LM81_TI 本地温度传感器、风扇控制、硬件和 6 个电源电压监控器

LM81的基本参数

制造厂商：TI
产品类别：传感器
技术类目：温度传感器和控制 IC - 数字温度传感器
功能描述：本地温度传感器、风扇控制、硬件和 6 个电源电压监控器
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LM81的产品详情：

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

LM81的优势和特性：

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

All trademarks are the property of their respective owners.

LM81的参数（英文）：

Local sensor accuracy (Max) (+/- C)
3
Type
Fan Controller
Operating temperature range (C)
-40 to 125
Supply voltage (Min) (V)
2.8
Interface type
I2C, SMBus
Supply voltage (Max) (V)
3.8
Supply current (Max) (uA)
900
Temp resolution (Max) (bits)
12
Features
Tachometer, ALERT
Remote channels (#)
0
Addresses
4
Rating
Catalog

LM81具体的完整产品型号参数及价格（美元）：

LM81的完整型号有：LM81BIMT-3/NOPB、LM81BIMTX-3/NOPB、LM81CIMT-3/NOPB、LM81CIMTX-3/NOPB，以下是这些产品的关键参数及官网采购报价：

LM81BIMT-3/NOPB，工作温度：-40 to 125，封装：TSSOP (PW)-24，包装数量MPQ：61个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM81BIMT-3/NOPB的批量USD价格：2.463（1000+）

LM81BIMTX-3/NOPB，工作温度：-40 to 125，封装：TSSOP (PW)-24，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM81BIMTX-3/NOPB的批量USD价格：2.069（1000+）

LM81CIMT-3/NOPB，工作温度：-40 to 125，封装：TSSOP (PW)-24，包装数量MPQ：61个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM81CIMT-3/NOPB的批量USD价格：2.463（1000+）

LM81CIMTX-3/NOPB，工作温度：-40 to 125，封装：TSSOP (PW)-24，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM81CIMTX-3/NOPB的批量USD价格：2.069（1000+）

LM81的评估套件：

LM81的电路图解：

LM81的评估套件：