Features LM95172EWG is AEC-Q100 Grade 0 qualified and is manufactured on an Automotive Grade Flow. 13-bit (0.0625°C LSB) to 16-bit (0.0078125°C LSB) temperature resolution Wide −40°C to +200°C temperature range 35 ms best conversion time tracks fast temp changes ^OVERTEMP digital output switches when TDIE > THIGH Shutdown mode saves power yet wakes up for one-shot temperature update SPI and MICROWIRE Bus interface 10-Pin Cerpack high-temperature ceramic package Description The LM95172EWG is an integrated digital-output temperature sensor with a Serial Peripheral Interface (SPI) and MICROWIRE™-compatible interface in a 10-pin Cerpack high temperature ceramic package. It features a very linear Sigma-Delta Analog-to-Digital Converter (ADC), high accuracy, fast conversion rates, and extremely low output noise. With an operating temperature as low as -40°C and optimized accuracy from 120°C to 200°C, it is ideal for high-temperature applications. The over-temperature alarm output ( ^OVERTEMP) asserts when the die temperature exceeds a programmed THIGH limit. The user-programmed TLOW limit creates a temperature-stabilizing hysteresis when the ambient temperature is near the trip point. The LM95172EWG can be programmed to operate from 13 bits (0.0625°C per LSB) to 16 bits (0.0078125°C per LSB) resolution. The LM95172EWG powers up in 35 ms, the fastest conversion time, with temperature output set at 13-bit resolution. The resolution may then be changed to 14-, 15- or 16-bits. When in the 13-, 14- or 15-bit resolution mode, the least significant bit in the 16-bit temperature register toggles after the completion of each conversion. This bit may be monitored to verify that the conversion is complete. The high noise immunity of the Serial I/O (SI/O) output makes the LM95172EWG ideal for use in challenging electromagnetic environments. Key Specification ■  Analog and Digital Supply Voltage 3.0V to 5.5V ■  Total Supply Current        Operating 400 µA (typ) Shutdown  −40°C to +140°C 4 µA (max) Shutdown  −40°C to +175°C 12 µA (max) Shutdown  −40°C to +200°C 28 µA (max) ■  Temperature Accuracy   +175°C to +200°C ±3.0°C (max) +130°C to +160°C ±1.0°C (max) +120°C to +130°C ±2.0°C (max) +160°C to +175°C ±2.0°C (max) −40°C to +120°C ±3.5°C (max) ■  Temperature Resolution   13-bit mode 0.0625°C/LSB 16-bit mode 0.0078125°C/LSB ■  Conversion Time   13-bit mode 43 ms (max) 16-bit mode 350 ms (max) Applications Automotive high temperature applications Industrial Power Controllers Industrial motors, gear boxes Geothermal instrumentation High Temperature Test Equipment

Typical Application click for larger image	Block Diagram click for larger image Simplified Block Diagram

Parameters Values Temperature Accuracy (+/-) 1 deg C Supply Min 3 Volt Quiescent Current 0.4 mA Temperature Min -40 deg C Temperature Max 200 deg C Interface Type SPI/QSPI/Microwire Programmable Setpoints Yes TruTherm(TM) Beta Compensation No Resolution 16 bits Resolution degC/LSB 0.0078125 Supply Max 5.5 Volt Shut down Yes Interrupt Outputs 1 Fault Queue No AEC Q-100 Automotive Grade 0 Automotive No

Datasheets

Title		Size	Date	Other Language
	LM95172 13-Bit to 16-Bit 200°C Digital Temp Sensor with 3-Wire Interface	396 Kbytes	17-Dec-09

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM95172EWG/NOPB LM95172EWG RoHS Status	CERPACK	Full production Lead Time: 8 weeks	Distributor Region Qty ARROW Worldwide 13 AVNET-EM Worldwide 54 DIGI-KEY Worldwide 54 MOUSER Worldwide 54 TAYLOR Americas 13	$100.00 each at 100+ pcs	tray of 54
LM95172QA2 MDA RoHS Status		Full production Lead Time: N/A	Contact your distributor	CALL	tray of N/A

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM95172.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM95172 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM95172EWGEB	LM95172EWGEB is an evaluation board built around LM95172 high temperature sensor	Full production	Distributor Region Qty	CALL	N/A
Description: LM95172EWGEB in conjunction with SensorEval software provides a convenient and effective platform for study of functionality of LM95172 Temperature Sensor. While LM95172 is specified over extended temperature range, the LM95172EWGEB evaluation board is not suitable for high temperature operation. Upon request, however, National will provide a supplemental kit that facilitates the high temperature experimentation with LM95172. Contents: Assembled LM95172 Evaluation Board LM95172EWGEB Userguide LM95172 Datasheet

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM95172EWG/NOPB LM95172EWG	241.092	CERPACK	10	1 1	NA NA	Detail	Download	N/A	NSUZXYTT LM95172 EWG
LM95172QA2 MDA	N/A	Unpackaged Die				N/A	-

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM95172.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM95172 is located at RoHS Status.

CAD Symbols and Models Download LM95172 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM95172EWG	CMOS7	0	21301	0	0	1584000	3	449464325
LM95172QA2 MDA	CMOS7	0	21301	0	0	1584000	3	449464325

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. 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.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM95172.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM95172 is located at RoHS Status.

Energy Efficiency and Reliability in Automotive Systems Click image to play video in new window What's New in Power Management and Signal Path--January 2010 Loading video...

Energy Efficiency and Reliability in Automotive Systems Date: 2008-11-19 Length: 00:25:00 What's New in Power Management and Signal Path--January 2010 Date: 2010-02-05 Length: 0:03:00