参数资料
型号: ADA4320-1ACPZ-RL
厂商: Analog Devices Inc
文件页数: 5/16页
文件大小: 0K
描述: IC LINE DVR CATV 5V 24LFCSP
标准包装: 5,000
应用: CATV
输出类型: 差分
电路数: 1
电流 - 电源: 260mA
电压 - 电源,单路/双路(±): 4.75 V ~ 5.25 V
安装类型: 表面贴装
封装/外壳: 24-VFQFN 裸露焊盘,CSP
供应商设备封装: 24-LFCSP-VQ EP(4x5)
包装: 带卷 (TR)
ADA4320-1
Rev. A | Page 13 of 16
RAMP PIN FEATURE
OUTPUT TRANSFORMER
The RAMP pin (Pin 6) can be optionally used to control the
length of the burst on and off transients. By default, leaving the
RAMP pin unconnected results in a transient that is fully compliant
with DOCSIS 3.0. Adding capacitance to the RAMP pin slows
the dissipation even more.
Matching the 300 Ω differential output impedance to unbalanced
75 Ω requires a 4:1 impedance (2:1 turns) ratio transformer.
The transformer should have minimal insertion loss over the
5 MHz to 85 MHz band and have a maximum dc current rating
of at least 200 mA.
Characterization of the ADA4320-1 was performed using a
Coilcraft PWB-4-BL surface-mount wide-band RF transformer.
Alternate choices for the output transformer are the Toko
458PT-1565 and the Tyco Electronics (M/A-COM) ABACT0018.
GND
VIN–
VIN+
GND
COMP
VOUT+
VOUT–
VOUT+
VOUT–
GN
D
GN
D
VC
C
VC
C
VC
C
RAM
P
T
XEN
GN
D
GN
D
GN
D
CL
K
DAT
E
N
ADA4320-1
S
DAT
A
SL
EEP
0.1F
10F
LPF
QPSK/QAM
BURST
MODULATOR
DAC
DIPLEXER
TO TUNER
OR SPLITTER
0.1F
3-WIRE
(SPI-COMPATIBLE)
CONTROL
POWER-DOWN
CONTROL
TRANSMIT
ENABLE/DISABLE
CONTROL
+
5V
100pF
0.1F
100nH
2:1*
UPSTREAM
DOWNSTREAM
F-CONNECTOR
*COILCRAFT PWB-4-BL
ALTERNATES: TOKO 458PT-1565
TYCO MABACT0018
0
87
07
-02
5
1
8
13
20
Figure 24. Typical Application
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