LM81
- Temperature Sensing
- 6 Positive Voltage Inputs with Scaling Resistors to Monitor
+5V, +12V, +3.3V, +2.5V, Vccp Power Supplies Directly - 8-Bit DAC Output for Controlling Fan Speed
- 2 Fan Speed Monitoring Inputs
- Chassis Intrusion Detector Input
- WATCHDOG Comparison of all Monitored Values
- SMBus 1.0 (LM81C) and 1.1 (LM81B) Serial Bus
Interface Compatibility - LM81B has Improved Voltage Monitoring Accuracy
- VID0-VID4 Monitoring Inputs
Key Specifications
- Voltage Monitoring Error: +2% or ±1.2% (max)
- Temperature Error
- −40˚C to +125˚C ± 3˚C (max)
- Supply Voltage Range: 2.8V to 3.8V
- Supply Current: 0.4 mA (typ)
- ADC and DAC Resolution: 8 Bits
- Temperature Resolution: 0.5°C
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The LM81 is a highly integrated data acquisition system for hardware monitoring of servers, Personal Computers, or virtually any microprocessor-based system. In a PC, the LM81 can be used to monitor power supply voltages, temperatures, and fan speeds. Actual values for these inputs can be read at any time. Programmable WATCHDOG limits in the LM81 activate a fully programmable and maskable interrupt system with two outputs (INT and T_CRIT_). The LM81 has an on-chip digital output temperature sensor with 9-bit or 12-bit resolution, a 6 analog input ADC with 8-bit resolution and an 8-bit DAC. Two fan tachometer outputs can be measured with the LM81’s FAN1 and FAN2 inputs. The DAC, with a 0 to 1.25V output voltage range, can be used for fan speed control. Additional inputs are provided for Chassis Intrusion detection circuits, and VID monitor inputs. The LM81 has a Serial Bus interface that is compatible with SMBus. Serial Bus Timing Diagram
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | Serial Interface ACP-Compatible Microprocessor Sys Hardware Monitor 数据表 (Rev. E) | 2013年 9月 5日 | |||
应用手册 | Applying I2C-Compatible Temperature Sensors in Systems With Slow Clock Edges (Rev. A) | 2013年 5月 6日 | ||||
白皮书 | Cost Effective Partitioning of IO & Mgm Func in PCs - Intro of SensorPath Tech | 2004年 1月 1日 |
设计和开发
如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。
封装 | 引脚 | 下载 |
---|---|---|
TSSOP (PW) | 24 | 查看选项 |
订购和质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点