TMP468_17 Datasheet, PDF (1/43 Pages) Texas Instruments – 9-Channel (8-Remote and 1-Local), High-Accuracy Temperature Sensor

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TMP468
SBOS762 – NOVEMBER 2016
TMP468 9-Channel (8-Remote and 1-Local), High-Accuracy Temperature Sensor
1 Features
•1 8-Channel Remote Diode Temperature Sensor
Accuracy: ±0.75°C
• Local Temperature Sensor Accuracy: ±0.35°C
• 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 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 TMP468 device is a multi-zone, high-accuracy,
low-power temperature sensor using a 2-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
also 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 8 remote channels (and the local
channel) can be programmed independently with two
thresholds which trigger 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TMP468
DSBGA (16)
1.60 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Remote
Remote
Typical Application
Remote
Remote
Zone 4
Zone 3
Zone 2
Zone 1
RS1 RS2
CDIFF
RS1 RS2
CDIFF
RS1 RS2
CDIFF
RS1
RS2
CDIFF
CDIFF
RS1 RS2
Remote
CDIFF
RS1 RS2
CDIFF
RS1 RS2
Remote
Remote
CDIFF
RS1 RS2
Remote
1.7V to 3.6V
CBYPASS
D3
RSCL RSDA RT2 RT
V+
A1
B1
D1+
D2+
TMP468
D4
SCL
C1 _D3+
D1 _D4+
C4
SDA
A3 _D-
A2 _D5+
C3
THERM2
B2
D6+
C2
D7+
D2 _D8+
B3
THERM
Local _{ADD B4}
2-Wire Interface
SMBus/I2C
Compatible
Cotnroller
Over-
Temperature
Shutdown
Zone 9
GND
A4
Zone 5
Zone 6
Zone 7
Zone 8
Note: See section Design Requirements for remote diode recommendations (most common discrete transistor
recommendation is MMBT3904). Place remote diode differential filter capacitors close to TMP468 pins. Unused diode
channels must be tied to D–. Remote diode filter capacitor and the sum of the series resistance (R_S1 + R_S2) values
must be less than 1 nF and 1 kΩ, respectively.
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.