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MAX6690

更新时间： 2024-11-07 14:58:07
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
16页 149K
描述
2°C精度的远端/本地温度传感器，带有SMBus串行接口

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MAX6690 数据手册

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19-2190; Rev 2; 4/09  
2°C Accurate Remote/Local Temperature  
Sensor with SMBus Serial Interface  
MAX690  
General Description  
Features  
o High Accuracy 2°C (max) from +70°C to +100°C  
The MAX6690 is a precise digital thermometer that  
reports the temperature of both a remote P-N junction  
and its own die. The remote junction can be a diode-con-  
nected transistor—typically a low-cost, easily mounted  
2N3904 NPN type or 2N3906 PNP type—that replaces  
conventional thermistors or thermocouples. Remote  
accuracy is 2ꢀ° for multiple transistor manufacturers,  
with no calibration needed. The remote junction can also  
be a common-collector PNP, such as a substrate PNP of  
a microprocessor (µP).  
(Remote)  
o 11-Bit, 0.125°C Resolution  
o Dual Channel: Measures Remote and Local  
Temperature  
o No Calibration Required  
o Programmable Under/Overtemperature Alarms  
o I2C-Compatible/SMBus Interface  
o +3V to +5.5V Supply Range  
The 2-wire serial interface accepts standard System  
Management Bus (SMBusTM), Write Byte, Read Byte,  
Send Byte, and Receive Byte commands to program the  
alarm thresholds and to read temperature data.  
Measurements can be done automatically and  
autonomously, with the conversion rate programmed by  
the user, or programmed to operate in a single-shot  
mode. The adjustable conversion rate allows the user to  
optimize supply current and temperature update rate to  
match system needs. When the conversion rate is faster  
than 1Hz, the conversion results are available as a 7-bit-  
plus-sign byte with a 1ꢀ° LSB. When the conversion rate  
is 1Hz or slower, the MAX6690 enters the extended  
mode. In this mode, 3 additional bits of temperature data  
are available in the extended resolution register, provid-  
ing 10-bit-plus-sign resolution with a 0.125ꢀ° LSB.  
Single-shot conversions also have 0.125ꢀ° per LSB reso-  
lution when the conversion rate is 1Hz or slower.  
Ordering Information  
PART  
TEMP RANGE  
PIN-PACKAGE  
MAX6690MEE  
-55°° to +125°°  
16 QSOP  
Typical Operating Circuit  
0.1μF  
200Ω  
+3V TO +5V SUPPLY  
10kΩ EACH  
V
STBY  
CPU  
CC  
MAX6690  
DXP  
DXN  
SMBCLK  
SMBDATA  
ALERT  
CLOCK  
DATA  
2200pF  
INTERRUPT TO μC  
ADD0 ADD1  
GND  
A parasitic resistance cancellation (PR°) mode can also  
be invoked for conversion rates of 1Hz or slower by set-  
ting bit 4 of the configuration register to 1. In PR° mode,  
the effect of series resistance on the leads of the external  
diode is canceled. The 11-bit conversion in PR° mode is  
performed in < 500ms and is disabled for conversion  
rates faster than 1Hz. The one-shot conversion is also 11  
bits in < 500ms.  
Pin Configuration  
TOP VIEW  
N.C.  
1
2
3
16 N.C.  
The MAX6690 default low-temperature measurement  
limit is 0ꢀ°. This can be extended to -64ꢀ° by setting bit  
5 of the configuration register to 1.  
V
15 STBY  
CC  
DXP  
DXN  
N.C.  
14 SMBCLK  
13 N.C.  
4
5
6
7
8
MAX6690  
The MAX6690 is available in a small, 16-pin QSOP sur-  
face-mount package.  
12 SMBDATA  
11 ALERT  
10 ADD0  
ADD1  
GND  
GND  
________________________Applications  
Desktop °omputers  
Notebook °omputers  
Servers  
Workstations  
9
N.C.  
Test and Measurement  
Multichip Modules  
QSOP  
Thin °lients  
SMBus is a trademark of Intel °orp.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  
1234567...16

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