Rainbow Electronics MAX9508 User Manual

General Description

The MAX9508 video filter amplifier with SmartSleep™
and bidirectional video support is ideal for set-top
boxes (STBs), portable DVD players, and portable
media players (PMPs). The inputs can be directly con­nected to the digital-to-analog converter (DAC) outputs.
The reconstruction filter removes high-frequency sig­nals above 6.75MHz. The amplifiers have 6dB of gain,
and the outputs can be DC-coupled to a load of 75Ω,
which is equivalent to two video loads, or it can be
AC-coupled to a load of 150Ω.

The SmartSleep circuitry intelligently reduces power
consumption based on the presence of the input signal
and the output loads. When the MAX9508 does not
detect the presence of sync on the input video signal,
the supply current is reduced to less than 7µA. The
device only enables a video amplifier when there is an
active video input signal and an attached load. The
video amplifier remains on while a load is connected. If
the load is disconnected, the video amplifier is turned off.

The MAX9508 contains three reconstruction filters, four
video amplifiers, and a pulldown switch at one of the
two CVBS outputs. The MAX9508 has the ability to con­trol the bidirectional video signals at the CVBS video
connections without the need for separate switches or
relays. This feature is particularly useful for portable
DVD players, which often use the same connector to
drive a composite video output and to accept an exter­nal video signal to display on the LCD panel.

The MAX9508 operates from a 2.7V to 3.6V single supply
and is offered in a small 16-pin TQFN (3mm x 3mm)
package. The device is specified over the -40°C to
+125°C automotive temperature range.

Applications

Set-Top Boxes (STBs)

Portable Set-Top Boxes/
Personal Video Recorders (PVRs)

Portable Media Players (PMPs)

Portable DVD Players

Portable Applications

Features

 SmartSleep Feature Detects Input Signal and

Output Load Status to Reduce Power
Consumption

 Triple Standard-Definition Video Reconstruction

Filters with 6.75MHz Passband

 Luma, Chroma, and Composite Inputs

 Luma, Chroma, and Two Composite Outputs

 Integrated Support for a Bidirectional Composite

Video Signal

 Supports Two Video Loads at Each Output

(DC-Coupled)

 2.7V to 3.6V Single-Supply Operation

MAX9508

Video Filter Amplifier with SmartSleep and

Bidirectional Video Support

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

19-0531; Rev 0; 5/06

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Block Diagrams

Note: All devices are specified over the -40°C to +125°C operat­ing temperature range.

+

Denotes lead-free package.

*

Future product—contact factory for availability.

**

EP = Exposed pad.

SmartSleep is a trademark of Maxim Integrated Products, Inc.

Pin Configurations appear at end of data sheet.

Block Diagrams continued at end of data sheet.

PART PIN-PACKAGE PKG CODE TOP MARK

MAX9508ATE+

MAX9508AEE+* 16 QSOP E16-4 —

16 TQFN-EP**
(3mm x 3mm)

T1633-4 AEM

CIN

YIN

INT/EXT

SMARTSLEEP

SHDN

CVBSIN

BUFFER

BUFFER

ACTIVE VIDEO

CONTROL

LOGIC

DETECT

BUFFER

LPF

LPF

MAX9508

6dB

6dB

6dB

LOAD SENSE

COUT

LOAD SENSE

YOUT

LOAD SENSE

CVBSOUT1

LPF

LOAD SENSE

6dB

EXTCVBSIN

CLAMP

CVBSOUT2

MAX9508

Video Filter Amplifier with SmartSleep and
Bidirectional Video Support

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= V

SHDN

= 3.3V, V

SMARTSLEEP

= V

INT/EXT

= GND = 0V, RL= No load. TA= T

MIN

to T

MAX

, unless otherwise noted. Typical val-

ues are at T

A

= +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

(Voltages with respect to GND.)
V

DD ..........................................................................

