±1.5°C Temperature Sensor with SPI Interface - LM71


±1.5°C Temperature Sensor with SPI Interface


The LM71 is a low-power, high-resolution digital temperature sensor with an SPI and MICROWIRE compatible interface, available in the 5-pin SOT-23 or the 6-pin WSON (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 conversion rate, low supply current, and simple SPI interface make it ideal for a wide range of applications. The LM71Q is available in the 5-lead SOT-23 package only.


  • LM71Q is AEC-Q100 Grade 0 Qualified and is Manufactured on an Automotive Grade Flow
  • 5-Pin SOT-23 Package or 6-Pin No-Pull-Back WSON Package
  • Operates Over a Full −40°C to +150°C Range
  • SPI and MICROWIRE Bus Interface

Key Specifications

  • Supply Voltage: 2.65V to 5.5V
  • Supply Current
    • Operating: 300 µA (typ)
    • 550 µA (max)
  • Temperature Accuracy
    • −10°C to +65°C: ±1.5°C (max)
    • −40°C to 150°C: +3/− 2°C (max)
  • Termperature Resolution: 31.25 m°C

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Parametrics Compare all products in Digital Output

Local Sensor Accuracy (Max) (+/- C)
Temp Resolution (Max) (bits)
Supply Voltage (Min) (V)
Supply Voltage (Max) (V)
Supply Current (Max) (uA)
Programmable Alert
Special Features
Operating Temperature Range (C)
Approx. Price (US$)
LM71 LM71-Q1 LM73
1.5     1.5     1    
14     14     14    
2.65     2.65     2.7    
5.5     5.5     5.5    
550     550     495    
SPI     SPI     I2C
No     No     Yes    
Yes     Yes     Yes    
    One Shot Conversion Control    
Catalog     Automotive     Catalog    
-40 to 150     -40 to 150     -40 to 150    
5SOT-23     6SOT    
0.71 | 1ku     0.86 | 1ku     0.75 | 1ku    

Other qualified versions of LM71

Version Part Number Definition
Automotive LM71-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
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