LM75AD

Digital temperature sensor and thermal watchdog


Quick ordering

DistributorIn Stock
OR:  

The LM75A is a temperature-to-digital converter using an on-chip band gap temperature sensor and Sigma-delta A-to-D conversion technique. The device is also a thermal detector providing an overtemperature detection output. The LM75A contains a number of data registers: Configuration register (Conf) to store the device settings such as device operation mode, OS operation mode, OS polarity and OS fault queue as described in Section 7 "Functional description"; temperature register (Temp) to store the digital temp reading, and set-point registers (Tos and Thyst) to store programmable overtemperature shutdown and hysteresis limits, that can be communicated by a controller via the 2-wire serial I²C-bus interface. The device also includes an open-drain output (OS) which becomes active when the temperature exceeds the programmed limits. There are three selectable logic address pins so that eight devices can be connected on the same bus without address conflict.

The LM75A can be configured for different operation conditions. It can be set in normal mode to periodically monitor the ambient temperature, or in shutdown mode to minimize power consumption. The OS output operates in either of two selectable modes: OS comparator mode or OS interrupt mode. Its active state can be selected as either HIGH or LOW. The fault queue that defines the number of consecutive faults in order to activate the OS output is programmable as well as the set-point limits.

The temperature register always stores an 11-bit 2's complement data giving a temperature resolution of 0.125 Cel. This high temperature resolution is particularly useful in applications of measuring precisely the thermal drift or runaway.

The device is powered-up in normal operation mode with the OS in comparator mode, temperature threshold of 80 Cel and hysteresis of 75 Cel, so that it can be used as a stand-alone thermostat with those pre-defined temperature set points.

Features and benefits

  • Pin-for-pin replacement for industry standard LM75 and offers improved temperature resolution of 0.125 Cel and specification of a single part over power supply range from 2.8 V to 5.5 V
  • Small 8-pin package types: SO8 and TSSOP8
  • I²C-bus interface with up to 8 devices on the same bus
  • Power supply range from 2.8 V to 5.5 V
  • Temperatures range from -55 Cel to +125 Cel
  • 11-bit ADC that offers a temperature resolution of 0.125 Cel
  • Temperature accuracy of:
    • +-2 Cel from -25 Cel to +100 Cel
    • +-3 Cel from -55 Cel to +125 Cel
  • Programmable temperature threshold and hysteresis set points
  • Supply current of 3.5 uA in shutdown mode for power conservation
  • Stand-alone operation as thermostat at power-up
  • ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

Applications

  • System thermal management
  • Personal computers
  • Electronics equipment
  • Industrial controllers
All information on this product information page is subject to the subsequent disclaimers:
Go to the parametric search
Parametric search

Show functional diagram

Block diagram: LM75AD, LM75ADP
Block diagram: LM75AD, LM75ADP
Block diagram: LM75AD, LM75ADP
Block diagram: LM75AD, LM75ADP

Demo boards

OM13491OM13491

Surface Mount to DIP Evaluation Board OM13491


Parametrics of this product

Type numberPackage versionRemarksStandby current (uA)Operating Temperature (Cel)I2C-bus controlledPart typeAccuracy on-chip (±°C)Operating voltage (VDC)Assignable addressesSMBus clock (kHz)
LM75ADSOT96-1Extended temperature range, temperature to digital converter, programmable threshold3-55~1252.8~5.5Supervisor, Temperature2@-25~100?3@-55~1252.8~5.58400

Package

Type numberPackageOutline versionReflow-/Wave solderingPackingProduct statusMarkingOrderable part number, (Ordering code (12NC))
LM75ADSO8
(SOT96-1)
sot096-1_poSO-SOJ-REFLOW
SO-SOJ-WAVE
Tape reel smdVolume productionLM75ALM75AD,118
( 9352 697 75118 )
Bulk PackVolume productionLM75ALM75AD,112
( 9352 697 75112 )

The variants in the table below are discontinued. See the table Discontinuation information at the bottom of this page for more information.

Type numberPackageOutline versionReflow-/Wave solderingPackingProduct statusMarkingOrderable part number, (Ordering code (12NC))
LM75AD/DGSO8
(SOT96-1)
sot096-1_poSO-SOJ-REFLOW
SO-SOJ-WAVE
Tape reel smdDiscontinued
Replacement product
LM75ALM75AD/DG,118
( 9352 886 96118 )

Discontinuation information

Type numberOrdering code (12NC)Last-time buy dateLast-time delivery dateReplacement productDN NoticeStatusComments
LM75AD/DG93528869611831-Dec-1330-Jun-14LM75ADDN NXP-DN_201306022DNVersion WithdrawalReplacement is drop in.

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFR (FIT)MTBF (hour)MSLMSL LF
LM75ADLM75AD,118LM75ADweek 17, 20052.05E811
LM75ADLM75AD,112LM75ADweek 17, 20052.05E811

The variants in the table below are discontinued. See the table Discontinuation information at the bottom of this page for more information.

