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 diodeconnected

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.