TMP464 Datasheet, PDF (1/43 Pages) Texas Instruments – High-Accuracy 5-Channel (4-Remote and 1-Local) Temperature Sensor

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TMP464
SBOS835 – MAY 2017
TMP464 High-Accuracy 5-Channel (4-Remote and 1-Local) Temperature Sensor
1 Features
•1 4-Channel Remote Diode Temperature Sensor
• Local and Remote Accuracy: ±0.75°C (Maximum)
• Temperature Resolution: 0.0625°C
• Supply and Logic Voltage Range: 1.7 V to 3.6 V
• 43-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-pin VQFN Package
2 Applications
• MCU, GPU, ASIC, FPGA, DSP, and CPU
Temperature Monitoring
• Telecommunication Equipment
• Servers and Personal Computers
• Cloud Ethernet Switches
• Secure Data Centers
• Highly Integrated Medical Systems
• Precision Instruments and Test Equipment
• LED Lighting Thermal Control
3 Description
The TMP464 device is a high-accuracy, low-power
temperature sensor using a two-wire, SMBus or I²C
compatible interface. Up to four remote diode-
connected temperature zones can be monitored
simultaneously in addition to the local temperature.
Aggregating the temperature measurements across a
system allows 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 four 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 around the threshold.
The TMP464 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 ) for easy integration into computing systems.
The remote junction supports a temperature range
from –55°C to +150°C. The TMP464 has a
preprogrammed temperature limit of 125°C.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TMP464
VQFN (16)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Schematic
Remote
Remote
Remote
Remote
Zone 4
Zone 3
Zone 2
Zone 1
RS1 RS2
CDIFF
RS1 RS2
CDIFF
RS1 RS2
CDIFF
RS1 RS2
CDIFF
1.7 V to 3.6 V
CBYPASS
14
RSCL RSDA RT2 RT
V+
6
5
D1+ _{TMP464 SCL} 13
D2+
4 _D3+
3 _D4+
SDA ¹²
7 _D-
11
THERM2
10
THERM
2-Wire Interface
SMBus / I²C
Compatible
Controller
Overtemperature
Shutdown
Local
ADD ⁹
Zone 5
GND
8
Copyright © 2017, Texas Instruments Incorporated
See the Design Requirements section for remote diode recommendations.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.