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INA148-Q1: Storage Rating vs. Industrial version

Antenna_Head
Genius 11395 points
Part Number: INA148-Q1
Other Parts Discussed in Thread: INA148,

Question from customer regarding the differences between INA148 and INA148-Q1:

what procedure is used to designate storage temperatures since they appear to be different:

 

INA148QDRQ1 = -65°C to 150°C

INA148UA/2K5 = -55°C to 125°C

 

What exactly is affected by long term exposure? Electrical specifications or packaging deformation/damage?

Is this a typo on the -Q1 data sheet or does it really have the lower storage temp?  If so, why?  seems like a odd value.

Thanks!

-Steve

  • 0
    TI__Guru 60570 points

    Steve,

    What you see in INA148 vs INA148-Q1 datasheets in terms of storage temperature is for real. Temperature cycle condition has been used for specifying storage temperature in product datasheets.  The adverse effects from long term exposure can be solderability. If the parts exceed the floor life temp/humidity conditions per IPC/JEDEC J-STD-020E, they may have delamination post solder reflow which can lead to lifted or fractured wire bonds.

    Parts that are shipped as level 3-6 require bake if the MBB (moisture barrier bag) is opened and the parts exceed the floor time prior to assembly.  Level 1 is considered not moisture sensitive as long as the floor life condition (≤30 °C/85% RH) per JEDEC is not exceeded and the time from when the bag is opened to assembly is unlimited. Level 2 – 6 floor life condition is (≤30 °C/60% RH).