Fairchild Semiconductor ML6429 Datasheet

ML6429

75Ω Quad Video Cable Drivers and Filters

with Switchable Inputs

GENERAL DESCRIPTION

The ML6429 is a quad 4th-order Butterworth lowpass reconstruction filter plus quad video amplifier optimized for minimum overshoot and flat group delay. Each filter channel has a two-input multiplexer that switches between two groups of quad video signals. Applications driving SCART and EVC cables are supported for composite, component, and RGB video.

1V

input signals from DACs are AC coupled into the

P-P

ML6429, where they are DC restored. Outputs are AC coupled, and drive 2V can be used with DC coupled outputs for certain applications.

A fifth unfiltered channel is provided to support an additional analog composite video input. A swapping multiplexer between the two composite channels allows the distribution amplifiers to output from either input.

Several ML6429s can be arranged in a master-slave configuration where an external sync can be used for CV and RGB outputs.

into a 150Ω load. The ML6429

P-P

FEATURES

■ Cable drivers for Peritel (SCART), Enhanced Video

Connector (EVC), and standard video connectors, 75Ω cable drivers for CV, S-video, and RGB

■ 7.1MHz cutoffs CV, RGB, and S-video, NTSC or PAL

filters with mux inputs and output channel mux

■ 7.1MHz to 8.4MHz cutoffs achievable with peaking

capacitor

■ Quad 4

■ 41dB stopband attenuation at 27MHz, 0.5dB flatness

up to 4.5MHz

■ 12ns group delay flatness up to 10MHz

■ 0.4% differential gain, 0.4º differential phase on all

channels, 0.4% total harmonic distortion on all channels

■ 2kV ESD guaranteed

■ Master-slave configuration allows up to 8 multiplexed,

filtered output signals

th

-order reconstruction or dual anti-aliasing filter

BLOCK DIAGRAM

/Y1*

A/Y2*

B/Y3*

REQUIRED SYNC STRIP

MUX

CV

2

SYNCIN

23

SYNCOUT

24

CV

3

CV

4

RINA/Y4

7

RINB/Y5

8

GINA/Y6

9

GINB/Y7

10

BINA/C1

11

BINB/C2

12

A/B MUX

1

INF

INU

FILTERED CHANNEL

SYNC

TIMER

SYNC

TIMER

TRANSCONDUCTANCE

*CAN ALSO INPUT SYNC ON GREEN SIGNALS

ERROR AMP

4th-ORDER

FILTER

TRANSCONDUCTANCE

ERROR AMP

17

0.5V

FILTER

RGB

V

CCO

V

CCO

+

–

+

–

0.5V

+

–

0.5V

+

–

0.5V

+

–

0.75V

4th-ORDER

CV22V

6

CC

GNDO

19

SWAP

MUX

SWAP CVF

GND

5

×2

14

13

CV

OUT

CV

OUT

R

OUT/YOUT

G

OUT/YOUT

B

SWAP CVU

1/Y

OUT

2/Y

OUT

OUT/COUT

A

21

B

20

C

18

D

16

15

REV. 1.1 2/8/2001

ML6429

PIN CONFIGURATION

A/B MUX

CV

INU

CV

INU

RINA/Y4

RINB/Y5

GINA/Y6

GINB/Y7

BINA/C1

BINB/C2

INF

/Y1

A/Y2

B/Y3

GND

V

CC

ML6429

24-Pin SOIC (S24)

1

2

3

4

5

6

7

8

9

10

11

12

TOP VIEW

24

23

22

21

20

19

18

17

16

15

14

13

SYNCOUT

SYNCIN

V

CV

CCO

CV

1/Y

OUT

CV

2/Y

OUT

GNDO

R

OUT/YOUT

V

RGB

CCO

G

OUT/YOUT

B

OUT/COUT

SWAP CVF

SWAP CVU

OUT

C

A

B

D

PIN DESCRIPTION

PIN NAME FUNCTION

1A/B MU X Logic input pin to select between Bank

<A> or of the CV, RGB, or Y/C inputs. Internally pulled high.

2CV

3CV

4CV

/Y1 Filtered analog composite video or

INF

luma video input.

A/Y2 Unfiltered analog composite video or

INU

luma video input for Bank <A>. A composite or luma or green signal must be present on CV CV

B/Y3 inputs to provide

INU

A/Y2 or

necessary sync signals to other channels (R,G,B,Y,C). Otherwise, sync must be provided at SYNCIN. For RGB applications, the green channel with sync can be used as an input to this pin. (see RGB Applications section)

B/Y3 Unfiltered analog composite video or

INU

luma video input input for Bank . A composite or luma or green signal must be present on CV CV

B/Y3 inputs to provide

INU

A/Y2 or

necessary sync signals to other channels (R,G,B,Y,C). Otherwise, sync must be provided at SYNCIN. For RGB applications, the green channel with sync can be used as an input to this pin. (see RGB Applications section)

