EL4543IUZ [ROCHESTER]

TRIPLE LINE DRIVER, PDSO24, ROHS COMPLIANT, PLASTIC, QSOP-24;


型号：	EL4543IUZ
厂家：	Rochester Electronics
描述：	TRIPLE LINE DRIVER, PDSO24, ROHS COMPLIANT, PLASTIC, QSOP-24 驱动光电二极管接口集成电路驱动器
文件：	总19页 (文件大小：1225K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

EL4543

Data Sheet

September 13, 2007

FN7325.11

Triple Differential Twisted-Pair Driver with

Common-Mode Sync Encoding

Features

• Fully differential inputs, outputs, and feedback

• 350MHz -3dB bandwidth

The EL4543 is a high bandwidth triple differential amplifier

with integrated encoding of video sync signals. The inputs

are suitable for handling high speed video or other

communications signals in either single-ended or differential

form, and the common-mode input range extends all the way

to the negative rail enabling ground-referenced signalling in

single supply applications. The high bandwidth enables

differential signalling onto standard twisted-pair or coax with

very low harmonic distortion, while internal feedback

ensures balanced gain and phase at the outputs reducing

radiated EMI and harmonics.

• 1200V/µs slew rate

• -75dB distortion at 5MHz

• Single 5V to 12V operation

• 50mA minimum output current

• Low power - 36mA total typical supply current

• Pb-free available (RoHS compliant)

Applications

Embedded logic encodes standard video horizontal and

vertical sync signals onto the common mode of the twisted

pair(s), transmitting this additional information without the

requirement for additional buffers or transmission lines. The

EL4543 enables significant system cost savings when

compared with discrete line driver alternatives.

• Twisted-pair drivers

• Differential line drivers

• VGA over twisted-pair

• Transmission of analog signals in a noisy environment

The EL4543 is available in both a 24 Ld QSOP package and

a 20 Ld QFN package and is specified for operation over the

-40°C to +85°C temperature range.

Ordering Information

PART

PKG.

DWG. #

NUMBER

MARKING

PACKAGE

24 Ld QSOP

TABLE 1. SYNC SIGNAL ENCODING

EL4543IU

MDP0040

COMMON

MODE A

(RED)

COMMON

MODE B

(GREEN)

COMMON

MODE C

(BLUE)

EL4543IU-T7**

EL4543IU-T13**

EL4543IUZ

(See Note)

EL4543IUZ 24 Ld QSOP

(Pb-free)

Low

High

Low

High

3.0

2.5

2.0

2.5

2.0

3.0

2.0

2.5

2.0

2.5

3.0

EL4543IUZ-T7**

(See Note)

EL4543IUZ 24 Ld QSOP

(Pb-free)

MDP0040

EL4543IUZ-T13**

(See Note)

EL4543IUZ 24 Ld QSOP

(Pb-free)

EL4543IL

4543IL

4543ILZ

20 Ld 4x4 QFN* L20.4x4B

EL4543IL-T7**

EL4543IL-T13**

TABLE 2. INPUT LOGIC THRESHOLD (+5V SUPPLY)

, max

0.8V

EL4543ILZ

(See Note)

20 Ld 4x4 QFN* L20.4x4B

(Pb-free)

, min

EL4543ILZ-T7**

(See Note)

4543ILZ

20 Ld 4x4 QFN* L20.4x4B

(Pb-free)

EL4543ILZ-T13**

(See Note)

20 Ld 4x4 QFN* L20.4x4B

(Pb-free)

*20 Ld 4x4 QFN, exposed pad 2.7 x 2.7mm is connected to V -

**Please refer to TB347 for details on reel specifications.

NOTE: These Intersil Pb-free plastic packaged products employ

special Pb-free material sets; molding compounds/die attach

materials and 100% matte tin plate PLUS ANNEAL - e3 termination

finish, which is RoHS compliant and compatible with both SnPb and

Pb-free soldering operations. Intersil Pb-free products are MSL

classified at Pb-free peak reflow temperatures that meet or exceed

the Pb-free requirements of IPC/JEDEC J STD-020.

