Datasheet > 射频和微波 > 射频/微波分光器/合路器> ADA4303-2ACPZ-R2

ADA4303-2ACPZ-R2

更新时间： 2024-01-13 05:15:43

品牌	Logo	应用领域
亚德诺 - ADI		射频和微波射频分光器射频合路器微波分光器微波合路器
页数	文件大小	规格书
12页	264K
描述
1:2 Single-Ended, Low Cost Active RF Splitter

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ADA4303-2ACPZ-R2 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	Reach Compliance Code：	unknown
风险等级：	5.69	Is Samacsys：	N
特性阻抗：	75 Ω	构造：	COMPONENT
JESD-609代码：	e3	最大工作频率：	1700 MHz
最小工作频率：		最高工作温度：	85 °C
最低工作温度：	-40 °C	射频/微波设备类型：	SPLITTER
端子面层：	MATTE TIN	Base Number Matches：	1

ADA4303-2ACPZ-R2 数据手册

浏览型号ADA4303-2ACPZ-R2的Datasheet PDF文件第10页

ADA4303-2

APPLICATIONS

The ADA4303-2 active splitter is primarily intended for use

in the downstream path of television set-top boxes (STBs) that

contain multiple tuners. It is typically located directly after the

diplexer in a CATV customer premise unit. The ADA4303-2

provides a single-ended input and two single-ended outputs

that allow the delivery of the RF signal to two different signal

paths. These paths can include, but are not limited to, a main

picture tuner, a picture-in-picture (PIP) tuner, an out-of-band

(OOB) tuner, a digital video recorder (DVR), and a cable

modem (CM).

EVALUATION BOARD

The ADA4303-2 evaluation board allows designers to assess the

performance of the part in their particular applications. The board

includes 75 Ω coaxial connectors and 75 Ω controlled-impedance

signal traces that carry the input and output signals. Power (5 V)

is applied to the red VCC loop connector, and ground is connected

to the black GND loop connector.

The board has two 249 Ω resistors between each output and

ground that set the gain of the overall circuit to 3 dB and

improve output-to-output isolation. A schematic of the

ADA4303-2 evaluation board is shown in Figure 17.

The ADA4303-2 exhibits composite second-order (CSO) and

composite triple beat (CTB) products that are −62 dBc and

−72 dBc, respectively. The use of the SiGe process also allows

the ADA4303-2 to achieve a noise figure (NF) of less than 4.5 dB.

RF LAYOUT CONSIDERATIONS

Appropriate impedance matching techniques are mandatory

when designing a circuit board for the ADA4303-2. Improper

characteristic impedances on traces can cause reflections that

can lead to poor linearity. The characteristic impedance of the

signal trace from each output should be 75 Ω.

CIRCUIT DESCRIPTION

The ADA4303-2 consists of a low noise buffer amplifier followed

by a resistive power divider. This arrangement provides 3 dB of

gain relative to the RF signal present at the input of the device.

The input and each output must be properly matched to a 75 Ω

environment for distortion and noise performance to match the

data sheet specifications. In addition, to achieve the specified gain,

a 1% 249 Ω resistor should be installed to ground on each output.

AC coupling capacitors of 0.01 μF are recommended for the

input and outputs.

POWER SUPPLY

The 5 V supply should be applied to each of the VCC pins and

RF choke via a low impedance power bus. The power bus should

be decoupled to ground using a 10 μF tantalum capacitor and

a 0.1 μF ceramic chip capacitor located close to the ADA4303-2.

In addition, the VCC pins should be decoupled to ground with

a 0.1 μF ceramic chip capacitor located as close to each of the

pins as possible.

A 1 μH RF choke (Coilcraft chip inductor 0805LS-102X) is

required to correctly bias internal nodes of the ADA4303-2.

It should be connected between the 5 V supply and IL (Pin 11).

VCC

GND

0.1µF

10µF

1.0μH

0.1µF

0.01μF

249ꢀ

VCC

0.01μF

VO1

VO2

ADA4303-2

VIN

0.01μF

GND

NC = NO CONNECT

Figure 17. ADA4303-2 Evaluation Board Schematic

Rev. 0 | Page 8 of 12

1...5 6 789 10 11 12

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与ADA4303-2ACPZ-R2相关器件

型号	品牌	获取价格	描述	数据表
ADA4303-2ACPZ-R7	ADI	获取价格	1:2 Single-Ended, Low Cost Active RF Splitter
ADA4303-2ACPZ-RL	ADI	获取价格	1:2 Single-Ended, Low Cost Active RF Splitter
ADA4304-2	ADI	获取价格	1:2 Single-Ended, Low Cost, Active RF Splitter
ADA4304-2ACPZ-R2	ADI	获取价格	1:2 Single-Ended, Low Cost, Active RF Splitter
ADA4304-2ACPZ-R7	ADI	获取价格	1:2 Single-Ended, Low Cost, Active RF Splitter
ADA4304-2ACPZ-RL	ADI	获取价格	1:2 Single-Ended, Low Cost, Active RF Splitter
ADA4304-3	ADI	获取价格	1:3 and 1:4 Single-Ended, Low Cost Active RF Splitters
ADA4304-3_15	ADI	获取价格	Single-Ended, Low Cost, Active RF Splitters
ADA4304-3ACPZ-R2	ADI	获取价格	1:3 Single-Ended, Low Cost, Active RF Splitters
ADA4304-3ACPZ-R2	ROCHESTER	获取价格	54 MHz - 865 MHz RF/MICROWAVE SPLITTER, 3 X 3 MM, ROHS COMPLIANT, LFCSP, 16 PIN

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