±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)
Operating Temperature Range (C)
Supply Voltage (Min) (V)
Supply Voltage (Max) (V)
Supply Current (Typ) (uA)
Supply Current (Max) (uA)
Special Features
Package Group
Estimated Package Size (WxL) (mm2)
Approx. Price (US$)
Iq (Typ) (uA)
LM71 LM71-Q1 LM73
SPI, Microwire     SPI, Microwire     I2C, SMBus, 2-Wire    
1.5     1.5     1    
14     14     14    
-40 to 150     -40 to 150     -40 to 150    
2.65     2.65     2.7    
5.5     5.5     5.5    
300     300     320    
550     550     550    
Shutdown     Shutdown     Configurable Resolution
Programmable Alert
One-Shot Conversion
NA     NA     6    
Catalog     Automotive     Catalog    
SOT-23     SOT    
6WSON: 3 x 3: 9 mm2
5SOT-23: 1.6 x 2.9: 10 mm2    
5SOT-23: 1.6 x 2.9: 10 mm2     6SOT: 1.6 x 2.9: 10 mm2    
0.71 | 1ku     0.86 | 1ku     0.75 | 1ku    
300     300     320    

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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