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

EL4543

Pinouts

EL4543

(24 LD QSOP)

TOP VIEW

EL4543

(20 LD QFN)

TOP VIEW

VINA+

VINA-

24 VOUTA+

23 VOUTA-

22 NC

VSYNC

HSYNC

15 VS+

21 VS+

14 VS-

VSYNC

HSYNC

20 VS-

THERMAL

PAD

13 NC

19 NC

12 VOUTB+

11 VOUTB-

VINB+

VINB-

18 VOUTB+

17 VOUTB-

16 NC

VINB+

VINB-

NC 10

VINC+ 11

VINC- 12

15 VOUTC+

14 VOUTC-

13 NC

FN7325.11

September 13, 2007

EL4543

Absolute Maximum Ratings (T = +25°C)

Supply Voltage (V + & V -). . . . . . . . . . . . . . . . . . . . . . . . . . . .+12V

Ambient Operating Temperature . . . . . . . . . . . . . . . .-40°C to +85°C

Maximum Output Continuous Current . . . . . . . . . . . . . . . . . . ±70mA

Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C

Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . .+135°C

+, V . . . . . . . . . . . . . . . V - + 0.8V (min) to V + - 0.8V (max)

INB S S

- - V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±5V

INB

Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below

http://www.intersil.com/pbfree/Pb-FreeReflow.asp

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and

result in failures not covered by warranty.

IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are

at the specified temperature and are pulsed tests, therefore: T = T = T

Electrical Specifications V + = +5V, V - = 0V, T = +25°C, V = 0V, R = 150Ω, unless otherwise specified.

MIN

MAX

PARAMETER

DESCRIPTION

CONDITIONS

(Note 1)

TYP

(Note 1) UNIT

AC PERFORMANCE

BW (-3dB)

-3dB Bandwidth

Differential Slew Rate

= 2V

350

1000

13.6

700

-70

MHz

V/µs

OUT

P-P

= 200Ω

600

Settling Time to 0.1%

Gain Bandwidth Product

2nd Harmonic Distortion

3rd Harmonic Distortion

STL

GBW

HD2

HD3

MHz

dBc

f = 20MHz, R = 200Ω

-70

Differential Phase @ 3.58MHz

Differential Gain @ 3.58MHz

0.01

INPUT CHARACTERISTICS

Input Referred Offset Voltage

-10

-30

-15

180

µA

kΩ

Input Bias Current (V +, V +)

-10

IN IN

Differential Input Impedance

Input Capacitance

Capacitance between any single input pin

and the power supplies

Differential Input Range

±0.75

DIFF

Input Common Mode Voltage Range

V + = +5V, V - = 0V.

2.3

See Figure 7 for higher supply voltages.

Input Referred Voltage Noise

Input Common Mode Rejection Ratio

Threshold

nV/√Hz

CMRR

= 0 to 2V

1.4

OUTPUT CHARACTERISTICS

Output Peak Current

OUT

Output Capacitance (Disabled)

Capacitance between any single output pin

and the power supplies when disabled

OUT

DC PERFORMANCE

Voltage Gain

SUPPLY CHARACTERISTICS

= 0.8V

P-P

1.82

1.96

2.05

V/V

Supply Operating Range

V + to V -

SUPPLY

Power Supply Current (per Channel)

Power Supply Rejection Ratio

12.3

14.5

16.2

PSRR

NOTE:

1. Parts are 100% tested at +25°C. Over-temperature limits established by characterization and are not production tested.

FN7325.11

September 13, 2007

EL4543

Pin Descriptions

QFN

QSOP

PIN NUMBER PIN NUMBER

PIN NAME

PIN DESCRIPTION

EQUIVALENT CIRCUIT

Disables video inputs and outputs

CIRCUIT 1

VINA+

VINA-

Non-inventing input

Inverting input

3, 8, 13

4, 7, 10, 13,

16, 19, 22

Not connected

VSYNC

Vertical sync logic input

SYNC

CIRCUIT 2

HSYNC

VINB+

Horizontal sync logic input

Non-inverting input

Inverting input

Reference Circuit 2

VINB-

VINC+

VINC-

Non-inverting input

Inverting input

VOUTC-

VOUTC+

VOUTB-

VOUTB+

VS-

Inverting output

Non-inverting output

Inverting output

Non-inverting output

Negative supply

14, Thermal

Pad

VS+

Positive supply

VOUTA-

VOUTA+

Non-inverting output

Inverting output

FN7325.11

September 13, 2007

EL4543

Typical Performance Curves

-42

-46

-50

-54

-58

-62

BALANCE ERROR =

20 LOG(Δ ,CM/Δ ,DIFF)

VO VO

BLUE CM

OUT (CH C)

GREEN CM

OUT (CH B)

RED CM

OUT (CH A)

SYNC

100k

10M

100M

TIME (0.5ms/DIV)

FREQUENCY (Hz)

FIGURE 1. COMMON MODE OUTPUT

FIGURE 2. BALANCE ERROR

= 200Ω

= 0pF

= 500Ω

22pF

12pF

8.2pF

= 200Ω

2.2pF

= 100Ω

-2

-4

-6

-2

-4

-6

= 50Ω

100k

10M

100M

100k

10M

100M

FREQUENCY RESPONSE (Hz)

