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LM95172_15

更新时间： 2024-11-25 01:11:35
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13-Bit to 16-Bit 200°C Digital Temp Sensor with 3-Wire Interface

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LM95172  
www.ti.com  
SNOSB33B –DECEMBER 2009–REVISED MARCH 2013  
LM95172 13-Bit to 16-Bit 200°C Digital Temp Sensor with 3-Wire Interface  
Check for Samples: LM95172  
1
FEATURES  
•
Conversion Time  
–
–
13-bit mode 43 ms (max)  
16-bit mode 350 ms (max)  
2
•
LM95172EWG is AEC-Q100 Grade 0 Qualified  
and is Manufactured on an Automotive Grade  
Flow.  
DESCRIPTION  
•
13-Bit (0.0625°C LSB) to 16-Bit (0.0078125°C  
LSB) Temperature Resolution  
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.  
•
•
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  
The over-temperature alarm output (OVERTEMP)  
10-Pin Cerpack High-Temperature Ceramic  
Package  
asserts when the die temperature exceeds  
programmed THIGH limit. The user-programmed TLOW  
limit creates temperature-stabilizing hysteresis  
a
a
APPLICATIONS  
when the ambient temperature is near the trip point.  
•
•
•
•
•
Automotive High Temperature Applications  
Industrial Power Controllers  
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  
Industrial Motors, Gear Boxes  
Geothermal Instrumentation  
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.  
High Temperature Test Equipment  
KEY SPECIFICATIONS  
•
•
Analog and Digital Supply Voltage 3.0V to 5.5V  
Total Supply Current  
(typ)  
Operating 400 µA  
The high noise immunity of the Serial I/O (SI/O)  
output makes the LM95172EWG ideal for use in  
challenging electromagnetic environments.  
–
–
–
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)  
Connection Diagram  
•
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)  
1
10  
9
V
V
DD IO  
OVERTEMP  
SC  
2
3
DD ANALOG  
NC  
CS  
8
NC  
LM95172EWG  
4
5
7
SI/O  
NC  
•
Temperature Resolution  
GND  
6
–
–
13-bit mode 0.0625°C/LSB  
16-bit mode 0.0078125°C/LSB  
Figure 1. LM95172EWG- Top View  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2009–2013, Texas Instruments Incorporated  
1234567...22

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