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參數資料
| 型號： | LM85 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號調理 |
| 英文描述： | Hardware Monitor with Integrated Fan Control |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO24 |
| 封裝： | QSOP-24 |
| 文件頁數： | 1/26頁 |
| 文件大小： | 261K |
| 代理商： | LM85 |
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
, 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
n
Resolution
n
Temperature Sensor Accuracy
n
Temperature Range
— LM85 Operational
— Remote Temp Accuracy
n
Power Supply Voltage
n
Power Supply Current
±
2% FS (max)
8-bits, 1C
±
3C (max)
0C to +85C
0C to +125C
+3.0V to +3.6V
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
L
2003 National Semiconductor Corporation
DS200353
www.national.com
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| LM8500HLQ9 | 功能描述:IC TOUCHSCREEN CONTROLLER 44LLP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 觸摸屏控制器 系列:- 標準包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數/鍵:- 分辨率（位）:- 評估套件:* 數據接口:- 數據速率/采樣率 (SPS，BPS):- 電壓基準:- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR) |
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| LM8500HVA9 | 功能描述:IC TOUCHSCREEN CONTROLLER 44PLCC RoHS:否 類別:集成電路 (IC) >> 數據采集 - 觸摸屏控制器 系列:- 標準包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數/鍵:- 分辨率（位）:- 評估套件:* 數據接口:- 數據速率/采樣率 (SPS，BPS):- 電壓基準:- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR) |
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