FIGURE 4. DIFFFERENTIAL FREQUENCY RESPONSE FOR

FIGURE 3. DIFFERENTIAL FREQUENCY RESPONSE FOR

VARIOUS C - DIFF

VARIOUS R - DIFF

= 100Ω

= 2.2pF

12pF

= 200Ω

8.2pF

4.7pF

2.2pF

-2

-4

-6

100

100k

10M

100M

10M

100M

FREQUENCY RESPONSE (Hz)

FIGURE 6. CMRR

FIGURE 5. DIFFERENTIAL FREQUENCY RESPONSE FOR

VARIOUS C - DIFF

FN7325.11

September 13, 2007

EL4543

Typical Performance Curves (Continued)

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

SWITCH

SUPPLY VOLTAGE (V)

FIGURE 7. COMMON MODE INPUT RANGE vs SUPPLY

VOLTAGE

FIGURE 8. H

& V

THRESHOLD vs SUPPLY VOLTAGE

SYNC

-20

-40

-60

-80

= 200Ω

-100

10 11 12

10k

100k

10M

100M

FREQUENCY (Hz)

SUPPLY VOLTAGE (V)

FIGURE 9. PSRR vs FREQUENCY

FIGURE 10. I

vs V

SUPPLY SUPPLY

3.5

3.0

2.5

2.0

1.5

1.0

0.5

212ns

2.5V

ENABLE

OUTPUT

SIGNAL

TIME (200ns/DIV)

SUPPLY VOLTAGE (V)

FIGURE 11. ENABLE DISABLE vs SUPPLY VOLTAGE

FIGURE 12. ENABLE RESPONSE

FN7325.11

September 13, 2007

EL4543

Typical Performance Curves (Continued)

= 200Ω DIFF

= 0pF

ENABLE

2.5V

900ns

RISE

FALL

Δt = 2.5ns

Δt = 1.94ns

OUTPUT

SIGNAL

TIME (200ns/DIV)

TIME (20ns/DIV)

FIGURE 13. DISABLE RESPONSE

FIGURE 14. DIFFERENTIAL SMALL SIGNAL TRANSIENT

RESPONSE

LOGIC H

= 0V

= 200Ω DIFF

= 0pF

SYNC

= 0V

SYNC

RISE

FALL

Δt = 2.81ns

Δt = 2.31ns

TIME (20ns/DIV)

SUPPLY VOLTAGE (V)

FIGURE 15. DIFFERENTIAL LARGE SIGNAL TRANSIENT

RESPONSE

FIGURE 16. COMMON MODE DC LEVEL vs SUPPLY

VOLTAGE

LOGIC H

= 0V

LOGIC H

= 3V

SYNC

= 3V

SYNC

= 0V

SYNC

SUPPLY VOLTAGE (V)

FIGURE 17. COMMON MODE DC LEVEL vs SUPPLY VOLTAGE

FIGURE 18. COMMON MODE DC LEVEL vs SUPPLY VOLTAGE

FN7325.11

September 13, 2007

EL4543

Typical Performance Curves (Continued)

LOGIC H

= 3V

A = +2

SYNC

= 3V

SYNC

10k

100k

10M

100M

SUPPLY VOLTAGE (V)

FREQUENCY (Hz)

FIGURE 19. COMMON MODE DC LEVEL vs SUPPLY VOLTAGE

FIGURE 20. OUTPUT IMPEDANCE

-20

= 200Ω DIFF

CHAN A, B, C

100k

10k

-40

-60

100

-80

10k

-100

100k

10M

100M

10M

FREQUENCY (Hz)

100M

400M

FREQUENCY (Hz)

FIGURE 21. OUTPUT IMPEDANCE [DISABLED]

FIGURE 22. CHANNEL ISOLATION vs FREQUENCY

10k

-1

-3

= 200mV

OP-P

100

= 2V

OP-P

-5

100k

10M

100M

FREQUENCY (Hz)

FIGURE 23. INPUT VOLTAGE AND CURRENT NOISE

FIGURE 24. FREQUENCY RESPONSE vs OUTPUT AMPLITUDE

FN7325.11

September 13, 2007

EL4543

Typical Performance Curves (Continued)

FIGURE 26. GAIN vs FREQUENCY - 2 CHANNELS

FIGURE 28. PHASE vs FREQUENCY - 2 CHANNELS

FIGURE 30. PHASE vs FREQUENCY - 2 CHANNELS

FIGURE 25. GAIN vs FREQUENCY - 2 CHANNELS

FIGURE 27. GAIN vs FREQUENCY - 2 CHANNELS

FIGURE 29. PHASE vs FREQUENCY - 2 CHANNELS

FN7325.11

September 13, 2007

EL4543

Typical Performance Curves (Continued)

