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LM75

更新时间： 2024-09-15 11:36:47
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
12页 266K
描述
Digital Temperature Sensor and Thermal Watchdog with 2-Wire Interface

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LM75 数据手册

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19-4385; Rev 0; 3/09  
Digital Temperature Sensor and Thermal  
Watchdog with 2-Wire Interface  
LM75  
General Description  
Features  
o SO (SOP) and µMAX® (µSOP) Packages  
o I2C Bus Interface  
The LM75 temperature sensor includes a delta-sigma  
analog-to-digital converter, and a digital overtempera-  
ture detector. The host can query the LM75 through its  
o Separate Open-Drain OS Output Operates as  
2
I C interface to read temperature at any time. The  
Interrupt or Comparator/Thermostat Input  
open-drain overtemperature output (OS) sinks current  
when the programmable temperature limit is exceeded.  
The OS output operates in either of two modes, com-  
parator or interrupt. The host controls the temperature  
o Register Readback Capability  
o Power-Up Defaults Permit Stand-Alone Operation  
as a Thermostat  
o 3.0V to 5.5V Supply Voltage  
at which the alarm is asserted (T ) and the hysteresis  
OS  
temperature below which the alarm condition is not  
o Low Operating Supply Current 250µA (typ), 1mA  
valid (T  
). Also, the LM75’s T  
and T  
regis-  
HYST  
HYST  
OS  
(max)  
ters can be read by the host. The address of the LM75  
is set with three pins to allow multiple devices to work  
on the same bus. Power-up is in comparator mode, with  
o 4µA (typ) Shutdown Mode Minimizes Power  
Consumption  
o Up to Eight LM75s Can Be Connected to a Single  
defaults of T  
= +80°C and T  
= +75°C. The 3.0V  
OS  
HYST  
Bus  
to 5.5V supply voltage range, low supply current, and  
2
I C interface make the LM75 ideal for many applica-  
o Pin- and/or Register-Compatible with Improved-  
Performance Maxim Sensors Including MAX7500,  
MAX6625, MAX6626, DS75LV, and DS7505  
tions in thermal management and protection.  
Applications  
Thermal System Management  
Thermal Protection  
Functional Diagram  
+V = 3.0V to 5.5V  
S
Test Equipment  
Computers and Office Electronics  
8
3
OS  
16  
16  
SILICON  
BANDGAP  
TEMPERATURE  
SENSOR  
SET POINT  
COMPARATOR W/  
HYSTERESIS  
9-BIT DELTA-  
SIGMA ADC  
µMAX is a registered trademark of Maxim Integrated Products, Inc.  
TOS SET POINT  
REGISTER  
Pin Configuration  
TOP VIEW  
POINTER  
REGISTER  
CONFIGURATION  
REGISTER  
T
SET  
HYST  
POINT REGISTER  
+
SDA  
SCL  
OS  
1
2
3
4
8
7
6
5
+V  
A0  
A1  
A2  
S
8
16  
8
16  
16  
LM75  
7
6
5
1
2
A0  
A1  
A2  
SDA  
SCL  
2-WIRE INTERFACE  
4
GND  
μMAX (μSOP), SO  
Ordering Information/Selector Guide  
PART  
LM75BIM-3+  
PIN-PACKAGE  
8 SO (SOP)  
PKG  
Bulk  
T&R  
Bulk  
T&R  
Bulk  
T&R  
Bulk  
T&R  
SUPPLY VOLTAGE (V)  
TOP MARK  
LM75BIM-3  
LM75BIM-3  
T01B  
3.3  
3.3  
3.3  
3.3  
5.0  
5.0  
5.0  
LM75BIMX-3+  
LM75BIMM-3+  
LM75BIMMX-3+  
LM75BIM-5+  
8 SO (SOP)  
8 µMAX (µSOP)  
8 µMAX (µSOP)  
8 SO (SOP)  
T01B  
LM75BIM-5  
LM75BIM-5  
T00B  
LM75BIMX-5+  
LM75BIMM-5+  
LM75BIMMX-5+  
8 SO (SOP)  
8 µMAX (µSOP)  
8 µMAX (µSOP)  
5.0  
2
T00B  
Note: Devices are specified over the -55°C to +125°C temperature range and include I C noise filter.  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
T&R = Tape and reel.  
________________________________________________________________ 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...12

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