PIN NAME FUNCTION

5 GND Analog ground

6V

CC

Analog 5V supply

7RINA/Y4 Filtered analog RED video or luma

video input for Bank <A>

8RINB / Y5 Filtered analog RED video or luma

video input for Bank

9GINA/Y6 Filtered analog GREEN video or

luma video input for Bank <A>

10 GINB/Y7 Filtered analog GREEN video or

luma video input for Bank

11 BINA/C1 Filtered analog BLUE video or

chroma video input for Bank <A>

12 BINB/C2 Filtered analog BLUE video or

chroma video input for Bank

13 SWAP CVU Logic input pin to select whether

the outputs of CV CV

OUT

2/Y

OUT

1/Y

OUT

B are from filtered

or unfiltered CV sources. See Table

1. Internally pulled low.

14 SWAP CVF Logic input pin to select whether

the outputs of CV CV

OUT

2/Y

OUT

1/Y

OUT

B are from filtered

or unfiltered CV sources. See Table

1. Internally pulled low.

A and

2 REV. 1.1 2/8/2001

PIN DESCRIPTION

ML6429

PIN NAME FUNCTION

15 B

16

OUT/COUT

G

OUT/YOUT

Analog BLUE video output or chroma output from either B

D

Analog GREEN video output or luma output from either G

A/C1 or BINB/C2

IN

A/Y6 or GINB/

IN

Y7

17 V

RGB 5V power supply for output buffers of

CCO

the RGB drivers

18 R

OUT/YOUT

C Analog RED video output or luma

output from either RINA/Y4 or RINB/Y5

19 GNDO Ground for output buffers

CV

2/Y

B

20

OUT

Composite video output for

channel 2 or luma output.

PIN NAME FUNCTION

21

CV

1/Y

A

OUT

Composite video output for

OUT

channel 1 or luma output.

22 V

CV 5V power supply for output buffers

CCO

of the CV drivers.

23 SYNCIN Input for an external H-sync logic

signal for CVU and RGB channels. TTL or CMOS. For normal operation, SYNCOUT is connected to SYNCIN.

24 SYNCOUT Logic output for H-sync detect for

CV

A/Y2 or CV

INU

B/Y3. TTL or

INU

CMOS. For normal operation, SYNCOUT is connected to SYNCIN.

REV. 1.1 2/8/2001 3

ML6429

ABSOLUTE MAXIMUM RATINGS

Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional

Storage Temperature Range ...................... –65°C to 150°C

Lead Temperature (Soldering, 10 sec)..................... 260°C

Thermal Resistance (θJA) ...................................... 80°C/W

device operation is not implied.

OPERATING CONDITIONS

V

..................................................................................................

CC

Junction Temperature ............................................. 150°C

ESD ..................................................................... >2000V

6V

Temperature Range........................................ 0°C to 70°C

VCC Range ................................................... 4.5V to 5.5V

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, VCC = 5V ±10%, TA = Operating Temperature Range (Note 1)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

I

CC

A

V

SYNC

t

CLAMP

f

0.5dB

Supply Current No Load (VCC = 5V) 90 mA

Low Frequency Gain (All Channels) V

V

= 100mV

IN

at 300kHz 5.34 6.0 6.65 dB

P-P

Channel Sync Output Level CV/Y, R/Y, G/Y Sync Present and Clamp Settled 0.7 0.9 1.1 V

B/C Sync Present and Clamp Settled 1.2 1.4 1.5 V

Unfiltered Sync Present and Clamp Settled 0.8 1.0 1.2 V

Clamp Response Time Settled to Within 10mV, CIN=0.1µF 10 ms

0.5dB Bandwidth All Outputs 4.5 MHz

(Flatness. All Filtered Channels)

f

0.8f

f

SB

–3dB Bandwidth All Outputs (with no Peaking Cap. 6.8 7.1 MHz

C

(Flatness. All Filtered Channels) See Figures 1 and 12)

0.8 x fC Attenuation, All Filtered Channels All Outputs 1.5 dB

C

Stopband Rejection All Filtered Channels –35 –41 dB

= 27MHz to 100MHz worst case

f

IN

(See Figures 2 and 13)

V

Input Signal Dynamic Range (All Channels) AC Coupled 1.25 1.35 V

i

NOISE Output Noise (All Channels) Over a Frequency Band 1 mV

of 25Hz-50MHz

OS Peak Overshoot (All Channels) 2V

I

SC

C

Output Short Circuit Current (All Channels) Note 2 120 mA

Output Shunt Capacitance (All Channels) Load at the Output Pin 35 pF

L

Output Pulse 4.3 %

P-P

dG Differential Gain (All Channels) All Outputs 0.4 %

dΦ Differential Phase (All Channels) All Outputs 0.4 º

T

X

HD

TALK

Output Distortion (All Channels) V

OUT

= 1.8V

Crosstalk Input of .5V

at 3.58/4.43MHz 0.4 %

P-P

at 3.58/4.43MHz –55 dB

P-P

on any channel to output of any other channel

Input A/B MUX Crosstalk Input of 0.5V

Swap Mux Crosstalk Input of 0.5V

at 3.58/4.43MHz –54 dB

P-P

at 3.58/4.43MHz –52 dB

P-P

RMS

4 REV. 1.1 2/8/2001

ML6429

ELECTRICAL CHARACTERISTICS (Continued)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

PSRR PSRR (All Channels) 0.5V

∆t

t

pd

Group Delay (All Channels) at 100kHz 60 ns

Group Delay Deviation from Flatness to 3.58MHz (NTSC) 4 ns

pd

(100kHz) at V

P-P

(See Figures 3 and 14) to 4.43MHz (PAL) 7 ns

(All Channels) to 10MHz 12 ns

V

Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst case test conditions.

Note 2: Sustained short circuit protection limited to 10 seconds.

Input Voltage Logic High A/B MUX, SWAP CVU, SWAP CVF 2.5 V

IH

Input Voltage Logic Low A/B MUX, SWAP CVU, SWAP CVF 1 V

IL

CC

–39 dB

REV. 1.1 2/8/2001 5