FIGURE 31. HARMONIC DISTORTION

FIGURE 32. HARMONIC DISTORTION

JEDEC JESD51-7 HIGH EFFECTIVE

THERMAL CONDUCTIVITY TEST BOARD

1.4

1.136W

1.2

0.8

0.6

0.4

0.2

75 85 100

125

150

AMBIENT TEMPERATURE (°C)

FIGURE 34. PACKAGE POWER DISSIPATION vs AMBIENT

TEMPERATURE

FIGURE 33. HARMONIC DISTORTION

JEDEC JESD51-3 LOW EFFECTIVE THERMAL

JEDEC JESD51-3 AND SEMI G42-88 (SINGLE

LAYER) TEST BOARD

CONDUCTIVITY TEST BOARD

0.8

1.2

667mW

0.7

870mW

0.6

0.5

0.4

0.3

0.2

0.1

0.8

0.6

0.4

0.2

75 85 100

125

150

75 85 100

125

150

AMBIENT TEMPERATURE (°C)

FIGURE 36. PACKAGE POWER DISSIPATION vs AMBIENT

TEMPERATURE

FIGURE 35. PACKAGE POWER DISSIPATION vs AMBIENT

TEMPERATURE

FN7325.11

September 13, 2007

EL4543

Typical Performance Curves (Continued)

JEDEC JESD51-7 HIGH EFFECTIVE THERMAL

CONDUCTIVITY TEST BOARD - QFN EXPOSED

DIEPAD SOLDERED TO PCB PER JESD51-5

2.5

2.500W

1.5

0.5

75 85 100

125

150

AMBIENT TEMPERATURE (°C)

FIGURE 37. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE

differential output signals, decoded and transmitted along

with the RGB video signals to the video monitor.

Operational Description and Application

Information

Introduction

The EL4543 is designed to differentially drive composite

RGB video signals onto twisted pair lines, while

INA

OUTA

simultaneously encoding horizontal and vertical sync signals

as common mode output. The entire video signal plus sync

can therefore be transmitted on 3 twisted pairs of wire. When

utilizing CAT5 cable, the 4th available twisted pair can be

used for transmission of audio, data or control information.

The distribution of composite video over standard CAT5

cable enables enormous cost and labor savings compared

with traditional coaxial cable, when considering both the

relative low price and ease of pulling CAT5 cable.

REF

INB

OUTB

SYNC

RCM

GCM

BCM

REF

LOGIC

DECODING

Functional Description

INC

OUTC

The EL4543 provides three fully differential high-speed

amplifiers, suitable for driving high-resolution composite

video signals onto twisted pair or standard coaxial cable.

The input common-mode range extends to the negative rail,

allowing simple ground-referenced input termination to be

used with a single supply. The amplifiers provide a fixed gain

of +2 to compensate for standard video cable termination

REF

FIGURE 38. BLOCK DIAGRAM EL4543

Sync Transmission

The EL4543 encodes H

and V

SYNC

signals on the

SYNC

common mode output of the differential video signals; Red,

Green and Blue respectively. Data Sheet Figures 16, 17 and

18 clearly illustrate that the sum of the common mode

voltages results in a fixed average DC level with no AC

content and illustrates the logic levels. This eliminates EMI

radiation into any common mode signal along the twisted

pairs of CAT5 cable.

schemes. Horizontal and Vertical sync signals (H

and

SYNC

) are passed to an internal Logic Encoding Block to

SYNC

encode the sync information as three discrete signals of

different voltage levels. Generally, in differential amplifiers an

external V

pin is used to control the common mode level

REF

of the differential output; in the case of the EL4543 the V

REF

of each of the three internal amplifier channels receives a

signal from the Logic Encoding Block with encoded H

SYNC

information. The final output consists of three

and V

SYNC

fully differential video signals, with sync encoded on the

common mode of each of the three RGB differential signals.

and V

SYNC

can easily be separated from the

SYNC

FN7325.11

September 13, 2007

EL4543

EL9110's common mode output pin, decodes and transmits

and V to the output device.

Extract Common Mode Sync and Decode H

SYNC

and V

SYNC

and V can be regenerated from the Common

SYNC

Sync Transmission

Mode sync output voltages. The relationships between

, V and the 3 common mode levels are given by

The EL4543 encodes H

and V signals onto the

SYNC

SYNC SYNC

common mode output of the differential video signals; Red,

Green and Blue respectively. Data Sheet Figure 8 clearly

illustrates that the sum of the common mode voltages results

in a fixed DC level with no AC content; thus eliminating EMI

interference.

