LM73 ±1°C Temperature Sensor with I2C/SMBus Interface | TI.com

LM73 (ACTIVE)

±1°C Temperature Sensor with I2C/SMBus Interface

±1°C Temperature Sensor with I2C/SMBus Interface - LM73
 

Description

The LM73 is an integrated, digital-output temperature sensor featuring an incremental Delta-Sigma ADC with a two-wire interface that is compatible with the SMBus and I2C interfaces. The host can query the LM73 at any time to read temperature.

Available in a 6-pin SOT package, the LM73 occupies very little board area while operating over a wide temperature range (–40°C to 150°C) and providing ±1°C accuracy from –10°C to 80°C. The user can optimize between the conversion time and the sensitivity of the LM73 by programming it to report temperature in any of four different resolutions. Defaulting to 11-bit mode (0.25°C/LSB), the LM73 measures temperature in a maximum time of 14 ms, making it ideal for applications that require temperature data very soon after power-up. In its maximum resolution, 14-bit mode (0.03125°C/LSB), the LM73 is optimized to sense very small changes in temperature.

A single multi-level address line selects one of three unique device addresses. An open-drain ALERT output goes active when the temperature exceeds a programmable limit. Both the data and clock lines are filtered for excellent noise tolerance and reliable communication. Additionally, a time-out feature on the clock and data lines causes the LM73 to automatically reset these lines if either is held low for an extended time, thus exiting any bus lock-up condition without processor intervention.

Features

  • Single Address Pin Offers Choice of Three
    Selectable Addresses Per Version for a Total of
    Six Possible Addresses.
  • SMBus and I2C-compatible Two-Wire Interface
  • Supports 400-Khz Operation
  • Shutdown Mode With One-shot Feature Available
    for Very Low Average Power Consumption
  • Programmable Digital Temperature Resolution
    From 11 Bits to 14 Bits
  • Fast Conversion Rate Ideal for Quick Power Up
    and Measuring Rapidly Changing Temperature
  • Open-Drain ALERT Output Pin Goes Active When
    Temperature is Above a Programmed
    Temperature Limit
  • Very Stable, Low-noise Digital Output
  • UL Recognized Component
  • Key Specifications
    •  Supply Current
      • Operating
        • 320 µA (Typical)
        • 495 µA (Maximum)
      • Shutdown
        • 8 µA (Maximum)
        • 1.9 µA (Typical)
    • Temperature Accuracy
      • −10°C to 80°C: ±1.0°C (Maximum)
      • −25°C to 115°C: ±1.5°C (Maximum)
      • −40°C to 150°C: ±2°C (Maximum)
    • Resolution
      • 0.25°C to 0.03125°C
    • Conversion Time
      • 11-Bit (0.25°C): 14 ms (Maximum)
      • 14-Bit (0.03125°C): 112 ms (Maximum)

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Parametrics Compare all products in Digital Temperature Sensors

 
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)
LM73 TMP100 TMP101
Local     Local     Local    
I2C, SMBus, 2-Wire     I2C, SMBus, 2-Wire     I2C, SMBus, 2-Wire    
1     2     2    
14     12     12    
-40 to 150     -55 to 125     -55 to 125    
2.7     2.7     2.7    
5.5     5.5     5.5    
550     75     75    
Configurable Resolution
Programmable Alert
One-Shot Conversion
Shutdown
UL Recognized    
Configurable Resolution
One-Shot Conversion
Shutdown    
Configurable Resolution
Programmable Alert
Fault Queue
One-Shot Conversion
Shutdown    
0     0     0    
6     8     3    
Catalog     Catalog     Catalog    
SOT-23-THIN     SOT-23     SOT-23    
6SOT-23-THIN: 8 mm2: 2.8 x 2.9(SOT-23-THIN)     6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)     6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)    

Other qualified versions of LM73

Version Part Number Definition
Automotive LM73-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects