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LM95172EWG10A PDF预览

LM95172EWG10A

更新时间： 2024-02-03 01:55:02
品牌 Logo 应用领域
美国国家半导体 - NSC 传感器温度传感器
页数 文件大小 规格书
22页 388K
描述
13-Bit to 16-Bit 200°C Digital Temp Sensor with 3-Wire Interface

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LM95172EWG10A 数据手册

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December 16, 2009  
LM95172  
13-Bit to 16-Bit 200°C Digital Temp Sensor with 3-Wire  
Interface  
General Description  
Features  
The LM95172EWG is an integrated digital-output tempera-  
ture sensor with a Serial Peripheral Interface (SPI) and MI-  
CROWIRE™-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 accu-  
racy from 120°C to 200°C, it is ideal for high-temperature  
applications.  
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  
The over-temperature alarm output (OVERTEMP) asserts  
when the die temperature exceeds a programmed THIGH limit.  
The user-programmed TLOW limit creates a temperature-sta-  
bilizing hysteresis when the ambient temperature is near the  
trip point.  
SPI and MICROWIRE Bus interface  
■
■
10-Pin Cerpack high-temperature ceramic package  
Key Specifications  
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 mon-  
itored to verify that the conversion is complete.  
3.0V to 5.5V  
■ꢀAnalog and Digital Supply Voltage  
■ꢀTotal Supply Current ꢀꢀꢀꢀOperating  
400 µA (typ)  
4 µA (max)  
Shutdownꢀ−40°C to +140°C  
Shutdownꢀ−40°C to +175°C  
Shutdownꢀ−40°C to +200°C  
12 µA (max)  
28 µA (max)  
■ꢀTemperature Accuracy  
The high noise immunity of the Serial I/O (SI/O) output makes  
the LM95172EWG ideal for use in challenging electromag-  
netic environments.  
+175°C to +200°C  
+130°C to +160°C  
+120°C to +130°C  
+160°C to +175°C  
−40°C to +120°C  
±3.0°C (max)  
±1.0°C (max)  
±2.0°C (max)  
±2.0°C (max)  
±3.5°C (max)  
Applications  
Automotive high temperature applications  
■
■
■
■
■ꢀTemperature Resolution  
Industrial Power Controllers  
13-bit mode  
0.0625°C/LSB  
Industrial motors, gear boxes  
16-bit mode 0.0078125°C/LSB  
Geothermal instrumentation  
■ꢀConversion Time  
High Temperature Test Equipment  
■
13-bit mode  
16-bit mode  
43 ms (max)  
350 ms (max)  
Connection Diagram  
LM95172EWG Top View  
30076602  
MICROWIRE™ is a trademark of National Semiconductor Corporation.  
TRI-STATE® is a registered trademark of National Semiconductor Corporation.  
© 2009 National Semiconductor Corporation  
300766  
www.national.com  
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