Table 1. The common mode levels are easily separated from

the differential outputs of the EL4543 using this simple

resistor network at the cable receiver input of each

differential channel; see Figure 39.

Twisted Pair Termination

Output Drive Protection

The schematic in Figure 39 illustrates a termination scheme for

50Ω series termination and a 100Ω twisted pair cable. Note

RCM is the common mode termination to allow measurement

The EL4543 has internal short circuit protection set typically

at 60mA. if the output is shorted for extended periods of time

the increased power dissipation will eventually destroy the

part. To realize maximum reliability the output current should

never exceed 60mA. The 50Ω series back load matching

resistor provides additional protection.

of V

and should not be too small since it loads the EL4543; a

little over a 100Ω is recommended for RCM.

TYPICAL EL4543 TERMINATION DRIVER

TWISTED

PAIR

50Ω

Supply Voltage

50Ω

While the EL4543 can be operated on ±5V split rails, single

supply 0V to 5V is the most common usage. It is very

important to note that the input logic thresholds are relative

to the negative supply pin, and therefore single supply,

ground referenced logic will not work when driving the

EL4543 on split rails. The amplifiers have an input common

mode range from 0V to 2.3V with a 0V to 5V supply,

50Ω

=100Ω

120Ω

(RCM: SHOULD BE >100Ω)

(FOR LOADING

CONSIDERATIONS)

REF

FIGURE 39. TWISTED PAIR TERMINATION EL4543

Video Transmission

increasing with supply voltage (see Figure 7). The common

mode output DC level range is a linear function of the power

supply (see Figures 16, 17, 18, and 19). The common mode

input switching threshold as well as the Enable/Disable input

is a linear function of the supply voltage (see Figures 8 and

11). In the event that the EL4543 is to be used with ±5V split

rails then the input sync signals need to be voltage offset

before they are input to the EL4543. The circuit configuration

depicted in Figure 40 provides for the proper level shift.

The EL4543 is a twisted pair differential line driver directed at

the transmission of Video Signals through cables up to 100

feet; however, as signal losses increase with transmission line

length the EL4543 will need additional support to equalize

video signals along longer twisted pair transmission lines. A

full solution to accomplish this is the SXGA Video

Transmission System presented in the EL4543 Data Sheet.

Note the inclusion of the EL9110 for signal equalization of up

to 1000ft of CAT5 cable and common mode extraction; see

Data Sheet for additional information on the EL9110.

KST2907A

EL4543

HSYN Pin

Horizontal Sync in

Long Distance Video Transmission

4.30k

The SXGA Video Transmission System makes it possible to

transmit Red, Green and Blue (RGB) video plus sync up to

1000 feet through CAT5 cable. The input to the SXGA Video

Transmission System is the output of a video source

2.70k

-5V

KST2907A

EL4543

VSYN Pin

transmitting RGB video signals plus sync. The signals are

received initially by the EL4543; which converts the single

ended input RGB signals to three fully differential waveforms

with sync encoded on the discrete common modes of each

color channel and then drives the signals through a length of

CAT5 cable. The signal is received by the EL9110, which

can provide 6-pole equalization for both high and low

frequency signal transmission line losses. Then the EL9110

converts the differential RGB video signals back into single

ended format while extracting the common mode component

for decoding. The single ended RGB signal is taken directly

from the output of the El9110 and is ready for the output

device. The Common Mode Decoder Circuit receives the

common mode signals directly from each of the three

Vertical Sync in

4.30k

2.70k

-5V

FIGURE 40. LEVEL SHIFTING SYNC SIGNALS FOR USE

WITH ±5V SPLIT RAILS

FN7325.11

September 13, 2007

EL4543

Having obtained the application's power dissipation, the

maximum junction temperature can be calculated:

Disable and Power Down

The EL4543 provides an enable disable function which

powers down, logic input high, in 900ns and powers up, logic

input low, in 212ns. Disabled the amplifiers supply current is

reduced to 1.8mA (Positive Supply) and 0mA (Negative

Supply). Note that Enable/Disable threshold is a linear

function of the supply voltage levels. The Enable/Disable

threshold voltage level is compatible with standard

= T

+ Θ × PD

MAX JA

(EQ. 2)

JMAX

where:

• T

is the maximum junction temperature (125°C)

is the maximum ambient operating temperature

JMAX

• T

MAX

TTL/CMOS and referenced to the lowest supply potential.

• PD is the power dissipation calculated above

Proper Layout Technique

• θ is the thermal resistance, junction to ambient, of the

application (package + PCB combination). Refer to the

Package Power Dissipation curves.

