Preliminary User's Manual l TQMa8Xx UM 0002 l © 2018, TQ-Systems GmbH
Page 23
6.4
Climate and operational conditions
The operating temperature range for the TQMa8Xx strongly depends on the installation situation (heat dissipation by heat
conduction and convection); hence, no fixed value can be given for the whole assembly.
In general, a reliable operation is given when following conditions are met:
Table 19:
Climate and operational conditions extended temperature range –25 °C to +85 °C
Parameter
Range
Remark
Environmental temperature
–25 °C to +60 °C
–
Tj i.MX 8X
TBD
–
Tj PMIC
TBD
–
Case temperature DDR3L SDRAM
–40 °C to +95 °C
–
Case temperature other ICs
TBD
–
Storage temperature TQMa8Xx
TBD
–
Relative humidity (operating / storage)
10 % to 90 %
Not condensing
Table 20:
Climate and operational conditions industrial temperature range –40 °C to +85 °C
Parameter
Range
Remark
Environmental temperature
–25 °C to +60 °C
–
Tj i.MX 8X
TBD
–
Tj PMIC
TBD
–
Case temperature DDR3L SDRAM
–40 °C to +95 °C
–
Case temperature other ICs
TBD
–
Storage temperature TQMa8Xx
TBD
–
Relative humidity (operating / storage)
10 % to 90 %
Not condensing
Detailed information concerning the thermal characteristics of the i.MX 8X is to be taken from the NXP documents (1), and (2).
Attention: Destruction or malfunction
The TQMa8Xx belongs to a performance category in which a cooling system is essential in most
applications. It is the user’s sole responsibility to define a suitable heat sink (weight and mounting
position) depending on the specific mode of operation (e.g., dependence on clock frequency, stack
height, airflow, and software). Particularly the tolerance chain (PCB thickness, board warpage, BGA
balls, BGA package, thermal pad, heatsink) as well as the maximum pressure on the i.MX 8X must be
taken into consideration when connecting the heat sink.
The i.MX 8X is not necessarily the highest component. Inadequate cooling connections can lead to
overheating of the TQMa8Xx and thus malfunction, deterioration or destruction.
6.5
Reliability and service life
The MTBF of the TQMa8Xx is estimated to be 1,000,000 hours @ +40 °C environmental temperature, ground benign.
The TQMa8Xx is designed to be insensitive to shock and vibration.
High quality industrial grade connectors are assembled on the TQMa8Xx.
