tda8768a NXP Semiconductors, tda8768a Datasheet - Page 29

• Manufacturer Part Number: tda8768a
• Description: 12-bit, 70 Msps Analog-to-digital Converter Adc
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 09656
Product data
15.4 Manual soldering
15.5 Package related soldering information
During placement and before soldering, the package must be fixed with a droplet of
adhesive. The adhesive can be applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the adhesive is cured.
Typical dwell time is 4 seconds at 250 C. A mildly-activated flux will eliminate the
need for removal of corrosive residues in most applications.
Fix the component by first soldering two diagonally-opposite end leads. Use a low
voltage (24 V or less) soldering iron applied to the flat part of the lead. Contact time
must be limited to 10 seconds at up to 300 C.
When using a dedicated tool, all other leads can be soldered in one operation within
2 to 5 seconds between 270 and 320 C.
Table 10:
[1]
[2]
[3]
[4]
[5]
[6]
Package
BGA, LBGA, LFBGA, SQFP, TFBGA, VFBGA
HBCC, HBGA, HLQFP, HSQFP, HSOP,
HTQFP, HTSSOP, HVQFN, HVSON, SMS
PLCC
LQFP, QFP, TQFP
SSOP, TSSOP, VSO
•
The footprint must incorporate solder thieves at the downstream end.
For packages with leads on four sides, the footprint must be placed at a 45 angle
to the transport direction of the printed-circuit board. The footprint must
incorporate solder thieves downstream and at the side corners.
For more detailed information on the BGA packages refer to the (LF)BGA Application Note
(AN01026); order a copy from your Philips Semiconductors sales office.
All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the
maximum temperature (with respect to time) and body size of the package, there is a risk that internal
or external package cracks may occur due to vaporization of the moisture in them (the so called
popcorn effect). For details, refer to the Drypack information in the Data Handbook IC26; Integrated
Circuit Packages; Section: Packing Methods .
These packages are not suitable for wave soldering. On versions with the heatsink on the bottom
side, the solder cannot penetrate between the printed-circuit board and the heatsink. On versions with
the heatsink on the top side, the solder might be deposited on the heatsink surface.
If wave soldering is considered, then the package must be placed at a 45 angle to the solder wave
direction. The package footprint must incorporate solder thieves downstream and at the side corners.
Wave soldering is suitable for LQFP, QFP and TQFP packages with a pitch (e) larger than 0.8 mm; it
is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm.
Wave soldering is suitable for SSOP and TSSOP packages with a pitch (e) equal to or larger than
0.65 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm.
[4]
, SO, SOJ
[1]
Suitability of surface mount IC packages for wave and reflow soldering
methods
Rev. 02 — 03 July 2002
12-bit, 70 Msps Analog-to-Digital Converter (ADC)
Soldering method
Wave
not suitable
not suitable
suitable
not recommended
not recommended
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
[3]
[4][5]
[6]
TDA8768A
Reflow
suitable
suitable
suitable
suitable
suitable
[2]
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