Analog Devices ADA4302 4 Sp0 Datasheet

FEATURES

Single 5 V supply 54 MHz to 865 MHz CATV operating range

4.6 dB of gain per output channel

4.4 dB noise figure 25 dB isolation between output channels

−16 dB input return loss CSO of −89 dBc (135 channels, 15 dBmV per tone) CTB of −81 dBc (135 channels, 15 dBmV per tone)

1.3 GHz, −3 dB bandwidth

APPLICATIONS

Cable set-top boxes Home gateways CATV distribution systems Cable splitter modules

GENERAL DESCRIPTION

The ADA4302-4 is used as an active element in applications where a lossless signal split is required. Typical applications include multituner cable set-top boxes, cable splitter modules, multituner televisions, and home gateways where traditional solutions have consisted of discrete passive splitters followed by separate fixed gain amplifiers. The ADA4302-4 is a low cost alternative solution that simplifies designs and improves system performance by integrating a signal splitter element and gain element into a single IC solution.

The ADA4302-4 features four differential outputs. The differential architecture allows systems designed with the ADA4302-4 to maintain excellent linearity throughout the CATV band. The ADA4302-4 can also be configured for applications that require fewer than four outputs. Outputs may be configured independently from one another.

For more information about the ADA4302-4, contact Analog Devices, Inc. via email at

high_current_drivers.com@analog.com.

Active RF Splitter

ADA4302-4

FUNCTIONAL BLOCK DIAGRAM

VCC

GND

VCC

ILN VIP

GND

VCC

–60

–70

–80

CSO (dBc)

–90

TA = +25°C

–100

–110

50 100 1000

Figure 2. Composite Second-Order vs. Frequency

SPLITTER VIN ILP

GND

Figure 1.

TA = +85°C

TA = –40°C

FREQUENCY (MHz)

VON4

VOP4

VON3

VOP3

VON2

VOP2

VON1

VOP1

05017-016

05017-008

Rev. Sp0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.

www.analog.com

ADA4302-4

D05017F–0–10/04(Sp0)

Rev. Sp0 | Page 2 of 2