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LM94023_15

更新时间： 2024-01-07 17:16:40
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德州仪器 - TI /
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19页 919K
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1.5V, micro SMD, Dual-Gain Analog Temperature Sensor with Class AB Output

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LM94023_15 数据手册

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LM94023  
www.ti.com  
SNIS150B –SEPTEMBER 2008–REVISED JUNE 2013  
1.5V, micro SMD, Dual-Gain Analog Temperature Sensor with Class AB Output  
Check for Samples: LM94023  
1
FEATURES  
DESCRIPTION  
The LM94023 is a precision analog output CMOS  
integrated-circuit temperature sensor that operates at  
a supply voltage as low as 1.5 Volts. Available in the  
very small four-bump DSBGA 0.8mm x 0.8mm) the  
LM94023 occupies very little board area. A class-AB  
output structure gives the LM94023 strong output  
source and sink current capability for driving heavy  
loads, making it well suited to source the input of a  
sample-and-hold analog-to-digital converter with its  
transient load requirements, This generally means the  
LM94023 can be used without external components,  
like resistors and buffers, on the output. While  
operating over the wide temperature range of −50°C  
to +150°C, the LM94023 delivers an output voltage  
that is inversely porportional to measured  
temperature. The LM94023's low supply current  
makes it ideal for battery-powered systems as well as  
general temperature sensing applications.  
2
•
Low 1.5V Operation  
•
Push-pull Output with 50µA Source Current  
Capability  
•
•
Two Selectable Gains  
Very Accurate Over Wide Temperature Range  
of −50°C to +150°C  
•
•
•
•
Low Quiescent Current  
Output is Short-circuit Protected  
Extremely Small DSBGA Package  
Footprint Compatible with the Industry-  
standard LM20 Temperature Sensor  
APPLICATIONS  
•
•
•
•
•
•
•
Cell Phones  
Wireless Transceivers  
Battery Management  
Automotive  
A Gain Select (GS) pin sets the gain of the  
temperature-to-voltage output transfer function. Either  
of two slopes are selectable: −5.5 mV/°C (GS=0) or  
−8.2 mV/°C (GS=1). In the lowest gain configuration,  
the LM94023 can operate with a 1.5V supply while  
measuring temperature over the full −50°C to +150°C  
operating range. Tying GS high causes the transfer  
function to have the largest gain for maximum  
temperature sensitivity. The gain-select inputs can be  
tied directly to VDD or Ground without any pull-up or  
pull-down resistors, reducing component count and  
board area. These inputs can also be driven by logic  
signals allowing the system to optimize the gain  
during operation or system diagnostics.  
Disk Drives  
Games  
Appliances  
KEY SPECIFICATIONS  
•
•
•
•
Supply Voltage 1.5V to 5.5V  
Supply Current 5.4 μA (typ)  
Output Drive ±50 μA  
Temperature Accuracy  
–
–
–
–
20°C to 40°C ±1.5°C  
–50°C to 70°C ±1.8°C  
–50°C to 90°C ±2.1°C  
–50°C to 150°C ±2.7°C  
Connection Diagram  
GND  
(A2)  
V
DD  
(B2)  
•
Operating Temperature −50°C to 150°C  
GS  
(A1)  
V
OUT  
(B1)  
Connections  
(Top View)  
Figure 1. DSBGA  
Top View  
See Package Number YFQ0004  
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 © 2008–2013, Texas Instruments Incorporated  
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