±0.75°C is factory trimmed for the series resistance and 1.0021 typical non-ideality factor of the Intel® Pentium™ 4 and the Mobile Pentium™ 4 Processor-M thermal diode. The LM89 has an Offset register to allow measuring other diodes without requiring continuous software management.
|
LM89 |
| 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) |
0.75 |
| Local Sensor Accuracy (Max) (+/- C) |
3 |
| Fault Queue |
Yes |
| Pin/Package |
8SOIC, 8VSSOP |
| Approx. Price (US$) |
0.90 | 1ku |
| Rating |
Catalog |
LM89 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
- T_CRIT_A# output useful for system shutdown
- ALERT# output supports SMBus 2.0 protocol
- SMBus 2.0 compatible interface, supports TIMEOUT
- 8-pin MSOP and SOIC packages
LM89 器件用途
- Processor/Computer System Thermal Management (e.g. Laptop, Desktop, Workstations, Server)
- Electronic Test Equipment
- Office Electronics
LM89 工具和软件
LM89 应用技术支持与电子电路设计开发资源下载
- LM89 数据资料 dataSheet 下载.PDF
- TI 德州仪器温度传感器产品选型与价格 . xls
- (应用手册)Sensing and Monitoring for Control and Protection Seminar
- (应用手册)Tiny Temperature Sensors for Remote Systems
- (应用手册)Temperature Sensors Handbook
- (白皮书)Cost Effective Partitioning of IO & Mgm Func in PCs - Intro of SensorPath Tech
- (应用手册)Applying I2C Compatible Temperature Sensors in Systems with Slow Clock
- (应用手册)Application Note 1155 A Simple Software I2C Routine for the COP8