A critical concern with any PCB layout is the establishment

of a “healthy” ground plane. It is imperative to provide

ground planes terminated close to inputs to minimize input

capacitance. Additionally, the ground plane can be

selectively removed from inputs to prevent load and supply

currents from flowing near the input nodes.

• Note:

For the QFN package, the thermal pad is internally

connected to VS- and may only be grounded in

applications where a single supply is used and VS- is

returned to ground. In applications where VS- is tied to a

negative voltage the thermal pad must also be connected

to the same negative voltage.

In general the following guidelines apply to all PCB layout:

• Keep all traces as short as possible.

• Keep power supply bypass components as close to the

chip as possible - extremely close.

See Technical Bulletin 389

(http://www.intersil.com/data/tb/TB389.pdf) for additional

QFN PCB layout information.

• Create a healthy ground with low impedance and

continuous ground pathways available to all grounded

components board-wide.

Application Circuit

• In high frequency applications on multi-level boards try to

keep one level of board with continuous ground plane and

minimum via cutouts - providing it is affordable.

Video Transmission Along CAT5 Cable

VGA input RGB plus sync is connected with 75Ω termination

to the inputs of the EL4543. Single-ended RGB video is

converted to differential mode signals with H

and

encoded on the common-mode of the three

• Provide extremely short loops from power pin to ground.

SYNC

• If it is affordable, a ferrite bead is always of benefit to

isolate device from Power Supply noise and the rest of the

circuit from the noise of the device.

differential signals, respectively. The 50Ω output-terminated

EL4543 drives the differential RGB with sync encoded

common-mode to CAT5 twisted pair cables. Note this

system, without signal frequency equalization, will

Power Dissipation Calculation

When switching at high speeds, or driving heavy loads, the

EL4543 drive capability is ultimately limited by the rise in die

temperature brought about by internal power dissipation. For

satisfactorily transmit along up to 200ft of CAT5 twisted-pair.

For longer cable lengths, frequency and gain equalization to

compensate for signal degradation is recommended

(EL9110) and a delay line technology (EL9115) to adjust for

phase mismatch between signals at the receiving end.

reliable operation die temperature must be kept below T

JMAX

(125°C). It is necessary to calculate the power dissipation for

a given application prior to selecting package type. Power

dissipation may be calculated:

ΔV

⎛

⎞

⎟

⎠

-----------

PD = 3 × V × I

+ V ×

⎜

(EQ. 1)

SMAX

⎝

where:

• V is the total power supply to the EL4543 (from V + to V -)

• I

= Maximum quiescent supply current per channel

SMAX

• ΔV = Maximum differential output voltage of the

application

• R = Differential load resistance

• I

LOAD

= Load current

FN7325.11

September 13, 2007

EL4543 and EL9110 Sync Extraction

CAT1

CAT2

RJOUTA+

49.9

R32 75

EL4543 QSOP

OUTA+

OUTA-

N.C.

Red Out Differential

RED

C34

INA+

INA-

N.C.

0.1uf

RJA+ 75

RJOUTA-

49.9

VS+

+VS

R31 75

GREEN

VS+

+VS

0.1uf

C35

VSYNC

HSYNC

N.C.

VS-

RVSYNC 1K

N.C.

RJOUTB+

49.9

RHSYNC

VS-

RED

GREEN

C35a

200pF

OUTB+

OUTB-

N.C.

BLUE

Green Out Differential

EL8201IS

R30

R29

INB+

INB-

RJOUTB-

49.9

RJB+ 75

RJC+ 75

INPUT

RJOUTC+

49.9

N.C.

OUTC+

OUTC-

N.C.

