+/-1degC Remote and Local Temperature Sensor in SOT23-8 & WCSP  - TMP421

TMP421 (ACTIVE)

+/-1degC Remote and Local Temperature Sensor in SOT23-8 & 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

 
Interface
Pin/Package
Shutdown
Approx. Price (US$)
Operating Temperature Range (C)
Rating
Remote Channel
Remote Sensor Correction
Programmable Alert
Remote Diode Temp Range for Listed Accuracy (C)
TMP421 TMP422 TMP423
I2C
SMBus    
I2C
SMBus    
I2C
SMBus    
8DSBGA
8SOT-23    
8SOT-23     8SOT-23    
Yes     Yes     Yes    
0.55 | 1ku     0.65 | 1ku     0.75 | 1ku    
-40 to 125     -40 to 125     -40 to 125    
Catalog     Catalog     Catalog    
1     2     3    
n-Factor Correction
Series Resistance Cancellation    
n-Factor Correction
Series Resistance Cancellation    
n-Factor Correction
Series Resistance Cancellation    
No     No     No    
-40 to 150     -40 to 150     -40 to 150    

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