ADA4304-4ACPZ-R2 Datasheet ADA4304-4ACPZ-R7, ADA4304-3ACPZ-R7, ADA4304-4ACPZ-EB | P1-P3

1:3 and 1:4 Single-Ended, Low Cost,

Active RF Splitters

Data Sheet

ADA4304-3/ADA4304-4

Rev. A Document Feedback

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FEATURES

Ideal for CATV and terrestrial applications

2.4 GHz, −3 dB bandwidth

1 dB flatness: 54 MHz to 865 MHz

Low noise figure: 4.6 dB

Low distortion

Composite second-order (CSO): −62 dBc

Composite triple beat (CTB): −72 dBc

Nominal 3 dB gain per output channel

25 dB output-to-output isolation, 50 MHz to 1000 MHz

75 Ω input and outputs

Small package size: 16-lead, 3 mm × 3 mm LFCSP

APPLICATIONS

Set-top boxes

Residential gateways

CATV distribution systems

Splitter modules

Digital cable ready (DCR) TVs

FUNCTIONAL BLOCK DIAGRAMS

VIN

VOUT3

VOUT1

GND

VCC

0.01µF

1µH

ADA4304-3

VOUT2

0.01µF

0.1µF0.1µF

07082-001

Figure 1.

VIN

VOUT3

VOUT1

GND

VCC

0.01µF

1µH

VOUT4

0.01µF

VOUT2

0.01µF

0.1µF0.1µF

07082-002

ADA4304-4

Figure 2.

GENERAL DESCRIPTION

The ADA4304-3/ADA4304-4 are 75 Ω active splitters for use in

applications where a lossless signal split is required. Typical

applications include multituner digital set-top boxes, cable

splitter modules, multituners/digital cable ready (DCR)

televisions, and home gateways where traditional solutions

require discrete passive splitter modules with separate fixed

gain amplifiers.

The ADA4304-3/ADA4304-4 are fabricated using the

Analog Devices, Inc., proprietary silicon germanium (SiGe),

complementary bipolar process, enabling them to achieve very

low levels of distortion with a noise figure of 4.6 dB. The parts

provide low cost alternatives that simplify designs and improve

system performance by integrating a signal splitter element and

a gain block into a single IC. The ADA4304-3/ADA4304-4 are

available in a 16-lead LFCSP and operate in the extended

industrial temperature range of −40°C to +85°C.

ADA4304-3/ADA4304-4 Data Sheet

Rev. A | Page 2 of 11

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

Functional Block Diagrams ............................................................. 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Specifications ..................................................................................... 3 

Absolute Maximum Ratings ............................................................ 4

Thermal Resistance ...................................................................... 4

ESD Caution .................................................................................. 4

Pin Configurations and Function Descriptions ............................5

Typical Performance Characteristics ..............................................6

Test Circuits ........................................................................................9

Applications ..................................................................................... 10

Circuit Description .................................................................... 10

Outline Dimensions ....................................................................... 11

Ordering Guide .......................................................................... 11

REVISION HISTORY

7/2016—Rev. 0 to Rev. A

Changes to Figure 4, Figure 5, Table 4, and Table 5 ..................... 5

Deleted Evaluation Boards Section, RF Layout Considerations

Section, Power Supply Section, and Figure 21; Renumbered

Sequentially ..................................................................................... 10

Deleted Figure 22 and Figure 23 ................................................... 11

Updated Outline Dimensions ....................................................... 12

Changes to Ordering Guide .......................................................... 12

11/2007—Revision 0: Initial Version

Data Sheet ADA4304-3/ADA4304-4

Rev. A | Page 3 of 11

SPECIFICATIONS

= 5 V, 75 Ω system, T

= 25°C, unless otherwise noted.

Table 1.

ADA4304-3 ADA4304-4

Parameter Conditions Min Typ Max Min Typ Max Unit

DYNAMIC PERFORMANCE See Figure 19 for test circuit

Bandwidth (−3 dB) 2400 2400 MHz

Frequency Range 54 865 54 865 MHz

Gain f = 100 MHz 3.3 2.9 dB

Gain Flatness 54 MHz to 865 MHz 1.0 1.0 dB

NOISE/DISTORTION PERFORMANCE

Noise Figure

@ 54 MHz 4.0 4.0 dB

@ 550 MHz 4.6 4.6 dB

@ 865 MHz 4.8 4.8 dB

Output IP3 f

= 97.25 MHz, f

= 103.25 MHz 26 26 dBm

Output IP2 f

= 97.25 MHz, f

= 103.25 MHz 43 43 dBm

Composite Triple Beat (CTB) 135 channels, 15 dBmV/channel, f = 865 MHz −72 −72 dBc

Composite Second Order (CSO) 135 channels, 15 dBmV/channel, f = 865 MHz −62 −62 dBc

Cross Modulation (CXM)

135 channels, 15 dBmV/channel,

100% modulation @ 15.75 kHz, f = 865 MHz

−68 −68 dBc

INPUT CHARACTERISTICS See Figure 19 for test circuit

Input Return Loss @ 54 MHz −17 −13 −18 −14 dB

@ 550 MHz −22 −16 −21 −15 dB

@ 865 MHz −12 −8 −12 −8 dB

Output-to-Input Isolation Any output, 54 MHz to 865 MHz

@ 54 MHz −33 −30 −33 −31 dB

@ 550 MHz −33 −30 −33 −31 dB

@ 865 MHz −34 −31 −35 −32 dB

OUTPUT CHARACTERISTICS See Figure 19 and Figure 20 for test circuits

Output Return Loss Any output, 54 MHz to 865 MHz

@ 54 MHz −21 −17 −21 −17 dB

@ 550 MHz −16 −11 −17 −12 dB

@ 865 MHz −14 −9 −14 −9 dB

Output-to-Output Isolation Any output, 54 MHz to 865 MHz dB

@ 54 MHz −26 −26 dB

@ 550 MHz −25 −25 dB

@ 865 MHz −25 −25 dB

1 dB Compression (P1dB) Output referred, f = 100 MHz 9.0 8.7 dBm

POWER SUPPLY

Nominal Supply Voltage 4.75 5.0 5.25 4.75 5.0 5.25 V

Quiescent Supply Current 92 105 92 105 mA

Characterized with 50 Ω noise figure analyzer.

P1-P3 P4-P6 P7-P9 P10-P11

ADA4304-4ACPZ-R2

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ADA4304-4ACPZ-R2

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