MAXIM MAX11504, MAX11505 User Manual

General Description

The MAX11504/MAX11505 integrated filters offer four
channels of 5th order filters for standard-definition video
and include +6dB output buffers on each channel. These
video filters are ideal for anti-aliasing and DAC smooth­ing in applications such as set-top boxes, security sys­tems, digital video recorders (DVRs), DVD players, and
personal video recorders.

The MAX11504/MAX11505 video inputs feature a trans­parent clamp compatible with AC- and DC-coupled
input signals and allow DAC outputs to be directly cou­pled. The 5th order filters provide a bandwidth of

8.6MHz (typical). The MAX11504 offers a flat passband
response on all channels. The MAX11505 offers a 0.8dB
peaking passband response on Channel 1, resulting in
a bandwidth of 8.9MHz (typical) and a flat passband
response on all other channels.

Each channel includes an output buffer with a gain of
+6dB capable of driving a full 2V

P-P

video signal into two
standard 150Ω (75Ω back terminated) video loads. The
buffers drive either AC- or DC-coupled loads and assure
a blanking level below 1V after the back-match resistor.

The MAX11504/MAX11505 operate from a single +5V
supply and are available in the 0°C to +70°C commer­cial temperature range. These devices are available in
small 10-pin µMAX

®

packages.

Applications

Set-Top Box Receivers
Digital Video Recorders (DVRs)
Security Video Systems
SDTV
DVD Players
Personal Video Recorders
Video On-Demand

Features

♦ Four-Channel 5th Order Filter for Standard-

Definition Video

♦ +6dB Output Buffers

♦ Transparent Input Clamp

♦ AC- or DC-Coupled Inputs

♦ AC- or DC-Coupled Outputs

♦ Output Buffers Can Drive Two Standard 150Ω

Video Loads

♦ 12kV HBM ESD Protection on Outputs

♦ Flat Passband Response (MAX11504)

♦ 0.8dB Peaking Passband Response on Channel 1

(MAX11505)

♦ Single +5V Power Supply

♦ Small 10-Pin µMAX Package

MAX11504/MAX11505

Four-Channel, Standard-Definition

Video Filters

________________________________________________________________

Maxim Integrated Products

1

19-1057; Rev 0; 11/07

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

EVALUATION KIT

AVAILABLE

Ordering Information

Note: All devices are specified over the 0°C to +70°C commer­cial temperature range.

Simplified Block Diagram

+6dB

+6dB

+6dB

IN1

IN2

IN3

OUT1

OUT2

OUT3

GND

8.6MHz

8.6MHz

8.9MHz*

TRANSPARENT

CLAMP

TRANSPARENT

CLAMP

TRANSPARENT

CLAMP

TRANSPARENT

CLAMP

8.6MHz

+6dB

IN4

OUT4

8.6MHz

*MAX11505 WITH 0.8dB PEAKING ON CHANNEL 1

V

CC

MAX11504
MAX11505

Pin Configuration

µMAX is a registered trademark of Maxim Integrated Products, Inc.

PART

M A X1 1 5 0 4 C U B+ 10 µMAX U10+2 Flat

M A X1 1 5 0 5 C U B+ 10 µMAX U10+2

PIN­PACKAGE

PACKAGE

CODE

FREQUENCY

RESPONSE

HF Boost On

Channel 1

TOP VIEW

1

IN1

2

IN2

3

IN3

4

5

CC

MAX11504
MAX11505

µMAX

10

OUT1

9

OUT2

8

OUT3

7

OUT4IN4

GNDV

6

MAX11504/MAX11505

Four-Channel, Standard-Definition
Video Filters

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +5V, R

LOAD

= 150Ω to GND, CIN= 0.1µF, TA= 0°C to +70°C. All frequency response is relative to 100kHz.)

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.

