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MAX6656

更新时间： 2024-11-27 14:58:11
品牌 Logo 应用领域
亚德诺 - ADI 温度传感传感器温度传感器
页数 文件大小 规格书
19页 1438K
描述
双路远端/本地温度传感器及四路电压监测器

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MAX6656 数据手册

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Click here to ask an associate for production status of specific part numbers.  
Dual Remote/Local Temperature Sensors  
and Four-Channel Voltage Monitors  
MAX6655/MAX6656  
General Description  
Features  
● Three Temperature Channels  
• Two Remote PN Junctions  
• One Local Sensor  
The MAX6655/MAX6656 are precise voltage and  
temperature monitors. The digital thermometer reports  
the temperature of two remote sensors and its own die  
temperature. The remote sensors are diode-connected  
transistors—typically a low-cost, easily mounted 2N3906  
PNP type—that replace conventional thermistors or  
thermocouples. Remote accuracy is ±1°C for multiple  
transistor manufacturers with no calibration necessary.  
The remote channels can also measure the die  
temperature of other ICs, such as microprocessors,  
that contain a substrate-connected PNP with its collector  
grounded and its base and emitter available for temperature-  
sensing purposes. The temperature is digitized with 11-bit  
resolution.  
● Four Voltage Channels  
• +12V, +5V, +3.3V, +2.5V  
• Three External Monitors  
• One Internal Supply Monitor  
● 11-Bit, 0.125°C Resolution  
● High Accuracy: ±1°C Over +60°C to +100°C  
Temperature Range  
● Programmable Under/Over-Threshold Alarms  
● Programmable Power-Saving Mode  
● No Calibration Required  
The MAX6655/MAX6656 also measure their own supply  
voltage and three external voltages with 8-bit resolution.  
Each voltage input’s sensitivity is set to give approximately  
3/4-scale output code when the input voltage is at its nominal  
value. The MAX6655 operates at +5V supply and its second  
voltage monitor is 3.3V. The MAX6656 operates on a  
+3.3V supply and its second voltage monitor is 5V.  
2
● SMBus/I C-Compatible Interface  
● OVERT Output for Fan Control and System  
Shutdown  
Ordering Information  
PIN-  
PACKAGE  
PKG  
CODE  
PART  
TEMP RANGE  
The 2-wire serial interface accepts standard SMBus™  
Write Byte, Read Byte, Send Byte, and Receive Byte  
commands to program the alarm thresholds and to read  
data. The MAX6655/MAX6656 also provide SMBus alert  
response and timeout functions. The MAX6655/MAX6656  
measure automatically and autonomously, with the con-  
version rate programmable. The adjustable rate allows  
the user to control the supply current.  
MAX6655MEE -55°C to +125°C 16 QSOP  
MAX6656MEE -55°C to +125°C 16 QSOP  
E16-5  
E16-5  
Typical Application Circuit appears at end of data sheet.  
Pin Configuration  
In addition to the SMBus ALERT output, the MAX6655/  
MAX6656 feature an OVERT output, which is used as  
a temperature reset that remains active only while the  
temperature is above the maximum temperature limit.  
The OVERT output is optimal for fan control or for  
system shutdown.  
TOP VIEW  
V
1
2
3
4
5
6
7
8
16 STBY  
CC  
DXP1  
DXN1  
ADD0  
ADD1  
DXP2  
DXN2  
GND  
15 SMBCLK  
14 OVERT  
13 SMBDATA  
12 ALERT  
MAX6655  
MAX6656  
Applications  
● Notebooks  
● Thin Clients  
● Servers  
● Workstations  
11  
10  
9
V
IN2  
V
IN1  
V
IN3  
● Communication  
Equipment  
● Desktop PC  
QSOP  
SMBus is a trademark of Intel Corp.  
19-2117; Rev 3; 3/21  
©
2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.  
One Analog Way, Wilmington, MA 01887 U.S.A. Tel: 781.329.4700 © 2021 Analog Devices, Inc. All rights reserved.  
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