LM74 ±1.25°C Temperature Sensor with SPI Interface | TI.com

LM74 (ACTIVE) ±1.25°C Temperature Sensor with SPI Interface

 

Description

The LM74 is a temperature sensor, Delta-Sigma analog-to-digital converter with an SPI and MICROWIRE compatible interface. The host can query the LM74 at any time to read temperature. A shutdown mode decreases power consumption to less than 10 μA. This mode is useful in systems where low average power consumption is critical.

The LM74 has 12-bit plus sign temperature resolution (0.0625°C per LSB) while operating over a temperature range of −55°C to +150°C.

The LM74's 3.0V to 5.5V supply voltage range, low supply current and simple SPI interface make it ideal for a wide range of applications. These include thermal management and protection applications in hard disk drives, printers, electronic test equipment, and office electronics. The LM74 is available in the SOIC package as well as the 5-Bump DSBGA package.

Features

  • 0.0625°C Temperature Resolution
  • Shutdown Mode Conserves Power Between Temperature Reading
  • SPI and MICROWIRE Bus Interface
  • 5-Bump DSBGA Package Saves Space

Key Specifications

  • Supply Voltage 3.0V or 2.65V to 5.5V
  • Supply Current
    • Operating265μA (typ)520μA (max)
    • Shutdown3μA (typ)
  • Temperature Accuracy
    • −10°C to 65°C, ±1.25°C(max)
    • −25°C to 110°C, ±2.1°C(max)
    • −55°C to 125°C, ±3°C(max)

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Parametrics

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Part number Order Device type Interface Local sensor accuracy (Max) (+/- C) Temp resolution (Max) (bits) Operating temperature range (C) Supply voltage (Min) (V) Supply voltage (Max) (V) Supply current (Max) (uA) Features Remote channels (#) Addresses Rating Package Group Package size: mm2:W x L (PKG)
LM74 Order now Local     SPI, Microwire     1.25     13     -40 to 125
-55 to 150    
2.65
3    
5.5     470     Shutdown     0         Catalog     DSBGA | 5
SOIC | 8    
See datasheet (DSBGA)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)    
LM70 Order now Local     SPI, Microwire     2     11     -55 to 150     2.65     5.5     490     Shutdown
UL Recognized    
0         Catalog     VSSOP | 8
WSON | 8    
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)
8WSON: 9 mm2: 3 x 3 (WSON | 8)