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| 型号： | LM85BIMQ/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO24 |
| 封装： | QSOP-24 |
| 文件页数： | 1/26页 |
| 文件大小： | 261K |
| 代理商： | LM85BIMQ/NOPB |
LM85
Hardware Monitor with Integrated Fan Control
General Description
The LM85, hardware monitor, has a two wire digital interface
compatible with SMBus 2.0. Using an 8-bit
Σ ADC, the
LM85 measures:
– the temperature of two remote diode connected transis-
tors as well as its own die
– the V
CCP, 2.5V, 3.3VSBY, 5.0V, and 12V supplies (inter-
nal scaling resistors).
To set fan speed, the LM85 has three PWM outputs that are
each controlled by one of three temperature zones. The
LM85 includes a digital filter that can be invoked to smooth
temperature readings for better control of fan speed. The
LM85 has four tachometer inputs to measure fan speed.
Limit and status registers for all measured values are in-
cluded.
Features
n
2-wire, SMBus 2.0 compliant, serial digital interface
n
8-bit
Σ ADC
n
Monitors V
CCP, 2.5V, 3.3 VSBY, 5.0V, and 12V
motherboard/processor supplies
n
Monitors 2 remote thermal diodes
n
Programmable autonomous fan control based on
temperature readings
n
Noise filtering of temperature reading for fan control
n
1.0C digital temperature sensor resolution
n
3 PWM fan speed control outputs
n
4 fan tachometer inputs
n
Monitors 5 VID control lines
n
24-pin QSOP package
n
XOR-tree test mode
Key Specifications
n
Voltage Measurement Accuracy
±2% FS (max)
n
Resolution
8-bits, 1C
n
Temperature Sensor Accuracy
±3C (max)
n
Temperature Range
— LM85 Operational
0C to +85C
— Remote Temp Accuracy
0C to +125C
n
Power Supply Voltage
+3.0V to +3.6V
n
Power Supply Current
0.53 mA
Applications
n
Desktop PC
n
Microprocessor based equipment
(e.g. Base-stations, Routers, ATMs, Point of Sales)
Block Diagram
20035301
March 2003
LM85
Hardware
Monitor
with
Integrated
Fan
Control
2003 National Semiconductor Corporation
DS200353
www.national.com
相关PDF资料 |
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| LM9140BYZ-5.0X | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 5 V, PBCY3 |
| LM9140BYZ-4.1X | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 4.096 V, PBCY3 |
| LM9140BYZ-5.0 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 5 V, PBCY3 |
| LM9140BYZ-4.1 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 4.096 V, PBCY3 |
| LM9801CCVX | SPECIALTY ANALOG CIRCUIT, PQCC52 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM85BIMQX | 制造商:Rochester Electronics LLC 功能描述:SYSTEM HDW MONITOR W/FAN CNTRL - Bulk |
| LM85BIMQX/NOPB | 制造商:Texas Instruments 功能描述:Temp Sensor Digital Serial (2-Wire) 24-Pin QSOP T/R |
| LM86 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:【0.75∑C Accurate, Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface |
| LM86CIM | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| LM86CIM/NOPB | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
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