-0.3V to +4V

SMARTSLEEP, SHDN, INT/EXT

CIN, YIN, CVBSIN, EXTCVBSIN ..........................-0.3V to +4V

Duration of COUT, YOUT, CVBSOUT1, CVBSOUT2

Short Circuit to VDDor GND ..................................Continuous

Continuous Input Current

(CIN, YIN, EXTCVBSIN, CVBSIN,

SMARTSLEEP, SHDN, INT/EXT)...................................±20mA

Continuous Power Dissipation (TA= +70°C)

16-Pin TQFN (derate 15.6mW/°C above +70°C)..........1250mW

16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW

Operating Temperature Range .........................-40°C to +125°C

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

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

Lead Temperature (soldering, 10s) .................................+300°C

Supply Voltage Range V

Supply Current I

Shutdown Supply Current I

SMARTSLEEP CHARACTERISTICS

Minimum Line Frequency CVBSIN 14.3 kHz

Sync Slice Level CVBSIN 4.1 5.2 % V

Output Load Detect Threshold Sync pulse present, RL to GND 200 Ω

DC CHARACTERISTICS

Input-Voltage Range V

Input Current I

Input Resistance R

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DD

DD

SHDN

IN

Guaranteed by PSRR 2.7 3.6 V

INT/E X T = G N D ( 4 channel s acti ve) ,
YIN = CVBSIN = 0.3V, CIN = 0.6V

INT/EXT = VDD (1 channel active),
EXTCVBSIN is unconnected

SMARTSLEEP = V
CVBSIN has no active video signal

SMARTSLEEP = VDD, CVBSIN has a black­burst video signal with sync tip at GND
(Note 2)

V

= GND 0.01 10 µA

SHDN

C IN , Y IN , C V BS IN ,
g uar anteed b y outp ut

IN

vol tag e sw i ng

CIN = YIN = CVBSIN = 0V 2 5 µA

CIN, YIN, CVBSIN 20 MΩ

IN

DD,

2.7V < VDD < 3.6V 0 1.05

3.0V < V

< 3.6V 0 1.2

DD

13 16

4.3 6

714

17

mA

µA

DD

V

MAX9508

Video Filter Amplifier with SmartSleep and

Bidirectional Video Support

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VDD= V

SHDN

= 3.3V, V

SMARTSLEEP

= V

INT/EXT

= GND = 0V, RL= No load. TA= T

MIN

to T

MAX

, unless otherwise noted. Typical val-

ues are at T

A

= +25°C.) (Note 1)

