LM75AIM/NOPB National Semiconductor, LM75AIM/NOPB Datasheet

IC TEMP SENSOR WATCHDOG 8-SOIC

LM75AIM/NOPB

Manufacturer Part Number
LM75AIM/NOPB
Description
IC TEMP SENSOR WATCHDOG 8-SOIC
Manufacturer
National Semiconductor
Datasheet

Specifications of LM75AIM/NOPB

Function
Temp Sensor, Watchdog
Topology
ADC (Sigma Delta), Comparator, Register Bank
Sensor Type
Internal
Sensing Temperature
-55°C ~ 125°C
Output Type
I²C™
Output Alarm
Yes
Output Fan
Yes
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-55°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
For Use With
OM6285 - EVAL BOARD I2C-2002-1A568-4002 - DEMO BOARD I2C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM75AIM
© 2009 National Semiconductor Corporation
LM75
Digital Temperature Sensor and Thermal Watchdog with
Two-Wire Interface
General Description
The LM75A, LM75B and LM75C are a family of industy-stan-
dard digital temperature sensors with an integrated Sigma-
Delta analog-to-digital converter and I
LM75 provides 9-bit digital temperature readings with an ac-
curacy of ±2°C from -25°C to 100°C and ±3°C over -55°C to
125°C.
The LM75A operates with a single supply from +2.7V to
+5.5V. Communication is accomplished over a 2-wire inter-
face which operates up to 400kHz. The LM75 has three
address pins, allowing up to eight LM75 devices to operate
on the same 2-wire bus. The LM75 has a dedicated over-
temperature output (O.S.) with programmable limit and hys-
tersis. This output has programmable fault tolerance, which
allows the user to define the number of consecutive error
conditions that must occur before O.S. is activated.
The wide temperature and supply range and I
make the LM75 ideal for a number of applications including
base stations, electronic test equipment, office electronics,
personal computers, and any other system where thermal
management is critical to performance. The LM75A, LM75B
and LM75C are available in an SOP-8 pacakage. The LM75B
and LM75C are available in an MSOP-8 package.
Simplified Block Diagram
I
2
C® is a registered trademark of Philips Corporation.
2
12658
C
®
interface. The
2
C interface
■ 
■ 
■ 
Applications
Features
Key Specifications
Supply Voltage
Supply Current
Temperature Accuracy
General System Thermal Management
Communications Infrastructure
Electronic Test Equipment
Environmental Monitoring
No external components required
Shutdown mode to minimize power consumption
Up to eight LM75s can be connected to a single bus
Power up defaults permit stand-alone operation as
thermostat
UL Recognized Component (LM75B and LM75C)
LM75A
LM75B, LM75C
operating
shutdown
−25°C to 100°C
−55°C to 125°C
January 29, 2009
www.national.com
2.7V to 5.5V
3.0V to 5.5V
280 μA (typ)
1265801
±2°C (max)
±3°C (max)
4 μA (typ)

Related parts for LM75AIM/NOPB

LM75AIM/NOPB Summary of contents

Page 1

... The LM75A, LM75B and LM75C are available in an SOP-8 pacakage. The LM75B and LM75C are available in an MSOP-8 package. Simplified Block Diagram 2 I C® registered trademark of Philips Corporation. © 2009 National Semiconductor Corporation Applications ■ General System Thermal Management ■ Communications Infrastructure 2 C ® ...

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Connection Diagram Pin Descriptions Label Pin # SDA Serial Bi-Directional Data Line. Open Drain. SCL Clock Input O.S. 3 Overtemperature Shutdown. Open Drain Output GND 4 Power Supply Ground +V 8 Positive ...

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Ordering Information Package Order Number Marking LM75AIM LM75AIM LM75AIMX LM75AIM LM75BIM-3 LM75BIM-3 LM75BIMX-3 LM75BIM-3 LM75BIMM-3 T01B LM75BIMMX-3 T01B LM75BIM-5 LM75BIM-5 LM75BIMX-5 LM75BIM-5 LM75BIMM-5 T00B LM75BIMMX-5 T00B LM75CIM-3 LM75CIM-3 LM75CIMX-3 LM75CIM-3 LM75CIMM-3 T01C LM75CIMMX-3 T01C LM75CIM-5 LM75CIM-5 LM75CIMX-5 LM75CIM-5 LM75CIMM-5 T00C ...

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Absolute Maximum Ratings Supply Voltage Pin (+ Voltage at A0, A1and A2 Pins Voltage at OS, SCL and SDA Pins Input Current at any Pin (Note 2) Package Input Current (Note 2) Storage Temperature ESD Susceptibility (Note 4) ...

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Logic Electrical Characteristics DIGITAL DC CHARACTERISTICS Unless otherwise noted, these specifications apply for +V LM75BIMM-5, LM75CIM-5, and LM75CIMM-5; and +V (Note 6). Boldface limits apply for T Symbol Parameter V Logical “1” Input Voltage IN(1) V Logical “0” Input Voltage ...

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Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating the device beyond its rated operating conditions. Note 2: When the input voltage (V ) ...

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FIGURE 2. Temperature-to-Digital Transfer Function (Non-linear scale for clarity) FIGURE 3. Printed Circuit Board Used for Thermal Resistance Specifications 1265805 1265806 7 www.national.com ...

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Typical Performance Characteristics Static Quiescent Current vs Temperature (LM75C) Accuracy vs Temperature (LM75C) www.national.com Dynamic Quiescent Current vs Temperature (LM75C) 1265816 1265818 8 1265817 ...

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Functional Description The LM75 temperature sensor incorporates a band-gap type temperature sensor and 9-bit ADC (Sigma-Delta Analog-to- Digital Converter). The temperature data output of the LM75 is available at all times via the bus ...

Page 10

Note 14: These interrupt mode resets of O.S. occur only when LM75 is read or placed in shutdown. Otherwise, O.S. would remain active indefinitely for any event. FIGURE 4. O.S. Output Temperature Response Diagram 1.4 TEMPERATURE DATA FORMAT Temperature data ...

Page 11

O.S. POLARITY The O.S. output can be programmed via the configuration register to be either active low (default mode), or active high. In active low mode the O.S. output goes low when triggered 1.10 INTERNAL REGISTER STRUCTURE There are ...

Page 12

POINTER REGISTER (Selects which registers will be read from or written to P0-P1: Register Select P3–P7: Must be kept zero. 1.12 TEMPERATURE REGISTER (Read Only): D15 D14 D13 D12 D11 MSB ...

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Application Hints To get the expected results when measuring temperature with an integrated circuit temperature sensor like the LM75 important to understand that the sensor measures its own die temperature. For the LM75, the best thermal path ...

Page 16

FIGURE 10. Temperature Sensor with Loudmouth Alarm (Barking Watchdog) www.national.com FIGURE 9. Simple Thermostat, Interface Optional 16 1265814 1265815 ...

Page 17

Physical Dimensions inches (millimeters) unless otherwise noted 8-Lead (0.150 Wide) Molded Small Outline Package (SOP), JEDEC Order Number LM75AIM, LM75AIMX, LM75CIM-3, LM75CIMX-3, LM75CIM-5, LM75CIMX-5, LM75BIM-3, LM75BIMX-3, LM75BIM-5, or LM75BIMX-5 8-Lead Molded Mini Small Outline Package (MSOP) Order Number LM75CIMM-3, LM75CIMMX-3, ...

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... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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