1FEATURES

2• Accurately Senses Remote Diode-Connected

MMBT3904 Transistors or Thermal Diodes On-

Board Processors, FPGAs or ASICs

• Accurately Senses Its Own Local Die

Temperature

• Offset Register can Adjust for a Variety of

Thermal Diodes

• Resolves Remote Temperatures up to

255.875°C

• 10-bit Plus Sign and 11-bit Unsigned Data

Formats, with 1/8°C Resolution

• Digital Filter of Remote Data Lowers Noise and

Improves Resolution to 1/32°C

• Integrated PWM Fan Speed Control Output

Supports High Resolution at 22.5kHz

Frequency for 4-Pin Fans

• Acoustic Fan Noise Reduction with User-

Programmable 12-Step Lookup Table

• LUT Transition Fine Resolution Smoothing

Function

• Tachometer Input for Measuring Fan RPM with

Smart-Tach Modes for Measuring RPM of Fans

when Pulse-Width-Modulating an Actual Power

• ALERT Output for Error Event Notification

• TCRIT Output for Critical Temperature System

Shutdown

• SMBus 2.0 Compatible Interface, Supports

TIMEOUT

• WSON Packages

APPLICATIONS

• Communications Infrastructure FPGA, ASIC or

Processor Thermal Management

• Electronic Test and Office Equipment

• Industrial Controls

DESCRIPTION

The LM96063 is remote diode temperature sensors

with integrated fan control that includes remote diode

sensing. The LM96063 accurately measures: (1) its

own temperature and (2) the temperature of a diode-

connected transistor, such as a 2N3904, or a thermal

diode commonly found on Computer Processors,

Graphics Processor Units (GPU) and other ASIC's.

The LM96063 also features an integrated, pulse-

width-modulated (PWM), open-drain fan control

output. Fan speed is a combination of the remote

temperature reading, the lookup table and register

settings. The 12-step Lookup Table (LUT) enables

the user to program a non-linear fan speed vs.

temperature transfer function often used to quiet

acoustic fan noise. In addition a fully programmable

ramping function has been added to allow smooth

transitions between LUT setpoints.

The LM96063 is targeted mainly for a transistor

MMBT3904 used as thermal diodes or thermal diodes

found in many FPGAs, ASICs, and processors on

SOI processes. The LM96163 is identical to the

LM96063 except the TruTherm BJT Beta compensation is enabled at power up that is targeted

for thermal diodes found on popular processors using

bulk non SOI processes.