±0.75⁰C High-Accuracy Multi-channel Remote and Local Temperature Sensor - TMP468

TMP468 (ACTIVE)

±0.75⁰C High-Accuracy Multi-channel Remote and Local Temperature Sensor

 

Description

The TMP468 device is a multi-zone, high-accuracy, low-power temperature sensor using a two-wire, SMBus or I2C compatible interface. Up to eight remote diode-connected temperature zones can be monitored simultaneously in addition to the local temperature. Aggregating the temperature measurements across a system allow improved performance through tighter guard bands and can reduce board complexity. A typical use case is for monitoring the temperature across different processors, such as MCUs, GPUs, and FPGAs in complex systems such as servers and telecommunications equipment.

Advanced features such as series resistance cancellation, programmable non-ideality factor, programmable offset, and programmable temperature limits are included to provide a robust thermal monitoring solution with improved accuracy and noise immunity.

Each of the eight remote channels (and the local channel) can be programmed independently with two thresholds that are triggered when the corresponding temperature is exceeded at the measured location. In addition, there is a programmable hysteresis setting to avoid constant toggling of the threshold.

The TMP468 device provides high accuracy (0.75°C) and high resolution (0.0625°C) measurement capabilities. The device supports low voltage rails (1.7 V to 3.6 V), common two-wire interfaces, and is available in a small, space efficient package (3 mm × 3 mm or 1.6 mm × 1.6 mm) for easy integration into computing systems. The remote junction supports a temperature range from –55°C to +150°C.

Features

  • 8-Channel Remote Diode Temperature Sensor Accuracy: ±0.75°C (Maximum)
  • Local Temperature Sensor Accuracy: ±0.35°C (Maximum) 2
  • Temperature Resolution: 0.0625°C
  • Supply and Logic Voltage Range: 1.7 V to 3.6 V
  • 67-µA Operating Current (1 SPS, All Channels Active)
  • 0.3-µA Shutdown Current
  • Remote Diode: Series Resistance Cancellation,
    η-Factor Correction, Offset Correction, and Diode Fault Detection
  • Register Lock Function Secures Key Registers
  • I2C or SMBus™ Compatible Two-Wire Interface With Pin-Programmable Address
  • 16-Bump DSBGA and 16-Pin VQFN Packages ™

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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)
TMP468 LM95234 TMP423 TMP464
8    4    3    4   
0.35    2    2.5    1   
0.75    0.875    1    0.75   
-55 to 150    60 to 100    -40 to 150    -50 to 150   
13    13    12    13   
Offset Correction Register
Series Resistance Cancellation
n-Factor Correction   
Beta Compensation
TruTherm   
Series Resistance Cancellation
n-Factor Correction   
Offset Correction Register
Series Resistance Cancellation
n-Factor Correction   
13    11    12    13   
-40 to 125    -40 to 140    -40 to 125    -40 to 125   
1.7    2.7    2.7    1.7   
3.6    5.5    5.5    3.6   
67    570    400    67   
I2C
SMBus   
I2C
SMBus   
I2C
SMBus   
I2C
SMBus   
One shot conversion control
Programmable Alert
Programmable conversion rate
Remote diode fault detection   
One shot conversion control
Programmable Alert
Programmable conversion rate
Remote diode fault detection
Shutdown
Thermal diode input stage filtering   
Shutdown    One shot conversion control
Programmable Alert
Programmable conversion rate
Remote diode fault detection   
Catalog    Catalog    Catalog    Catalog   
DSBGA
QFN   
WSON    SOT-23    QFN   
See datasheet (DSBGA)    See datasheet (WSON)    8SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)    16QFN: 9 mm2: 3 x 3(QFN)