LM71 - SPI/MICROWIRE™ 13-Bit Plus Sign Temperature Sensor from the PowerWise® Family

Datasheet Packaging Samples & Pricing Reliability Design Tools Application Notes Knowledge Base

Features
•SOT23-5 or No-Pull-Back LLP-6 Packages
•Operates over a full -40°C to +150°C range
•SPI and MICROWIRE Bus interface

Key Specification

Supply Voltage 2.65V to 5.5V
Supply Currentoperating300 µA (typ)
  550 µA (max)
Temperature Accuracy-10°C to +65°C±1.5°C (max)
 -40°C to 150°C+3/- 2°C (max)
Temperature Resolution 31.25 m°C

General Description

The LM71 is a low-power, high-resolution digital temperature sensor with an SPI and MICROWIRE compatible interface, available in the 5-pin SOT23 or the 6-pin LLP (no pull back) package. More...


Applications

•System Thermal Management
•Personal Computers
•Portable Electronic Devices
•Disk Drives
•Office Electronics
•Electronic Test Equipment
•Vending Machines
  Typical Application
click for larger image


Parametric Table     expand
Parametric Table    collapse
Temperature Accuracy (+/-) 1.5 deg C
Supply Min 2.65 Volt
Quiescent Current 0.55 mA
Temperature Min -40 deg C
Temperature Max 150 deg C
Interface Type SPI/Microwire
Temperature Accuracy (+/-) 1.5 deg C
Supply Min 2.65 Volt
Quiescent Current 0.55 mA
Temperature Min -40 deg C
Temperature Max 150 deg C
Interface Type SPI/Microwire
Programmable Setpoints No
Resolution 14 bit
Resolution degC/LSB 0.0325
Supply Max 5.5 Volt
Shut down Yes
Fault Queue No
Automotive Selection Guide Yes
PowerWise Yes
View Using Catalog


Typical Performance

click for larger image


  Also Recommended
LM73- - -

Additional Resources

Design Tools (see below)

Application Notes (see below)


Block Diagram

click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM71 SPI/MICROWIRE 13-Bit Plus Sign Temperature Sensor 630 Kbytes 2-Feb-05 View Online
Download
LM71 SPI/MICROWIRE 13-Bit Plus Sign Temperature Sensor (Japanese)
 376 Kbytes   Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LM71CIMFSOT-235STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.75reel
of
1000		T16C
XTT
6 weeks5000
LM71CIMFXSOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.75reel
of
3000		T16C
XTT
8 weeks7500
LM71CISDLLP6NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.75reel
of
1000		ZXYTT
L71CI
8 weeksN/A
LM71CISDXLLP6NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.75reel
of
4500		ZXYTT
L71CI
8 weeksN/A
LM71A MDAUnpackaged DieCustomN/A
  CALLtray
of
N/A		-
N/A40000

General Description

The LM71 is a low-power, high-resolution digital temperature sensor with an SPI and MICROWIRE compatible interface, available in the 5-pin SOT23 or the 6-pin LLP (no pull back) package. The host can query the LM71 at any time to read temperature. Its low operating current is useful in systems where low power consumption is critical.

The LM71 has 13-bit plus sign temperature resolution (0.03125°C per LSB) while operating over a temperature range of -40°C to +150°C.

The LM71's 2.65V to 5.5V supply voltage range, fast conversion rate, low supply current, and simple SPI interface make it ideal for a wide range of applications.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM * LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM71A MDACMOS7013906008625005244736730
LM71CIMFCMOS7013906008625005244736730
LM71CIMFXCMOS7013906008625005244736730
LM71CISDCMOS7013906008625005244736730
LM71CISDXCMOS7013906008625005244736730

Note: The Early Failure Rates were calculated as point estimates. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


Design Tools

TitleSize in Kbytes Date Click link below to Download    
SensorEval Software for Thermal Mangement Products 6 Kbytes 15-May-2008 View    

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More Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1155: Application Note 1155 A Simple Software I2C Routine for the COP8 82 Kbytes 12-May-00 Download
AN-41: Application Note 41 Precision IC Comparator Runs from +5V Logic Supply 150 Kbytes 2-Oct-02 Download
AN-1256: Application Note 1256 Tiny Temperature Sensors for Portable Systems 66 Kbytes 1-Oct-02 Download

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[Information as of 7-Jan-2009]