SLASF03 December 2021 DAC11001B
PRODUCTION DATA
The printed-circuit board (PCB) assembly process, including reflow soldering, imparts thermal stresses on the device which can degrade the precision of the device and must be considered in the development of very-high-precision systems. Standard reflow guidelines must be followed to achieve the device specified performance. For more information please see Texas Instruments, MSL Ratings and Reflow Profiles application report.
Baking the PCBs after the assembly process can restore the precision of the device to pre-assembly values. Figure 10-1 to Figure 10-3 show the effect of reflow soldering on the typical distribution of INL of the device.
Figure 10-1 shows the INL distribution for a set of DAC11001B devices before the PCB assembly process. Exposing the devices to a JEDEC-standard thermal profile for reflow soldering produces the histogram shown in Figure 10-2 on another set of devices. The standard INL deviation increased due to the thermal stress imparted to the device from the reflow process. However, baking DAC11001B units for 60 minutes at 125°C after the reflow soldering process produced the distribution given in Figure 10-3. The post-reflow bake restored the INL standard deviation to pre-assembly levels.