參數(shù)資料
型號(hào)： LTM9005CV-AA#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PBGA204
封裝： 22 X 15 MM, 4.32 MM HEIGHT, LEAD FREE, MO-222, LGA-204
文件頁(yè)數(shù)： 14/24頁(yè)
文件大小： 468K
代理商： LTM9005CV-AA#PBF
LTM9005
21
9005p
applicaTions inForMaTion
Recommended Layout
The high integration of the LTM9005 makes the PCB board
layoutverysimpleandeasy.However,tooptimizeitselectri-
cal and thermal performance, some layout considerations
are still necessary.
UselargePCBcopperareasforground.Thishelpsto
dissipate heat in the package through the board and
also helps to shield sensitive on-board analog signals.
Common ground (GND) and output ground (OGND)
are electrically isolated on the LTM9005, but can be
connected on the PCB underneath the part to provide
a common return path.
Usemultiplegroundvias.Usingasmanyviasaspossible
helps to improve the thermal performance of the board
and creates necessary barriers sepa-rating analog and
digital traces on the board at high frequencies.
Separateanaloganddigitaltracesasmuchaspos-
sible, using vias to create high-frequency barriers.
This will reduce digital feedback that can reduce the
signal-to-noise ratio (SNR) and dynamic range of the
LTM9005.
ConnectpadA8toB8onthetoplayerwithnoother
connections. These pads should not be connected to
any other circuitry or ground. Keep these two pads free
from noise. Connect A9 to B9, L8 to M8 and L9 to M9
in the same manner.
Figure # through ## give a good example of the recom-
mended layout.
The quality of the paste print is an important factor in
producing high yield assemblies. It is recommended to
use a type 3 or 4 printing no-clean solder paste. The solder
stencil design should follow the guidelines outlined in Ap-
plication Note 100. Avoid ultrasonic cleaning.
The LTM9005 employs gold-finished pads for use with
Pb-based or tin-based solder paste. It is inherently Pb-free
and complies with the JEDEC (e4) standard. The materi-
als declaration is available online at http://www.linear.
com/leadfree/mat_dec.jsp.
相關(guān)PDF資料
PDF描述
LTM9005CV-AB#PBF SPECIALTY ANALOG CIRCUIT, PBGA204
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