HSYNC

Blue Out Differential

VSYNC

INC+

INC-

BLUE

RJOUTC-

49.9

OUTPUT

UJ1

-VS

+VS

-VS

D10

DIODE

+VS

-VS

DIODE D12

DIODE D11

DIODE D2

DIODE D4

DIODE D1

+VS

-VS

DIODE

-VS

+VS

DIODE

DIODE D6

VCRTL

VadjBlu

+VS

-VS

C20

1uf

DIODE D7

VadjRed

DIODE

VCRTL

Green InDifferential

Red In Differential

Blue In Differential

R31

330

Rred4

3000

1uf

C12

C23

R14

GREEN

RED

Cmext

BLUE

R15

49.9

R26

49.9

R27

49.9

R16

Ctrl-ref

Vctrl

Cmext

Vsp

Ctrl-ref

Vctrl

Cmext

Vsp

Ctrl-ref

Vctrl

R21

R10

R32

R6 1K

R30 1K

R32 1K

Vsp

Vinp

Enbl

Vspo

Vout

Vsmo

Vinp

Enbl

Vspo

Vout

Vsmo

Vinp

Enbl

Vspo

Vout

Vsmo

R29

49.9

R31

49.9

+VS

Vinm

Vsm

Cmout

Vgain

Logic-ref

Vinm

Vsm

Cmout

Vgain

Logic-ref

Vinm

Vsm

Cmout

Vgain

Logic-ref

+VS

49.9

0.1uf

C31

0.1uf

C32

C13

0.1uf

C24

C2 0.1uf

0.1uf

C33

R33

+VS

R11

1uf

R22

49.9

R17

49.9

R28

49.9

R18

R29

C14

C25

EL9110 BLUE C

EL9110 GREEN B

EL9110 RED A

330

R20

330

R27

330

C17

0.1uf

C27

0.1uf

-VS

VGAN

-VS

VGAN

-VS

INDUCTOR 1

INDUCTOR3

INDUCTOR 5

1uf

C16

1uf

C26

1uf

C18

1uf

C19

0.1uf

C28

C29

0.1uf

R12

R23

R28

1uf

0.1uf

+VS

-VS

+VS

NL = Not Loaded

Inductor =Ferrite 68 Ohms

BANANA JACK

GND

R33

3.6K

C36

4.7uf

R34

3.6K

R35

3.6K

C37

0.1uF

R39

3.6K

BANANA JACK

-VS

C38

R36

1K Pot

C39

R40

1K Pot

R37

1K Pot

R38

1K Pot

4.7uf

VadjBlue

VGAN

VCRTL

0.1uF

VadjRed

BANANA JACK

EL4543

measure of cable prop delay skew compensation for slight

EL4543/EL5375/EL8201 CAT5 RGB + Sync

Video Transmission System

Introducing a low cost turn-key system for transmitting

component video over short to moderate CAT5 cable lengths

(1 to 500 feet) with selectable cable loss and skew

differences in cable lengths between CAT5 pairs. Cable

skew can best be done around the 300ft range by under

compensating the shortest color pair (color on the left side of

a vertical line) and over compensate the longest color pair

(color on the right side of a vertical line). Around 450ft only

the shortest color pair can be under compensated.

compensation. Using only 3 of the 4 pairs in standard CAT5

the 4 pair is available for audio, function control or data

The board for the driver and receiver should use strip lines

or strip line waveguides for the inputs and outputs of the

drivers and receivers. The 75Ω input and output strip lines

waveguide on 0.06 inch epoxy board with ground back plain

should be 0.016 inch wide with 0.01 inch space to ground

area around them. The differential pair strip line waveguides

should be two 0.045 inch 50Ω lines spaced 0.01 inch apart

and spaced 0.01 inch to ground area around them. This is a

general guide and size values may very for many reasons.

transmission; an additional benefit.

RGB video plus sync (5 channels) is received at the VGA

terminal and presented single ended to the EL4543. The

EL4543 converts single ended RGB into fully differential

signals on three twisted pairs. Sync is encoded on the three

RGB differential signals as differential common mode and

then drives the differential signals with encoded sync

through CAT5 cable. The common mode of the signals is

extracted from the differential signals with a passive network

of resistors and passed to the EL8201 for sync decoding.

The differential signal is passed directly to the EL5375 where

it is amplified, converted back into single ended format.

Signal attenuation occurs in all transmission lines as a

function of increasing cable length; this application system

utilizes individual channel 2-pole compensation for cable

lengths of 150, 300 and 500 feet. Additionally, the

The receiver feedback and gain resistor network which goes

directly to the minus input should be connected very close

with minimal trace length and minimal capacitance to

ground. The ground plane on the backside of the board, in

back of these resistors and the minus input pin should be

removed as well.

compensation network can be manipulated to provide some

FN7325.11

September 13, 2007

EL4543/EL5375/EL8201 CAT5 RGB + Sync Video Transmission System

Output +5V

R34

Open

R35

R40

REF1

FB1

INP1

INN1

R41

C20

OUT1

~4pF

R47

500

R48

150 Feet Comp

300 Feet Comp

Output +5V

R36

Open

R12

R13

Output +5V

R53 10K

C7 C8

10p

R55 3.9K

0.1uF

R54

68K

R37

R56

33K

REF2

INP2

INN2

VSP

VSN

36p

68p

C10

22p

0.1uF

R14

49.9

R43

18Output -5V

Output +5V

R38

R21

FB2

0.1uF

Open

150 Feet Comp

R57 10K

300 Feet Comp

R59 3.9K

C13

68p

C21

~4pF

Compensation Control Switch

On Off

R39

R49

500

R50

R44

REF3

INP3

INN3

OUT2

R58

68K

C12

10p

C14

22p

R60

33K

C11

36p

FB3

R15

R16

SW DIP-6

OUT3

Red In

R45

49.9

R51

R52

500

EL4543 QSOP

OUTA+

OUTA-

N.C.

