AD8147 판매점 - (AD8146 - AD8148) Triple Differential Driver

AD8147 반도체 회로 부품 판매점

(AD8146 - AD8148) Triple Differential Driver

Analog Devices

Data Sheet

FEATURES

Triple high speed fully differential driver

700 MHz, −3 dB, 2 V p-p bandwidth (AD8146/AD8148)

600 MHz, −3 dB, 2 V p-p bandwidth (AD8147)

200 MHz, 0.1 dB, 2 V p-p bandwidth

3000 V/μs slew rate

Fixed gain (AD8146/AD8147: G = 2, AD8148: G = 4)

Differential or single-ended input to differential output

Can be used as differential-to-differential receiver

Drives one or two 100 Ω UTP cables

Adjustable output common-mode voltage (AD8146)

Internal common-mode feedback network

Output balance error −50 dB @ 50 MHz

On-chip, sync-on common-mode encoding (AD8147/AD8148)

Output pull-down feature for line isolation

Low power: 57 mA @ 5 V for 3 drivers (AD8146)

Wide supply voltage range: +5 V to ±5 V

Available in a small 4 mm × 4 mm LFCSP

APPLICATIONS

QXGA or 1080p video transmission

KVM networking

Video over unshielded twisted pair (UTP)

Differential signal multiplexing

Triple Differential Driver

for Wideband Video

AD8146/AD8147/AD8148

FUNCTIONAL BLOCK DIAGRAMS

OPD 1

VS– 2

–IN A 3

+IN A 4

VS– 5

–OUT A 6

24 23 22 21 20 19

AD8146 18 VOCMC

17 VS+

16 –IN C

15 +IN C

C 14 VS–

13 –OUT C

9 10 11 12

Figure 1.

OPD 1

VS– 2

–IN R 3

+IN R 4

VS– 5

–OUT R 6

24 23 22 21 20 19

AD8147/

AD8148

×2

7 8 9 10 11 12

18 SYNC LEVEL

17 VS+ (SYNC)

16 –IN B

15 +IN B

14 VS–

13 –OUT B

GENERAL DESCRIPTION

The AD8146/AD8147/AD8148 are high speed triple, differential or

single-ended input to differential output drivers. The AD8146

and AD8147 have a fixed gain of 2, and the AD8148 has a fixed

gain of 4. They are all specifically designed for the highest

resolution component video signals but can be used for any

type of analog signals or high speed data transmission over

either Category 5 UTP cable or differential printed circuit

board (PCB) transmission lines.

These drivers can be used with the AD8145 triple differential-

to-singled-ended receiver, and the AD8117 crosspoint switch to

produce a video distribution system capable of supporting

UXGA or 1080p signals.

Manufactured on the Analog Devices, Inc. second generation

XFCB bipolar process, the drivers have large signal bandwidths

Rev. B

Document Feedback

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.

Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.

Figure 2.

of 700 MHz and fast slew rates. They have an internal common-

mode feedback feature that provides output amplitude and

phase matching that is balanced to −60 dB at 50 MHz, suppressing

even-order harmonics and minimizing radiated

electromagnetic interference (EMI).

The common-mode voltage of each AD8146 output can be set

to any level, allowing transmission of signals over the common-

mode voltages. The AD8147 and AD8148 encode the vertical

and horizontal sync signals on the common-mode voltages of

the outputs. All outputs can be independently set to low voltage

states to be used with series diodes for line isolation, allowing

easy differential multiplexing over the same twisted pair cable.

The AD8146/AD8147/AD8148 are available in a 24-lead LFCSP

and operate over a temperature range of −40°C to +85°C.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

AD8146/AD8147/AD8148

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

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

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

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

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 7

Thermal Resistance ...................................................................... 7

ESD Caution.................................................................................. 7

Pin Configurations and Function Descriptions ........................... 8

Typical Performance Characteristics ........................................... 10

Theory of Operation ...................................................................... 14

Definition of Terms.................................................................... 14

Analyzing an Application Circuit............................................. 14

Closed-Loop Gain ...................................................................... 14

Calculating the Input Impedance............................................. 15

REVISION HISTORY

3/14—Rev. A to Rev. B

Changed LFCSP_VQ to LFCSP_WQ (Throughout)................... 7

Updated Outline Dimensions ....................................................... 22

Changes to Ordering Guide .......................................................... 22

8/10—Rev. 0 to Rev. A

Changes to Table 1............................................................................ 3

Changes to Table 2............................................................................ 5

Changes to Pin Configurations and Function Descriptions

Section................................................................................................ 8

Changes to Adding Pre-Emphasis to the AD8148 Section ....... 20

Updated Outline Dimensions ....................................................... 22

5/07—Revision 0: Initial Version

Data Sheet

Input Common-Mode Voltage Range in Single-Supply

Applications ................................................................................ 15

Output Common-Mode Control ............................................. 15

Sync-On Common-Mode ......................................................... 15

Applications..................................................................................... 16

Driving RGB Video Signals Over Category-5 UTP Cable.... 16

Video Sync-On Common-Mode.............................................. 16

Driving Two UTP Cables With One Driver ........................... 18

Using the AD8146 as a Receiver ............................................... 18

Output Pull-Down (OPD) ........................................................ 19

Layout and Power Supply Decoupling Considerations......... 19

Driving a Capacitive Load......................................................... 19

Adding Pre-Emphasis to the AD8148...................................... 20

Exposed Paddle (EP).................................................................. 21

Outline Dimensions ....................................................................... 22

Ordering Guide .......................................................................... 22

Rev. B | Page 2 of 24

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AD8147 반도체 회로 부품 판매점

(AD8146 - AD8148) Triple Differential Driver

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일반적인 전자부품 판매점

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