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MAX1989

更新时间： 2024-11-14 14:57:51
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
17页 497K
描述
多通道远端/本地温度传感器

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MAX1989 数据手册

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19-1766; Rev 2; 5/03  
Multichannel Remote/Local  
Temperature Sensors  
________________General Description  
____________________________Features  
The MAX1668/MAX1805/MAX1989 are precise multi-  
channel digital thermometers that report the tempera-  
ture of all remote sensors and their own packages. The  
remote sensors are diode-connected transistors—typi-  
cally low-cost, easily mounted 2N3904 NPN types—that  
replace conventional thermistors or thermocouples.  
Remote accuracy is 3ꢀ° for multiple transistor manu-  
facturers, with no calibration needed. The remote chan-  
nels can also measure the die temperature of other I°s,  
such as microprocessors, that contain an on-chip,  
diode-connected transistor.  
ꢀ Multichannel  
4 Remote, 1 Local (MAX1668/MAX1989)  
2 Remote, 1 Local (MAX1805)  
ꢀ No Calibration Required  
ꢀ SMBus 2-Wire Serial Interface  
ꢀ Programmable Under/Overtemperature Alarms  
ꢀ Supports SMBus Alert Response  
ꢀ Accuracy  
±2ꢀC (ꢁ60ꢀC to ꢁ100ꢀC, Local)  
±±ꢀC (-40ꢀC to ꢁ125ꢀC, Local)  
±±ꢀC (ꢁ60ꢀC to ꢁ100ꢀC, Remote)  
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 for-  
mat is 7 bits plus sign, with each bit corresponding to  
1ꢀ°, in two’s-complement format.  
ꢀ ±µA (typ) Standby Supply Current  
ꢀ 700µA (max) Supply Current  
The MAX1668/MAX1805/MAX1989 are available in  
small, 16-pin QSOP surface-mount packages. The  
MAX1989 is also available in a 16-pin TSSOP.  
ꢀ Small, 16-Pin QSOP/TSSOP Packages  
_______________Ordering Information  
________________________Applications  
PART  
TEMP RANGE  
-55ꢀ° to +125ꢀ°  
-55ꢀ° to +125ꢀ°  
-55ꢀ° to +125ꢀ°  
-55ꢀ° to +125ꢀ°  
PIN-PACKAGE  
16 QSOP  
MAX1668MEE  
MAX1805MEE  
MAX1989MEE  
MAX1989MUE  
Desktop and Notebook  
°omputers  
°entral-Office Telecom  
Equipment  
16 QSOP  
16 QSOP  
LAN Servers  
Test and Measurement  
Multichip Modules  
16 TSSOP  
Industrial °ontrols  
Pin Configuration  
Typical Operating Circuit  
3V TO 5.5V  
0.1µF  
200Ω  
TOP VIEW  
DXP1  
DXN1  
1
2
3
4
5
6
7
8
16 GND  
V
STBY  
CC  
10kΩ EACH  
15 STBY  
14 SMBCLK  
MAX1668  
MAX1805  
MAX1989  
DXP2  
DXP1  
CLOCK  
DATA  
SMBCLK  
DXN2  
MAX1668  
13 SMBDATA  
12 ALERT  
11 ADD0  
2200pF  
MAX1805  
MAX1989  
SMBDATA  
ALERT  
(N.C.) DXP3  
(N.C.) DXN3  
(N.C.) DXP4  
(N.C.) DXN4  
DXN1  
*
INTERRUPT  
TO µC  
10 ADD1  
DXP4  
DXN4  
2200pF  
9
V
CC  
*
ADD0 ADD1 GND  
QSOP/TSSOP  
( ) ARE FOR MAX1805.  
*
DIODE-CONNECTED TRANSISTOR  
SMBus is a trademark of Intel Corp.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...17

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