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 / Multi-channel 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
Package Size: mm2:W x L (PKG)
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
SMBus   
I2C
SMBus   
I2C
SMBus   
I2C
SMBus   
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   
See datasheet (DSBGA)    8VSSOP: 15 mm2: 4.9 x 3(VSSOP)
8SOIC: 29 mm2: 6 x 4.9(SOIC)   
8SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)    8SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)    See datasheet (WSON)    10QFN: 4 mm2: 2 x 2(QFN)   
0.55 | 1ku    0.45 | 1ku    0.65 | 1ku    0.75 | 1ku    0.52 | 1ku    0.57 | 1ku   

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