Sync-Tip Clamp Level V

Inp ut C l am p i ng C ur r ent EXTCVBSIN = 500mV + V

EXTCVBSIN Input Voltage Range

Sync Crush

Maximum Input Source
Resistance

DC Voltage Gain A

DC Gain Matching

Output Level

Output Voltage Swing

Output Resistance R

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CLP

EXTCVBSIN 0.25 0.37 V

Guaranteed by

2.7V < VDD < 3.6V 1.05

output voltage
swing

3.0V < V

EXTCVBSIN, percentage reduction in sync
pulse (0.3V

), guaranteed by input

P-P

clamping current measurement, measured
at input

EXTCVBSIN 300 Ω

RL = 150Ω to VDD/2, 0V ≤ VIN ≤ 1.05V,

V

= 2.7V

V

DD

R

= 150Ω to VDD/2, 0V ≤ VIN ≤ 1.05V,

L

= 2.7V

V

DD

YIN = CVBSIN = CIN = 0V,
INT/EXT = GND, R

C

EXTCVBSIN

INT/EXT = V

= 150Ω to GND

L

= 0.1µF to GND,

= 150Ω to GND

DD, RL

Measured at output,
V

= 2.7V,

DD

0V ≤ V
R

≤ 1.05V,

IN

= 150Ω to -0.2V

L

Measured at output, VDD = 2.7V,
0V ≤ V

≤ 1.05V, RL = 150Ω to VDD / 2

IN

Measured at output,

= 3V,

V

DD

0V ≤ V
R

≤ 1.2V,

IN

= 150Ω to -0.2V

L

Measured at output, VDD = 3V,
0V ≤ V

≤ 1.2V, RL = 150Ω to VDD / 2

IN

Measured at output, V

≤ 1.05V, RL = 75Ω to -0.2V

IN

= 1.3V, -5mA ≤ I

OUT

OUT

0V ≤ V

V

CLP

< 3.6V 1.2

DD

0.5 1 1.5 µA

5.7 6 6.3 dB

-0.2 0 +0.2 dB

0.21 0.3 0.38

0.21 0.27 0.38

TA = -40°C to
+85°C

T

= -40°C to

A

+125°C

2.027 2.1 2.163

2.006 2.163

2.027 2.1 2.163

TA = -40°C to
+85°C

= -40°C to

T

A

+125°C

2.316 2.4 2.472

2.292 2.472

2.316 2.4 2.472

= 3.135V,

DD

≤ +5mA 0.47 Ω

LOAD

2.027 2.1 2.163

V

P-P

2%

V

V

P-P

MAX9508

Video Filter Amplifier with SmartSleep and
Bidirectional Video Support

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDD= V

SHDN

= 3.3V, V

SMARTSLEEP

= V

INT/EXT

= GND = 0V, RL= No load. TA= T

MIN

to T

MAX

, unless otherwise noted. Typical val-

ues are at T

A

= +25°C.) (Note 1)

AC ELECTRICAL CHARACTERISTICS

(VDD= V

SHDN

= 3.3V, V

SMARTSLEEP

= V

INT/EXT

= GND = 0V, RL= 150Ω to GND. TA= T

MIN

to T

MAX

, unless otherwise noted. Typical

values are at T

A

= +25°C.) (Note 1)

Power-Supply Rejection Ratio PSRR

Output Pulldown Resistance R

Output Shutdown Impedance 28 kΩ

LOGIC INPUTS (SMARTSLEEP, SHDN, INT/EXT)

Logic-Low Threshold V

Logic-High Threshold V

Logic Input Current IIL / I

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Standard-Definition
Reconstruction Filter

Differential Gain DG

Differential Phase DP

2T Pulse Response 2T = 200ns or 250ns 0.2 K%

2T Bar Response

2T Pulse-to-Bar K
Rating

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Inputs are 1V
frequency is 1MHz.

DC-coupled output,
5-step modulated staircase

AC-coupled output,
5-step modulated staircase

DC-coupled output,
5-step modulated staircase

AC-coupled output,
5-step modulated staircase

Bar time is 18µs, the beginning 2.5% and the ending 2.5%
of the bar time is ignored, 2T = 200ns or 250ns

Bar time is 18µs, the beginning 2.5% and the ending 2.5%
of the bar time is ignored, 2T = 200ns or 250ns

2.7V ≤ V
R

= 150Ω to GND

L

INT/EXT = VDD, CVBSOUT1 3.7 Ω

PD

IL

IH

VI = 0V or V

IH

P-P

≤ 3.6V, input referred,

DD

DD

, reference

f = 5.5MHz -0.1

f = 6.75MHz -1 -0.3 +1

f = 11MHz -3

f = 27MHz -33 -41

f = 3.58MHz or

4.43MHz

f = 3.58MHz or

4.43MHz

f = 3.58MHz 0.62

f = 4.43MHz 0.75

f = 3.58MHz 0.78

f = 4.43MHz 1.01

48 dB

0.7 x
V

DD

0.01 10 µA

0.2

0.4

0.2 K%

0.3 K%

0.3 x
V

DD

V

V

dB

%

D eg r ees

MAX9508

Video Filter Amplifier with SmartSleep and

Bidirectional Video Support

_______________________________________________________________________________________ 5

Note 1: All devices are 100% production tested at TA= +25°C. Specifications over temperature limits are guaranteed by design.
Note 2: Specified current is an average over time.

