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參數(shù)資料
| 型號： | ADA4960-1ACPZ-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 10/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC DRIVER DIFF 16LFCSP |
| 標(biāo)準(zhǔn)包裝： | 5,000 |
| 類型： | ADC 驅(qū)動器 |
| 應(yīng)用： | 數(shù)據(jù)采集 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-WFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 16-LFCSP-WQ（3x3） |
| 包裝： | 帶卷 (TR) |
ADA4960-1
Rev. 0 | Page 18 of 20
LAYOUT, GROUNDING, AND BYPASSING
The ADA4960-1 is a high speed device. Realizing its superior
performance requires attention to the details of high speed
printed circuit board (PCB) design.
The first requirement is to use a multilayer PCB with solid ground
and power planes that cover as much of the board area as possible.
Bypass each power supply pin directly to a nearby ground plane, as
close to the device as possible. Use 0.1 μF high frequency ceramic
chip capacitors.
Provide low frequency bulk bypassing, using 10 μF tantalum
capacitors from each supply to ground.
Stray transmission line capacitance in combination with package
parasitics can potentially form a resonant circuit at high frequencies,
resulting in excessive gain peaking or possible oscillation.
Signal routing should be short and direct to avoid such parasitic
effects. Provide symmetrical layout for complementary signals
to maximize balanced performance.
Use radio frequency transmission lines to connect the driver
and receiver to the amplifier.
Minimize stray capacitance at the input/output pins by clearing
the underlying ground and low impedance planes near these pins.
If the driver/receiver is more than one-eighth of the wavelength
from the amplifier, the signal trace widths should be minimal.
This nontransmission line configuration requires the underlying
and adjacent ground and low impedance planes to be cleared
near the signal lines.
The exposed thermal paddle is internally connected to the ground
pin of the amplifier. Solder the paddle to the low impedance
ground plane on the PCB to ensure the specified electrical
performance and to provide thermal relief. To reduce thermal
impedance further, it is recommended that the ground planes
on all layers under the paddle be connected together with vias.
08
45
8-
03
6
0.3mm DIAMETER VIAS
1.2mm
1.5mm
1.
2m
m
1.
5m
m
Figure 44. Recommended PCB Thermal Attach Pad
TOP METAL
GROUND PLANE
POWER PLANE
BOTTOM METAL
1.5mm
1.2mm
08
45
8-
03
7
Figure 45. Cross-Section of a 4-Layer PCB Showing Thermal Via Connection to Buried Ground Plane
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