VCCto GND ..............................................................-0.3V to +6V

All other pins to GND ..-0.3V to the lower of (V

CC

+ 0.3V) and +6V

Continuous Power Dissipation (T

A

= +70°C)

10-Pin µMAX (derate 8.8mW/°C above +70°C) ........707.3mW

Maximum Current into Any Pin except V

CC

and GND......±50mA

Operating Temperature Range

MAX1150_CUB ...................................................0°C to +70°C

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

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

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

)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT

-1dB Bandwidth f

-3dB Bandwidth f

Stopband Attenuation A

Low-Frequency Gain A

Low-Frequency Gain Matching A

Input Voltage Range V

Differential Gain dG All channels 0.1 %

Differential Phase dφ All channels 0.3 degrees

Total Harmonic Distortion THD V

Channel-to-Channel Crosstalk X

S i g nal - to- N oi se Rati o SNR NTC-7 weighting, 100kHz, 4.2MHz 80 dB

Propagation Delay t

Power-Supply Rejection Ratio PSRR DC (all channels) 70 dB

Supply-Voltage Range V

Supply Current I

1dB

3dB

V(MATCH

TALK

pd

CC

CC

MAX11504 4.5 7.2

MAX11505, Channel 1 5.0 7.8

MAX11504 8.6

MAX11505, Channel 1 8.9

f = 27MHz 50 dB

SB

V

Referenced to GND if DC-coupled 1.4 V

IN

= 1.8V

OUT

f = 1MHz -70 dB

f = 4.5MHz 76 ns

No load 24 35 mA

5.5 6.0 6.5 dB

0.02 dB

, f = 1MHz (All channels) 0.1 %

P-P

4.75 5 5.25 V

MHz

MHz

MAX11504/MAX11505

Four-Channel, Standard-Definition

Video Filters

_______________________________________________________________________________________

3

Typical Operating Characteristics

(VCC= 5V, RL= 150Ω to GND, TA= +25°C)

MAX11504 12.5T RESPONSE

MAX11504toc07

400ns/div

IN

OUT

MAX11504 MULTIBURST RESPONSE

MAX11504toc08

10µs/div

IN

OUT

MAX11504 FREQUENCY RESPONSE

10

0

-10

-20

-30

RESPONSE (dB)

-40

-50

-60

-70

0.1 100
FREQUENCY (MHz)

101

MAX11504 DIFFERENTIAL GAIN, NTSC

0.2

0.1

0

DIFFERENTIAL GAIN (%)

-0.1

-0.2
16754

32

STEP

10

MAX11504toc01

5

0

RESPONSE (dB)

-5

-10

0.1 10

MAX11504 DIFFERENTIAL PHASE, NTSC

0.4

0.3

MAX11504toc04

0.2

0.1

0

-0.1

DIFFERENTIAL PHASE (deg)

-0.2

-0.3

-0.4
1675432

MAX11504 PASSBAND RESPONSE

1

FREQUENCY (MHz)

STEP

MAX11504toc02

MAX11504toc05

MAX11504 GROUP DELAY

vs. FREQUENCY

120

100

80

60

DELAY (ns)

40

20

0

0.1 10 100

1

FREQUENCY (MHz)

MAX11504 2T RESPONSE

200ns/div

MAX11504toc03

MAX11504toc06

IN

OUT

MAX11504/MAX11505

Four-Channel, Standard-Definition
Video Filters

4 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= 5V, RL= 150Ω to GND, TA= +25°C)

MAX11505 FREQUENCY RESPONSE

MAX11504toc09

FREQUENCY (MHz)

RESPONSE (dB)

-30

-50

-10

10

-40

-60

-20

0

-70

0.1 100101

MAX11505 PASSBAND RESPONSE

MAX11504toc10

FREQUENCY (MHz)

RESPONSE (dB)

0

-5

5

10

-10

0.1 101

MAX11505 GROUP DELAY

vs. FREQUENCY

MAX11504toc11

FREQUENCY (MHz)

DELAY (ns)

60

40

100

20

80

120

0

0.1 1 10010

MAX11505 DIFFERENTIAL GAIN, NTSC

MAX11504toc12

DIFFERENTIAL GAIN (%)