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFR (FIT)MTBF (hour)MSLMSL LF
LM75AD/DGLM75AD/DG,118LM75AD/DGAlways Pb-free2.05E811
Quality and reliability disclaimer

Quality and reliability disclaimer

Important Legal Notice on the product/generic quality information, No Warranty

NXP Semiconductors is providing this data for your convenience only. Please note however that NO WARRANTY, REPRESENTATION, GUARANTEE OR LEGALLY BINDING PRODUCT DESCRIPTION is provided by publishing this informational data, nor does NXP Semiconductors acknowledge or accept any liability related thereto. The documentation and data on NXP Semiconductors products can be found in the data sheets as officially published by NXP Semiconductors. For all purchase of products from NXP Semiconductors the NXP Semiconductors' General Terms and Conditions of Commercial Sale will apply.

NXP SEMICONDUCTORS PROVIDES THE DATA HEREUNDER “AS IS” WITHOUT WARRANTY WHATSOEVER. NXP SEMICONDUCTORS DOES NOT WARRANT OR REPRESENT THAT ANY DATA PROVIDED ON THIS WEBSITE IS CORRECT OR FIT FOR A PARTICULAR PURPOSE WHATSOEVER. IT IS PROVIDED WITHOUT ANY WARRANTY WHATSOEVER, WHETHER EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, COMPLETENESS NONINFRINGEMENT OF INTELLECTUAL PROPERTY OR OTHERWISE AND MAY BE CHANGED, MODIFIED OR DELETED BY NXP SEMICONDUCTORS AT ANY TIME.

Any use of the data provided hereunder is at your own risk.

IN NO EVENT SHALL NXP SEMICONDUCTORS, BE LIABLE FOR ANY DIRECT, SPECIAL, INDIRECT, CONSEQUENTIAL, PUNITIVE, OR INCIDENTAL DAMAGES (INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS OF BUSINESS, BUSINESS INTERRUPTION, LOSS OF USE, LOSS OF DATA OR INFORMATION, AND THE LIKE) ARISING OUT OF THE USE OF THE DATA, WHETHER OR NOT BASED ON TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY, BREACH OF CONTRACT, BREACH OF WARRANTY OR ANY OTHER THEORY, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. NOTWITHSTANDING ANY DAMAGES THAT YOU MIGHT INCUR FOR ANY REASON WHATSOEVER (INCLUDING, WITHOUT LIMITATION, ALL DAMAGES REFERENCED ABOVE AND ALL GENERAL DAMAGES), THE ENTIRE LIABILITY OF NXP SEMICONDUCTORS, AND YOUR EXCLUSIVE REMEDY FOR ALL OF THE FOREGOING SHALL BE LIMITED TO ACTUAL DAMAGES INCURRED BY YOU BASED ON REASONABLE RELIANCE UP TO ONE DOLLARS (US$1.00). THE FOREGOING LIMITATIONS, EXCLUSIONS AND DISCLAIMERS SHALL APPLY TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, EVEN IF ANY REMEDY FAILS OF ITS ESSENTIAL PURPOSE.

Your use of this data, and all consequences of such use, is solely your responsibility. You must perform sufficient engineering and additional qualification testing in order to properly evaluate your application and determine whether a candidate NXP Semiconductors device is suitable for use in that application.

NXP Semiconductors' products are specifically designed and manufactured to be used within the electrical, thermal, mechanical and other parameters set forth in NXP Semiconductors' data sheets. Quality and reliability data provided by NXP Semiconductors, such as MTBF, MSL and FIT, is intended to be a non-binding estimate of product performance based upon diffusion process, history only. It does not imply that any performance levels reflected in such data can be met if the product is operated outside the conditions expressly stated in the latest published data sheet for a device or in your application.

The RoHS data provided hereunder is preliminary and non binding for NXP Semiconductors. NXP Semiconductors does not accept any liability related to this data.

NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in medical, military, aircraft, space or life support equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage nor for any other use that is not explicitly agreed between the parties. NXP Semiconductors accepts no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer's own risk.

Any use of NXP Semiconductors' products beyond the scope defined in the current NXP Semiconductors' data sheet voids all warranty responsibility of NXP Semiconductors with respect to such devices, and also voids all responsibility of NXP Semiconductors with respect to any applications assistance, product design, software performance or services of any kind that were or may have been performed in connection with the sale of any such devices.

Further, resale of NXP Semiconductors' products or services with statements different from or beyond the parameters stated by NXP Semiconductors for that product in official NXP Semiconductors data sheets, or without the warnings or instructions provided by NXP Semiconductors, voids all express and any implied warranties for the associated NXP Semiconductors product or service, and is an unfair and deceptive business practice.

