Remote and Local Temperature Sensor with N-Factor and Series-R Correction in WCSP - TMP421

TMP421 (ACTIVE)

Remote and Local Temperature Sensor with N-Factor and Series-R Correction in WCSP

Description

The TMP421, TMP422, and TMP423 are remote temperature sensor monitors with a built-in local temperature sensor. The remote temperature sensor diode-connected transistors are typically low-cost, NPN- or PNP-type transistors or diodes that are an integral part of microcontrollers, microprocessors, or FPGAs.

Remote accuracy is ±1°C for multiple IC manufacturers, with no calibration needed. The two-wire serial interface accepts SMBus write byte, read byte, send byte, and receive byte commands to configure the device.

The TMP421, TMP422, and TMP423 include series resistance cancellation, programmable non-ideality factor, wide remote temperature measurement range (up to +150°C), and diode fault detection.

The TMP421, TMP422, and TMP423 are all available in a SOT23-8 package. The TMP421C is also available in a DSBGA (WCSP) package.

Features

  • SOT23-8 and DSBGA (WCSP) PACKAGES
  • ±1°C REMOTE DIODE SENSOR (MAX)
  • ±1.5°C LOCAL TEMPERATURE SENSOR (MAX)
  • SERIES RESISTANCE CANCELLATION
  • n-FACTOR CORRECTION
  • TWO-WIRE/SMBus™ SERIAL INTERFACE
  • MULTIPLE INTERFACE ADDRESSES
  • DIODE FAULT DETECTION
  • RoHS COMPLIANT AND NO Sb/Br

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Parametrics Compare all products in Remote Temperature Sensors

 
Remote Channel
Local Sensor Accuracy (Max) (+/- C)
Remote Sensor Accuracy (Max) (+/- C)
Remote Diode Temp Range for Listed Accuracy (C)
Remote Temp Resolution (Max) (bits)
Remote Sensor Correction
Temp Resolution (Max) (bits)
Operating Temperature Range (C)
Supply Voltage (Min) (V)
Supply Voltage (Max) (V)
Supply Current (Typ) (uA)
Interface
Special Features
Rating
Package Group
Estimated Package Size (WxL) (mm2)
Approx. Price (US$)
TMP421 TMP411 TMP422 TMP423 TMP451 TMP461
1     1     2     3     1     1    
2.5     2.5     2.5     2.5     1     1    
1     1     1     1     1     0.75    
-40 to 150     -40 to 150     -40 to 150     -40 to 150     -55 to 150     -55 to 150    
12     12     12     12     12     12    
Series Resistance Cancellation
n-Factor Correction    
Series Resistance Cancellation
n-Factor Correction    
Series Resistance Cancellation
n-Factor Correction    
Series Resistance Cancellation
n-Factor Correction    
n-Factor Correction     Offset Correction Register
Series Resistance Cancellation
n-Factor Correction    
12     12     12     12     12     12    
-40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125     -40 to 125    
2.7     2.7     2.7     2.7     1.7     1.7    
5.5     5.5     5.5     5.5     3.6     3.6    
400     400     400     400     35     35    
I2C     SMBus     I2C     I2C
SMBus    
I2C     I2C
SMBus    
Shutdown     Programmable Alert
Shutdown    
Shutdown     Shutdown     Dynamic Averaging
Programmable Alert
Shutdown    
Programmable Alert
Remote diode fault detection    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
DSBGA
SOT-23    
SOIC
VSSOP    
SOT-23     SOT-23     WSON     QFN    
8SOT-23: 1.63 x 2.9: 11 mm2     8VSSOP: 3 x 3: 15 mm2
8SOIC: 3.91 x 4.9: 29 mm2    
8SOT-23: 1.63 x 2.9: 11 mm2     8SOT-23: 1.63 x 2.9: 11 mm2     8WSON: 2 x 2: 4 mm2     10QFN: 2 x 2: 4 mm2    
0.55 | 1ku     0.45 | 1ku     0.65 | 1ku     0.75 | 1ku     0.52 | 1ku     0.57 | 1ku    

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