0

-0.1

0.1

0.2

-0.2
1675432

STEP

MAX11505 DIFFERENTIAL PHASE, NTSC

MAX11504toc13

DIFFERENTIAL PHASE (deg)

0

-0.2

0.2

0.4

-0.4

0.1

-0.1

0.2

-0.3

1675432

STEP

MAX11505 2T RESPONSE

MAX11504toc14

200ns/div

IN

OUT

MAX11505 12.5T RESPONSE

MAX11504toc15

400ns/div

IN

OUT

MAX11505 MULTIBURST RESPONSE

MAX11504toc16

10µs/div

IN

OUT

Detailed Description

Each channel of the MAX11504/MAX11505 contains a
transparent input clamp, a 5th order lowpass filter, and
an output amplifier with +6dB gain (see the

Functional

Diagrams and Typical Operating Circuits

). The 5th order
lowpass filters provide a bandwidth of 8.6MHz (typical).
The MAX11504 provides a flat passband response. The
MAX11505 features a 0.8dB high-frequency boost on

Channel 1 to help with system rolloff (for CVBS signals)
and a flat passband response on all other channels.
Within the passband, each channel amplifies the signal
by two and adds 280mV of offset.

Typical voltage levels are shown in Figures 1 and 2.

MAX11504/MAX11505

Four-Channel, Standard-Definition

Video Filters

_______________________________________________________________________________________ 5

Pin Description

Figure 1. Typical AC-Coupled Signal

PIN NAME FUNCTION

1 IN1 Video Input Channel 1. The MAX11505 provides 0.8dB passband boost at high frequency.

2 IN2 Video Input Channel 2

3 IN3 Video Input Channel 3

4 IN4 Video Input Channel 4

5VCCPower Supply. Bypass to ground with 0.1µF and 1µF capacitors.

6 GND Ground

7 OUT4 Video Output Channel 4

8 OUT3 Video Output Channel 3

9 OUT2 Video Output Channel 2

10 OUT1 Video Output Channel 1. The MAX11505 provides 0.8dB passband boost at high frequency.

VVV

=× +().2028

OUT IN

1.00V

INPUT SIGNAL

0.30V

0V

MAX11504
MAX11505

IN_ OUT_

2.28V

OUTPUT SIGNAL

0.88V

0.28V

MAX11504/MAX11505

Transparent Clamps

All inputs feature transparent clamps that allow either
AC or DC input coupling. The clamp remains inactive
while the input signal is above ground, offering true DC
input coupling. If the signal goes below ground, as
occurs when it is AC-coupled, the clamp sets the sync
tip slightly below the ground level.

Input Coupling

The choice of AC- or DC-coupling the input depends
on the video source. Many DACs provide a current
output and are terminated to ground with a resistor;
such signals are conveniently DC-coupled. Use AC­coupling when the DC level of the video signal is
unknown or outside the specified input range of the
MAX11504/MAX11505, such as SCART or VCC-termi­nated DAC outputs.

DC-Coupled Inputs

If the input is DC-coupled, the input voltage must
remain above zero but not exceed the maximum input
voltage of 1.4V (typical).

AC-Coupled Inputs

If the input is AC-coupled, the transparent clamps are
active and set the lowest point of the signal at ground.
This is appropriate for unipolar signals such as Y, R, G,
or B with or without sync pulse (Figure 3).

Four-Channel, Standard-Definition
Video Filters

6 _______________________________________________________________________________________

Figure 2. Typical DC-Coupled Signal

Figure 3. Simple AC-Coupling for Unipolar Signals (Y, R, G, B)

2.32V

1.02V

INPUT SIGNAL

0.32V

0.02V
0V

MAX11504
MAX11505

IN_ OUT_

OUTPUT SIGNAL

0.92V

0.32V

ENCODER

DAC

0.1µF

MAX11504
MAX11505

IN_

MAX11504/MAX11505

Four-Channel, Standard-Definition

Video Filters

_______________________________________________________________________________________ 7

For bipolar signals such as C, Pb, and Pr, bias the AC­coupled inputs to a fixed DC voltage, typically 0.59V, to
ensure that the transparent clamp remains off. A suit­able network is shown in Figure 4. Determine the bias
voltage using:

where IL = the input leakage current (typically 0.5µA).