Discontinuation information

Type numberOrdering code (12NC)Last-time buy dateLast-time delivery dateReplacement productDN NoticeStatusComments
LM75AD/DG93528869611831-Dec-1330-Jun-14LM75ADDN NXP-DN_201306022DNVersion WithdrawalReplacement is drop in.

Documentation for this product

File nameTitleTypeFormatDate
LM75ADigital temperature sensor and thermal watchdogData sheetpdf2007-07-10
AN10441Level shifting techniques in I2C-bus designApplication notepdf2007-06-20
AN10216I2C manualApplication notepdf2003-03-27
AN10146I2C 2002-1A Evaluation BoardApplication notepdf2003-02-26
75016543Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for major home appliancesBrochurepdf2008-06-01
75016531Evaluate the I2C-bus with a comprehensive kit; NXP I2C 2002-1A evaluation board kits OM6285 and OM6278Leafletpdf2008-07-01
75017424NXP I2C-bus solutions 2013: Smart, simple solutions for the 12 most common design concernsLeafletpdf2013-05-23
design_con_2003_tecforum_i2c_bus_overviewDesignCon 2003 TecForum I 2 C Bus OverviewOther typepdf2003-01-27
75015693I2C-bus temperature sensors; Small, accurate, low-cost sensors for advanced temperature regulationSelection guidepdf2006-11-01
UM10204I2C-bus specification and user manualUser manualpdf2014-04-07
UM10206I2C Demonstration Board 2005-1 Quick Start GuideUser manualpdf2006-06-12
UM10204_JAI2C-bus specification and user manualUser manualpdf2013-04-03
SOT96-1_115Tape reel SMD; standard product orientation 12NC ending 115Packingpdf2012-11-23
SOT96-1_118SO8; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packingpdf2013-04-19
sot096-1_poplastic small outline package; 8 leads; body width 3.9 mmOutline drawingpdf2009-10-08
SO-SOJ-REFLOWFootprint for reflow solderingReflow solderingpdf2009-10-08
SO-SOJ-WAVEFootprint for wave solderingWave solderingpdf2009-10-08
Wave_Soldering_ProfileWave Soldering ProfileWave solderingpdf2013-09-30

Ordering & availability

Type numberOrdering code (12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
LM75AD9352 697 75118LM75AD,118NAFuture Electronics77,500250004/14/2014Buy online 
   EUAvnet Express27,500250004/15/2014Buy online 
   ASIAWPI20,050250004/16/2014Buy online 
   NADigiKey12,64714/15/2014Buy online 
   ASIAChip One Stop2,09504/15/2014Buy online 
   NAMOUSER ELECTRONICS1,6684/15/2014Buy online 
LM75AD9352 697 75112LM75AD,112NAFuture Electronics11,070104/14/2014Buy onlinenot available
   NADigiKey3,72014/15/2014Buy online 
   NAAvnet Express1,071104/15/2014Buy online 
   NAMOUSER ELECTRONICS3274/15/2014Buy online 

Sample

Sample orders normally take 2-4 days for delivery.
If you do not have a direct account with NXP our network of global and regional distributors is available and equipped to support you with NXP samples. As a NXP customer you also have the option to order samples via our sales organisation.

Demo boards

OM13491
OM13491

Surface Mount to DIP Evaluation Board OM13491

Technical support

Do you want to ask technical questions to an NXP expert?
Please select one of the following options:

How to search?

Already registered to MyNXP? or Register

Feedback

Restricted Document

You are accessing a password protected document.
Please choose an option below

Fill in your name, company and e-mail address and you will receive an e-mail with a username and password for this restricted document.

First name*

Last name*

Company*

E-mail*

Comments

* required.

Print password request form:

Before we can grant you access to our confidential documents you are required to fill in, print and sign the password request form by which you comply with the NXP Non-disclosure agreement (NDA). Please email or fax the signed form to the email-address or fax-number specified on the form. After approval you will receive username and password via email. In case you already signed an NDA with NXP and already have username and password, you can skip this step.

Open document:

If you have received the username and password, you can open the document by clicking on the "open document" link. You will be prompted for username and password. After you fill in the username and password the download will start.

Forgot your password:

In case you forgot your password you can click on the "forgot your password" link to retrieve your password. Please complete the small form with your personal details and your request will be sent to NXP. You will receive an answer with your password shortly.

Request secure documentation

Fill in your name, company and e-mail address and you will receive an e-mail with a username and password for this secure document.

First name*

Last name*

Company*

E-mail*

Comments

* required.

Datasheet confidential

Fill in your details and you will be contacted

First name*

Last name*

Company*

Country*

Telephone number*

E-mail*

* required.

Your e-mail address will only be used to send the datasheet and will not be used for any other purposes.

No full datasheet available

Fill in your details to receive notification when the datasheet becomes available

First name*

Last name*

Company*

E-mail*

* required.

Your email address will only be used to send the datasheet and will not be used for any other purposes.