300 Feet Comp

150 Feet Comp

R63 10K

EL5375

Red Out Differential

3.9K

R61

R64

68K

R17

49.9

INA+

INA-

N.C.

R62

33K

C15

68p

C18

10p

C16

22p

C17

36p

49.9

C22

~4pF

R46

R63

Input +5V

R22

0.1uF

VS+

R64

R65 75

0.1uf

VSYNC

HSYNC

N.C.

VS-

N.C.

R3 1K

49.9

OUTB+

OUTB-

N.C.

R66 75

R67 75

Green Out Differential

R18

R19

Green In

Blue In

INB+

INB-

49.9

INPUT

C19

0.1uF

OUTPUT

R10

R20

49.9

VS+

49.9

N.C.

OUTC+

OUTC-

N.C.

Blue Out Differential

Output +5V

INC+

INC-

R11

49.9

0.1uF

R23

C4a

220pF

EL4543IU

VS-

EL8201IS

Input +5V

Input -5V

JB1

JB2

-VS In

+VS In

Csup2

4.7uF

JP+

JUMPER

Ground

Csup1

JP-

JUMPER

4.7uF

JB3

GND

Output +5V

Output -5V

JB4

JB5

-VS Out

+VS Out

Csup4

4.7uF

Csup3

4.7uF

JB6

GND

OUTPUT

INPUT

EL4543

Package Outline Drawing

L20.4x4B

20 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE

Rev 1, 11/06

2.0

4.00

0.50

16X

PIN #1 INDEX AREA

PIN 1

INDEX AREA

2 .70 REF

(4X)

0.15

0.10 M

A B

20X 0.25 ± 0.02

20X 0.4 ± 0.05

TOP VIEW

BOTTOM VIEW

SEE DETAIL "X"

0.10

0 . 90 ± 0 . 1

BASE PLANE

( 3. 8 TYP )

(

SEATING PLANE

0.08 C

2. 70 )

( 20X 0 . 5 )

SIDE VIEW

( 20X 0 . 25 )

( 20X 0 . 6)

0 . 2 REF

0 . 00 MIN.

0 . 05 MAX.

TYPICAL RECOMMENDED LAND PATTERN

DETAIL "X"

NOTES:

1. Dimensions are in millimeters.

Dimensions in ( ) for Reference Only.

2. Dimensioning and tolerancing conform to AMSE Y14.5m-1994.

3. Unless otherwise specified, tolerance : Decimal ± 0.05

4. Dimension b applies to the metallized terminal and is measured

between 0.15mm and 0.30mm from the terminal tip.

Tiebar shown (if present) is a non-functional feature.

The configuration of the pin #1 identifier is optional, but must be

located within the zone indicated. The pin #1 identifier may be

either a mold or mark feature.

FN7325.11

September 13, 2007

EL4543

Quarter Size Outline Plastic Packages Family (QSOP)

MDP0040

QUARTER SIZE OUTLINE PLASTIC PACKAGES FAMILY

(N/2)+1

INCHES

SYMBOL QSOP16 QSOP24 QSOP28 TOLERANCE NOTES

0.068

0.006

0.056

0.010

0.008

0.193

0.236

0.154

0.025

0.041

0.068

0.006

0.056

0.010

0.008

0.341

0.236

0.154

0.025

0.041

0.068

0.006

0.056

0.010

0.008

0.390

0.236

0.154

0.025

0.041

Max.

±0.002

±0.004

±0.002

±0.001

±0.004

±0.008

±0.004

Basic

PIN #1

I.D. MARK

(N/2)

1, 3

0.010 C A B

2, 3

SEATING

±0.009

Basic

PLANE

0.007 C A B

0.004 C

Reference

Rev. F 2/07

NOTES:

1. Plastic or metal protrusions of 0.006” maximum per side are not

included.

2. Plastic interlead protrusions of 0.010” maximum per side are not

included.

SEE DETAIL "X"

3. Dimensions “D” and “E1” are measured at Datum Plane “H”.

4. Dimensioning and tolerancing per ASME Y14.5M-1994.

0.010

GAUGE

PLANE

4°±4°

DETAIL X

All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.

Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality

Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without

notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and

reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result

from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.

For information regarding Intersil Corporation and its products, see www.intersil.com

FN7325.11

September 13, 2007

EL4543IUZ [ROCHESTER]

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EL4543_0709

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EL4581

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EL4581CN

EL4581CN