SPI/MICROWIRE™ 13-Bit Plus Sign Temperature Sensor
The LM71 is a low-power, high-resolution digital temperature
sensor with an SPI and MICROWIRE compatible interface,
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
temperature. Its low operating current is useful in systems
where low power consumption is critical.
The LM71 has 13-bit plus sign temperature resolution
(0.03125˚C per LSB) while operating over a temperature
range of −40˚C to +150˚C.
The LM71’s 2.65V to 5.5V supply voltage range, fast con-
version rate, low supply current, and simple SPI interface
make it ideal for a wide range of applications.
n System Thermal Management
n Personal Computers
n Portable Electronic Devices
n Disk Drives
n Office Electronics
n Electronic Test Equipment
n Vending Machines
n SOT23-5 or No-Pull-Back LLP-6 Packages
n Operates over a full −40˚C to +150˚C range
n SPI and MICROWIRE Bus interface
j Supply Voltage
j Supply Current
2.65V to 5.5V
300 µA (typ)
550 µA (max)
−10˚C to +65˚C
−40˚C to 150˚C
+3/− 2˚C (max)
Simplified Block Diagram
MICROWIRE™ is a trademark of National Semiconductor Corporation.
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation DS200317