AC ELECTRICAL CHARACTERISTICS (continued)

(VDD= V

SHDN

= 3.3V, V

SMARTSLEEP

= V

INT/EXT

= GND = 0V, RL= 150Ω to GND. TA= T

MIN

to T

MAX

, unless otherwise noted. Typical

values are at T

A

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Nonlinearity 5-step staircase 0.1 %

Interchannel Timing
Error

Group Delay
Distortion

Interchannel Group
Delay Distortion Error

Peak Signal to RMS
Noise

Power-Supply
Rejection Ratio

Output Impedance f = 5MHz 6 Ω

Enable Time

Disable Time

CROSSTALK

All Hostile Output
Crosstalk

All Hostile Input
Crosstalk

Difference in time between the 50% point of the output
signals, YOUT to COUT

100kHz ≤ f ≤ 5MHz, inputs are 1V

Inputs are 1V

100kHz ≤ f ≤ 5MHz, inputs are 1V

f = 100kHz, 200mV

YIN = 1V, output settled to within 1% of the final voltage,
R

L

YIN = 1V, output settled to within 1% of the final voltage,
R

L

f = 4.43MHz -70 dB

f = 4.43MHz, SHDN = GND,
input termination resistors are 75Ω

P-P

, input referred 43 dB

P-P

= 150Ω to GND

= 150Ω to GND

P-P

P-P

0.2 ns

10 ns

2ns

67 dB

13 µs

1.1 µs

-69 dB

MAX9508

Video Filter Amplifier with SmartSleep and
Bidirectional Video Support

6 _______________________________________________________________________________________

Typical Operating Characteristics

(VDD= SHDN = +3.3V, V

SMARTSLEEP

= V

INT/EXT

= GND = 0V. RL = 150Ω to GND. TA= +25°C, unless otherwise noted.)

SMALL-SIGNAL GAIN

vs. FREQUENCY

MAX9508 toc01

FREQUENCY (Hz)

OUTPUT AMPLITUDE (dB)

10M1M

-50

-40

-30

-20

-10

0

10

20

-60
100k 100M

V

OUT

= 100mV

P-P

NORMALIZED TO 1MHz

SMALL-SIGNAL GAIN FLATNESS

vs. FREQUENCY

MAX9508 toc02

FREQUENCY (Hz)

OUTPUT AMPLITUDE (dB)

1M 10M

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1.0

-1.0
100k 100M

V

OUT

= 100mV

P-P

NORMALIZED TO 1MHz

LARGE-SIGNAL GAIN

vs. FREQUENCY

MAX9508 toc03

FREQUENCY (Hz)

OUTPUT AMPLITUDE (dB)

10M1M

-50

-40

-30

-20

-10

0

10

20

-60
100k 100M

V

OUT

= 2V

P-P

NORMALIZED TO 1MHz

LARGE-SIGNAL GAIN FLATNESS

vs. FREQUENCY

MAX9508 toc04

FREQUENCY (Hz)

OUTPUT AMPLITUDE (dB)

1M 10M

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1.0

-1.0
100k 100M

V

OUT

= 2V

P-P

NORMALIZED TO 1MHz

GROUP DELAY

MAX9508 toc05

FREQUENCY (Hz)

DELAY (ns)

10M1M

0

25

50

75

100

125

150

-25

100k 100M

V

OUT

= 2V

P-P

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

MAX9508 toc06

FREQUENCY (Hz)

PSRR (dB)

10M1M100k

-70

-60

-50

-40

-30

-20

-10

0

-80
10k 100M

QUIESCENT SUPPLY CURRENT

vs. TEMPERATURE

MAX9508 toc07

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

1007550250-25

11.5

12.0

12.5

13.0

13.5

14.0

11.0

-50 125

VOLTAGE GAIN

vs. TEMPERATURE

MAX9508 toc08

TEMPERATURE (°C)

VOLTAGE GAIN (V/V)

1007550250-25

1.96

1.97

1.98

2.00

1.99

2.01

2.02

1.95

-50 125

OUTPUT VOLTAGE

vs. INPUT VOLTAGE

MAX9508 toc09

INPUT VOLTAGE (V)

OUTPUT VOLTAGE (V)

1.51.00.50

0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

-0.5

-0.5 2.0

YIN, CIN, CVBSIN
INPUTS ONLY

MAX9508

Video Filter Amplifier with SmartSleep and

Bidirectional Video Support

_______________________________________________________________________________________

7

Typical Operating Characteristics (continued)

(VDD= SHDN = +3.3V, V

SMARTSLEEP

= V

INT/EXT

= GND = 0V. RL = 150Ω to GND. TA= +25°C, unless otherwise noted.)

