TMP451 1.7V-Capable Remote and Local Temp Sensor with N-Factor, Filter, and Series-R Correction | TI.com

TMP451 (ACTIVE)

1.7V-Capable Remote and Local Temp Sensor with N-Factor, Filter, 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

View more

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)
TMP451 TMP411 TMP421 TMP422 TMP423 TMP461
Remote     Remote     Remote     Remote     Remote     Remote    
I2C, SMBus, 2-Wire     I2C, SMBus, 2-Wire     I2C, SMBus, 2-Wire     I2C, SMBus, 2-Wire     I2C, SMBus, 2-Wire     I2C, SMBus, 2-Wire    
1     2.5     2.5     2.5     2.5     1    
12     12     12     12     12     12    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
1.7     2.7     2.7     2.7     2.7     1.7    
3.6     5.5     5.5     5.5     5.5     3.6    
40     30     38     38     38     375    
Dynamic Averaging
Programmable Alert
Shutdown    
Programmable Alert
Shutdown    
Shutdown     Shutdown     Shutdown     Programmable Alert
Remote diode fault detection    
1     1     1     2     3     1    
1     4     9     4     2     9    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
WSON | 8     SOIC | 8
VSSOP | 8    
DSBGA | 8
SOT-23 | 8    
SOT-23 | 8     SOT-23 | 8     QFN | 10    
See datasheet (WSON)     8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
See datasheet (DSBGA)
8SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 8)    
8SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 8)     8SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 8)     10QFN: 4 mm2: 2 x 2 (QFN | 10)