参数资料
型号: ADN2814ACPZ
厂商: Analog Devices Inc
文件页数: 14/28页
文件大小: 0K
描述: IC CLOCK/DATA RECOVERY 32LFCSP
标准包装: 1
类型: 时钟和数据恢复(CDR),多路复用器
PLL:
主要目的: SONET/SDH
输入: CML
输出: LVDS
电路数: 1
比率 - 输入:输出: 1:2
差分 - 输入:输出: 是/是
频率 - 最大: 675MHz
电源电压: 3 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 32-VFQFN 裸露焊盘,CSP
供应商设备封装: 32-LFCSP-VQ(5x5)
包装: 托盘
Data Sheet
ADN2814
Rev. C | Page 21 of 28
APPLICATIONS INFORMATION
PCB DESIGN GUIDELINES
Proper RF PCB design techniques must be used for optimal
performance.
Power Supply Connections and Ground Planes
Use of one low impedance ground plane is recommended. The
VEE pins should be soldered directly to the ground plane to
reduce series inductance. If the ground plane is an internal
plane and connections to the ground plane are made through
vias, multiple vias can be used in parallel to reduce the series
inductance, especially on Pin 23, which is the ground return for
the output buffers. The exposed pad should be connected to the
GND plane using plugged vias so that solder does not leak
through the vias during reflow.
Use of a 22 μF electrolytic capacitor between VCC and VEE is
recommended at the location where the 3.3 V supply enters the
PCB. When using 0.1 μF and 1 nF ceramic chip capacitors, they
should be placed between the IC power supply VCC and VEE,
as close as possible to the ADN2814 VCC pins.
If connections to the supply and ground are made through
vias, the use of multiple vias in parallel helps to reduce series
inductance, especially on Pin 24, which supplies power to the
high speed CLKOUTP/CLKOUTN and DATAOUTP/
DATAOUTN output buffers. Refer to Figure 24 for the
recommended connections.
By using adjacent power supply and GND planes, excellent high
frequency decoupling can be realized by using close spacing
between the planes. This capacitance is given by
( )
pF
/
0.88ε
d
A
C
r
PLANE =
where:
ε
r
is the dielectric constant of the PCB material.
A is the area of the overlap of power and GND planes (cm2).
d is the separation between planes (mm).
For FR-4, εr = 4.4 mm and 0.25 mm spacing, C ~15 pF/cm2.
50 TRANSMISSION LINES
DATAOUTP
DATAOUTN
CLKOUTP
CLKOUTN
0.1F
22F
1nF
0.1F
0.47F ±20%
>300M INSULATION RESISTANCE
1nF
0.1F
1nF
+
VCC
50
CIN
TIA
VCC
RTH
VCC
NC
C
I2C CONTROLLER
VCC
1
VCC
2
VCC
3
VREF
4
NIN
5
PIN
6
SLICEP
7
SLICEN
8
VEE
24
VCC
23
VEE
22
LOS
21
SDA
20
SCK
19
SADDR5
18
VCC
17
VEE
9
T
H
R
A
D
J
10
R
E
F
C
L
K
P
11
R
E
F
C
L
K
N
12
V
C
13
V
E
14
C
F
2
15
C
F
1
16
L
O
L
32
V
C
31
V
C
30
V
E
29
D
A
TA
O
U
T
P
28
D
A
TA
O
U
T
N
27
S
Q
U
E
L
C
H
26
C
L
K
O
U
T
P
25
C
L
K
O
U
T
N
EXPOSED PAD
TIED OFF TO
VEE PLANE
WITH VIAS
04
94
9-
0
3
1
Figure 24. Typical ADN2814 Applications Circuit
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