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Original question:

DS25BR100: Max Junction Temperature and CML in/out operation

DS25BR100: IT IS HEATING TOO MUCH AND CONSUMING MORE CURRENT

VISHAL KALWANI
Intellectual 705 points
Part Number: DS25BR100

Hii,

I have attached the schematic of ds25br100. Diffrencial input terminal are floating.only through divider Resistor i am applying 1.2v at Differencial Input Terminal.And i am getting Output Voltage in the Range of 1.3-1.36V.

Why i am getting output voltage 1.3-1.36v if i am applying input 1.2v.

why this ic is heating too much?It is showing 55 degree celsicus when measure through Temperature Gun.

I have not used pre-emphasis and equalization circuit it is Not Mounted.

  • 0
    TI__Mastermind 43795 points

    Hi Vishal,

    Based on the schematic the DAP is tied to GND.  This is the proper connection.  Is it possible that the device is being warmed by the PCB itself?

    The normal power consumption of this device should only raise the junction temperature ~ 6 degrees C

    The input voltage common mode and output voltage common mode are not connected.  The output voltage common mode of 1.3V is slightly higher than expected but within the specification.

    Regards,

    Lee

  • 0 in reply to Lee Sledjeski
    TI__Guru* 93670 points
    Hi Vishal,
    It's been three days with no feedback. I am assuming this problem is resolved. We are closing this case. Please re-open this case if there is an update.
    Regards,,nasser