National LM71 Data Handbook
Summary
The LM71 is a specialized, low-power digital temperature sensor featuring high resolution and compatibility with SPI/MICROWIRE interfaces. Operating across an extreme range of -40°C to +150°C, it is engineered for rigorous thermal management in portable and embedded electronics. This technical manual provides comprehensive documentation detailing electrical specifications, pin configurations (SOT23/LLP), logical characteristics, and operational guidelines required by system design engineers.
Page 1 Text Content
查询LM71供应商
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LM I/M IC IR 13-B it lus ign Tem perature ensor
LM71 SPI/MICROWIRE™ 13-Bit Plus Sign Temperature Sensor
Electronic Test Equipment
General Description
Vending Machines
The LM71 is low-power, high-resolution digital temperature sensor with an SPI and MICROWIRE compatible interface,
Features
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 SOT23-5 or No-Pull-Back LLP-6 Packages
temperature. Its low operating current is useful in systems Operates over full −40˚C to +150˚C range where low power consumption is critical. SPI and MICROWIRE Bus interface The LM71 has 13-bit plus sign temperature resolution (0.03125˚C per LSB) while operating over temperature Key Specifications range of −40˚C to +150˚C.
Supply Voltage 2.65V to 5.5V
The LM71’s 2.65V to 5.5V supply voltage range, fast con-
version rate, low supply current, and simple SPI interface Supply Current operating µA (typ)
make it ideal for wide range of applications.
µA (max)
Temperature
Applications
Accuracy −10˚C to +65˚C ±1.5˚C (max)
System Thermal Management
−40˚C to 150˚C +3/− 2˚C (max)
Personal Computers
Temperature 31.25 m˚C
Portable Electronic Devices
Resolution
Disk Drives Office Electronics
Simplified Block Diagram
MICROWIRE™ is trademark of National Semiconductor Corporation. TRI-STATE® is registered trademark of National Semiconductor Corporation.
National Semiconductor Corporation DS200317 www.national.com
Page Summary Contents For National LM71 Data Handbook
Manual Details
| Brand | National |
|---|---|
| Pages | 13 |
| File Size | 234.22 KB |
| Published | June 15, 2026 |
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Frequently Asked Questions
What is the operating temperature range of the LM71 sensor?
The LM71 operates over a full temperature range from -40°C to +150°C.
What supply voltage does the device require?
The recommended supply voltage range for the LM71 is 2.65V to 5.5V.
Which communication bus interfaces are available?
The sensor supports both SPI and MICROWIRE compatible interfaces.
What is the temperature resolution of the device?
It has a 13-bit plus sign resolution, which corresponds to 0.03125˚C per LSB.