DIFFERENTIAL GAIN AND PHASE

0.3

0.2

0.1
0

-0.1

GAIN (%)

DIFFERENTIAL

-0.2

-0.3

0.8

0.4

0

-0.4

PHASE (deg)

DIFFERENTIAL

-0.8
176

STEP

NTC-7 VIDEO TEST

SIGNAL ON CVBS OUTPUTS

5432176

5432

MAX9508 toc13

CVBSIN
500mV/div

12.5T RESPONSE

400ns/div

PAL COLOR BARS

MAX9508 toc10

2T RESPONSE

100ns/div

PAL MULTIBURST RESPONSE

MAX9508 toc11

MAX9508 toc14

V

IN

200mV/div

V

OUT

400mV/div

CVBSIN
500mV/div

MAX9508 toc12

MAX9508 toc15

Y

IN

200mV/div

Y

OUT

400mV/div

CVBSIN
500mV/div

10µs/div

FIELD SQUARE-WAVE RESPONSE

2ms/div

MAX9508 toc16

CVBSOUT1
1V/div

CVBSIN
500mV/div

CVBSOUT1
1V/div

ENABLE TIME

INPUT VOLTAGE = 1V

10µs/div

2µs/div

MAX9508 toc17

CVBSOUT1
1V/div

OUTPUT
1V/div

SHDN
1V/div

DISABLE TIME

INPUT VOLTAGE = 1V

200ns/div

10µs/div

MAX9508 toc18

CVBSOUT1
1V/div

OUTPUT
1V/div

SHDN
1V/div

MAX9508

Video Filter Amplifier with SmartSleep and
Bidirectional Video Support

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VDD= SHDN = +3.3V, V

SMARTSLEEP

= V

INT/EXT

= GND = 0V. RL = 150Ω to GND. TA= +25°C, unless otherwise noted.)

PULLDOWN RESISTANCE

DISTRIBUTION

PROBABILITY

PULLDOWN RESISTANCE (Ω)

PROBABILITY

MAX9508 toc19

5.55.04.0 4.52.0 2.5 3.0 3.51.51.0 6.0

FREQUENCY RESPONSE

AT 27MHz DISTRIBUTION

PULLDOWN RESISTANCE

vs. TEMPERATURE

7.0

6.5

6.0

5.5

5.0

4.5

4.0

3.5

PULLDOWN RESISTANCE (Ω)

3.0

2.5

2.0

-50 125
TEMPERATURE (°C)

MAX9508 toc22

1007525 500-25

0

-20

-40

-60

CROSSTALK (dB)

-80

FREQUENCY RESPONSE

AT 6.75MHz DISTRIBUTION

MAX9508 toc20

PROBABILITY

ATTENUATION (dB)

INPUT-TO-INPUT CROSSTALK

vs. FREQUENCY

MAX9508 toc21

-0.1-0.2-0.3-0.4-0.5-0.6 0

MAX9508 toc23

-100

ATTENUATION (dB)

OUTPUT-TO-OUTPUT CROSSTALK

vs. FREQUENCY

0

-20

-40

-60

CROSSTALK (dB)

-80

-100

-120
100k 100M

FREQUENCY (Hz)

10M1M

-34-36-40 -38-48 -46 -44 -42-50-52 -32

MAX9508 toc24

-120
100k 100M

FREQUENCY (Hz)

OUTPUT IMPEDANCE

vs. FREQUENCY

100

10

1

OUTPUT IMPEDANCE (Ω)

0.1
100k 100M

1M 10M

FREQUENCY (Hz)

10M1M

MAX9508 toc25