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参数资料
| 型号： | TDA8786AG/C2 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP48 |
| 封装： | PLASTIC, LQFP-48 |
| 文件页数： | 16/31页 |
| 文件大小： | 186K |
| 代理商： | TDA8786AG/C2 |
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1997 Nov 17
23
Philips Semiconductors
Product specication
10-bit analog-to-digital interface for
CCD cameras
TDA8786; TDA8786A
SOLDERING
Introduction
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our
“IC Package Databook” (order code 9398 652 90011).
Reow soldering
Reflow soldering techniques are suitable for all LQFP
packages.
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement.
Several methods exist for reflowing; for example,
infrared/convection heating in a conveyor type oven.
Throughput times (preheating, soldering and cooling) vary
between 50 and 300 seconds depending on heating
method. Typical reflow peak temperatures range from
215 to 250
°C.
Wave soldering
Wave soldering is not recommended for LQFP packages.
This is because of the likelihood of solder bridging due to
closely-spaced leads and the possibility of incomplete
solder penetration in multi-lead devices.
CAUTION
Wave soldering is NOT applicable for all LQFP
packages with a pitch (e) equal or less than 0.5 mm.
If wave soldering cannot be avoided, for LQFP
packages with a pitch (e) larger than 0.5 mm, the
following conditions must be observed:
A double-wave (a turbulent wave with high upward
pressure followed by a smooth laminar wave)
soldering technique should be used.
The footprint must be at an angle of 45° to the board
direction and must incorporate solder thieves
downstream and at the side corners.
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.
Maximum permissible solder temperature is 260
°C, and
maximum duration of package immersion in solder is
10 seconds, if cooled to less than 150
°C within
6 seconds. 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.
Repairing soldered joints
Fix the component by first soldering two diagonally-
opposite end leads. Use only a low voltage soldering iron
(less than 24 V) 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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA8786G | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:10-bit analog-to-digital interface for CCD cameras |
| TDA8787 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:10-bit, 3.0 V analog-to-digital interface for CCD cameras |
| TDA8787A | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:10-bit, 3.0 V, up to 25 Msps analog-to-digital interface for CCD cameras |
| TDA8787AHL | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:10-bit, 3.0 V, up to 25 Msps analog-to-digital interface for CCD cameras |
| TDA8787AHL/C3,118 | 功能描述:电信线路管理 IC 10-BIT CCD 25MSPS RoHS:否 制造商:STMicroelectronics 产品:PHY 接口类型:UART 电源电压-最大:18 V 电源电压-最小:8 V 电源电流:30 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VFQFPN-48 封装:Tray |
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