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MAX1618

更新时间： 2024-09-23 22:57:59
品牌 Logo 应用领域
美信 - MAXIM 传感器温度传感器
页数 文件大小 规格书
20页 429K
描述
Remote Temperature Sensor with SMBus Serial Interface

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MAX1618 数据手册

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19-1495; Rev 1; 10/99  
Remote Temperature Sensor  
with SMBus Serial Interface  
________________General Description  
____________________________Features  
The MAX1618 precise digital thermometer reports the  
temperature of a remote sensor. The remote sensor is a  
diode-connected transistor—typically a low-cost, easily  
mounted 2N3904 NPN type—that replaces conventional  
thermistors or thermocouples. Remote accuracy is 3ꢀ°  
for multiple transistor manufacturers, with no calibration  
needed. The MAX1618 can also measure the die temper-  
ature of other I°s, such as microprocessors, that contain  
an on-chip, diode-connected transistor.  
ꢀ Single Channel: Measures Remote CPU  
Temperature  
ꢀ No Calibration Required  
ꢀ SMBus 2-Wire Serial Interface  
ꢀ Programmable Under/Overtemperature Alarms  
ꢀ Overtemperature Output for Fan Control  
(Thermostat Mode)  
The 2-wire serial interface accepts standard System  
Management Bus (SMBus™) Write Byte, Read Byte, Send  
Byte, and Receive Byte commands to program the alarm  
thresholds and to read temperature data. The data format  
is 7 bits plus sign, with each bit corresponding to 1ꢀ°, in  
two’s complement format. Measurements can be done  
automatically and autonomously, with the 16Hz conversion  
rate or programmed to operate in a single-shot mode.  
ꢀ Supports SMBus Alert Response Accuracy  
3°C (+60°C to +100°C)  
5°C (-55°C to +120°C)  
ꢀ 3µA (typ) Standby Supply Current  
ꢀ 900µA (max) Supply Current in Autoconvert Mode  
ꢀ +3V to +5.5V Supply Range  
The thermostat mode configures the ALERT output as an  
interrupt or as a temperature reset that remains active only  
while the temperature is above the maximum temperature  
limit or below the minimum temperature limit. The ALERT  
output polarity in thermostat mode can be configured for  
active high or active low. Fan control is implemented using  
this ALERT output.  
ꢀ Small 10-Pin µMAX Package  
Ordering Information  
PART  
TEMP. RANGE  
PIN-PACKAGE  
The MAX1618 is available in a small (1.1mm high) 10-pin  
µMAX package.  
MAX1618MUB  
-55ꢀ° to +125ꢀ°  
10 µMAX  
________________________Applications  
Desktop and Notebook  
°omputers  
°entral Office  
Telecom Equipment  
Smart Battery Packs  
LAN Servers  
Test and Measurement  
Multichip Modules  
Industrial °ontrols  
Typical Operating Circuit  
___________________Pin Configuration  
3V TO 5.5V  
200Ω  
0.1µF  
TOP VIEW  
V
STBY  
CC  
10k EACH  
MAX1618  
ADD0  
ADD1  
GND  
DXN  
1
2
3
4
5
10 ALERT  
DXP  
DXN  
CLOCK  
DATA  
SMBCLK  
9
8
7
6
SMBDATA  
MAX1618  
SMBDATA  
ALERT  
SMBCLK  
STBY  
INTERRUPT  
TO µC  
2N3904  
2200pF  
DXP  
V
CC  
ADD0 ADD1 GND  
µMAX  
SMBus is a trademark of Intel Corp.  
†Patents Pending  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.  
For small orders, phone 1-800-835-8769.  
1234567...20

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