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13-Bit Plus Sign Temperature Sensor
February 2005
LM71
SPI/MICROWIRE 13-Bit Plus Sign Temperature Sensor
General Description
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藲C per LSB) while operating over a temperature
range of 鈭?0藲C to +150藲C.
The LM71鈥檚 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.
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Electronic Test Equipment
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Vending Machines
Features
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SOT23-5 or No-Pull-Back LLP-6 Packages
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Operates over a full 鈭?0藲C to +150藲C range
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SPI and MICROWIRE Bus interface
Key Specifications
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Supply Voltage
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Supply Current
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Temperature
2.65V to 5.5V
operating
300 碌A(chǔ) (typ)
550 碌A(chǔ) (max)
Applications
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System Thermal Management
Personal Computers
Portable Electronic Devices
Disk Drives
Office Electronics
Accuracy
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Temperature
鈭?0藲C to +65藲C
鈭?0藲C to 150藲C
鹵
1.5藲C (max)
+3/鈭?2藲C (max)
31.25 m藲C
Resolution
Simplified Block Diagram
20031701
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漏 2005 National Semiconductor Corporation
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