TMP451 1.7-V remote and local temperature sensor with N-factor, filtering and series-R correction | TI.com

TMP451
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1.7-V remote and local temperature sensor with N-factor, filtering and series-R correction

 

Description

The TMP451 device is a high-accuracy, low-power remote temperature sensor monitor with a built-in local temperature sensor. The remote temperature sensors are typically low-cost discrete NPN or PNP transistors, or substrate thermal transistors or diodes that are integral parts of microprocessors, microcontrollers, or FPGAs. The temperature is represented as a 12-bit digital code for both the local and remote sensors, giving a resolution of 0.0625°C. The temperature accuracy is ±1°C (maximum) in the typical operating range for the local and the remote temperature sensors. The two-wire serial interface accepts the SMBus communication protocol.

Advanced features such as series resistance cancellation, programmable nonideality factor (η-factor), programmable offset, programmable temperature limits, and a programmable digital filter are combined to provide a robust thermal monitoring solution with improved accuracy and noise immunity.

The TMP451 device is ideal for high-accuracy temperature measurements in multiple locations and in a variety of automotive subsystems. The device is specified for operation over a supply voltage range of 1.7 V to 3.6 V and a temperature range of –40°C to 125°C.

Features

  • ±1°C Accuracy for Local and Remote Diode Sensors
  • 0.0625°C Resolution for Local and Remote Channels
  • 1.7-V to 3.6-V Supply and Logic Voltage Range
  • 27-µA Operating Current, 3-µA Shutdown Current
  • Series Resistance Cancellation
  • η-Factor and Offset Correction
  • Programmable Digital Filter
  • Diode Fault Detection
  • Two-Wire and SMBus™ Serial Interface
  • 8-Lead WSON (WDFN) Package

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)
TMP451 Order now Remote     I2C, SMBus, 2-Wire     1     12     -40 to 125     1.7     3.6     40     Dynamic Averaging
Programmable Alert
Shutdown    
1     1     Catalog     WSON | 8     8WSON: 4 mm2: 2 x 2 (WSON | 8)    
TMP411 Order now Remote     I2C, SMBus, 2-Wire     2.5     12     -40 to 125     2.7     5.5     30     Programmable Alert
Shutdown    
1     4     Catalog     SOIC | 8
VSSOP | 8    
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
TMP421 Order now Remote     I2C, SMBus, 2-Wire     2.5     12     -40 to 125     2.7     5.5     38     Shutdown     1     9     Catalog     DSBGA | 8
SOT-23 | 8    
8DSBGA: 3 mm2: 2.3 x 1.3 (DSBGA | 8)
8SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 8)    
TMP422 Order now Remote     I2C, SMBus, 2-Wire     2.5     12     -40 to 125     2.7     5.5     38     Shutdown     2     4     Catalog     SOT-23 | 8     8SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 8)    
TMP423 Order now Remote     I2C, SMBus, 2-Wire     2.5     12     -40 to 125     2.7     5.5     38     Shutdown     3     2     Catalog     SOT-23 | 8     8SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 8)    
TMP461 Order now Remote     I2C, SMBus, 2-Wire     1     12     -40 to 125     1.7     3.6     375     Programmable Alert
Remote diode fault detection    
1     9     Catalog