1 Features

1• Accurately Senses Die Temperature of 4 Remote

ICs or Diode Junctions and Local Temperature

• Local Temperature Accuracy ±2.0°C (Maximum)

• Remote Diode Temperature Accuracy ±1.1°C

(Maximum)

• Supply Voltage: 3 V to 3.6 V

• Average Supply Current (1-Hz Conversion Rate)

0.57 mA (Typical)

• Programmable Digital Filters and Analog Front-

End Filter

• 0.125°C LSB Temperature Resolution

• 0.03125°C LSB Remote Temperature Resolution

With Digital Filter Enabled

• Signed Format: +127.875°C/–128°C Remote

Range

• Unsigned Format: 0°C/255°C Remote Range

• Remote Diode Fault Detection, Model Selection,

and Offset Correction

• Mask and Status Register Support

• 3 Programmable TCRIT Outputs With

Programmable Shared Hysteresis and Fault-

Queue

• Programmable Conversion Rate and Shutdown

Mode One-Shot Conversion Control

• SMBus 2.0 Compatible Interface, Supports

TIMEOUT

• Three-Level Address Pin

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

• Office Electronics

• Electronic Test Equipment

• Processor and Computer System Thermal

Management

3 Description

The LM95214 device is an 11-bit digital temperature

sensor with a 2-wire System Management Bus

(SMBus) interface that can very accurately monitor

the temperature of four remote diodes as well as its

own temperature. The four remote diodes can be

external devices such as microprocessors, graphics

processors that target the ideality of a 2N3904

transistor or diode-connected 2N3904s.

The LM95214 reports temperature in two different

formats for +127.875°C/–128°C range and 0°C/255°C

range. The LM95214 TCRIT1, TCRIT2 and TCRIT3

outputs are triggered when any unmasked channel

exceeds its corresponding programmable limit and

can be used to shutdown the system, to turn on the

system fans or as a microcontroller interrupt function.

The current status of the TCRIT1, TCRIT2, and

TCRIT3 pins can be read back from the status

registers. Mask registers are available for further

control of the TCRIT outputs.

Two LM95214 remote temperature channels have

programmable digital filters while the other two

remote channels use a fault-queue to minimize

unwanted TCRIT events when temperature spikes

are encountered.

For optimum flexibility and accuracy, each LM95214

channel includes registers for offset correction. A

three-level address pin allows connection of up to 3

LM95214s to the same SMBus master. The LM95214

includes power saving functions such as:

programmable conversion rate, shutdown mode, and

disabling of unused channels.