Standard-Definition Filters

The MAX11504/MAX11505 filters are optimized to deliv­er a flat passband along with high stopband attenua­tion. The filter characteristic has been chosen to provide
an excellent time domain response with low overshoot.
The typical -3dB frequency of 8.6MHz guarantees mini­mal attenuation in the passband while at the same time
offering a 27MHz attenuation of typically -50dB.
Channel 1 of the MAX11505 has 0.8dB of high-frequency
boost and a -3dB frequency of 8.9MHz.

Output Buffer

The MAX11504/MAX11505 feature output buffers with
+6dB gain that drive two standard 150Ω video loads.
A typical load (Figure 5a) is a 75Ω back-match

resistor, an optional 220µF or larger coupling
capacitor, and a 75Ω termination resistor. The
MAX11504/MAX11505 clamp the signal, forcing the
blanking level to less than 1V at the termination resis­tor. This allows driving video loads to meet digital TV
specifications without the need for costly AC-coupling
capacitors. When driving two parallel loads per output
(Figure 5b), thermal considerations must be taken into
account, especially for DC-coupled outputs (see the

Junction Temperature Calculations

section.)

Figure 4. AC-Coupling for Bipolar Signals (C, Pb, Pr)

Figure 5. Typical Output Loads

R

=

RR

12

2

+

− ×

VIR

1( )

V

BCCL

V

CC

ENCODER

DAC

R1

820kΩ

0.1µF

R2
120kΩ

MAX11504
MAX11505

IN_

MAX11504
MAX11505

OUT_

75Ω

(a)

220µF

(OPTIONAL)

75Ω

MAX11504
MAX11505

OUT_

75Ω

75Ω

(b)

220µF

(OPTIONAL)

220µF

(OPTIONAL)

75Ω

75Ω

MAX11504/MAX11505

Four-Channel, Standard-Definition
Video Filters

8 _______________________________________________________________________________________

Applications Information

Output Configuration

The MAX11504/MAX11505 outputs may be either DC­or AC-coupled. If AC-coupled, choose a capacitor that
passes the lowest frequency content of the video signal,
and keep the line-time distortion within desired limits. The
capacitor value is a function of the input leakage and
impedance of the circuit being driven. Common industry
practice is to use a 220µF or larger coupling capacitor. If
any or all outputs are driving two parallel loads, see the

Junction Temperature Calculations

section.

The MAX11504/MAX11505 outputs are fully protected
against short circuits either to the ground or the positive
supply of the device. The short-circuit protection cir­cuitry limits the output current to 80mA (typical) per out­put. Shorting more than one output simultaneously can
exceed the maximum package power dissipation.

Junction Temperature Calculations

Die temperature is a function of quiescent power dissi­pation and the power dissipation in the output drivers.
Calculate the power dissipated PDusing:

where PDSis the quiescent power dissipated in the die,
and given by:

and where P

DOn

is the power dissipated in the nthdri-

ver stage and given by:

where V

ORMSn

is the RMS output voltage and RLis the

load resistance.

Example - Assuming these conditions:

1) Video standard = 525/60/2:1.

2) Video format = RGB with syncs on all channels.

3) Picture content = 100% white.

4) The input signal is AC-coupled.

5) The output signal is DC-coupled.

6) VCC= 5.0V.

7) ICC= 24mA.

A sync tip exists at 280mV and peak white exists at

2.28V. The RMS voltage will be approximately 1.88V on
each output (80% of the peak-peak voltage, plus the
offset) giving:

and

The junction temperature is given by:

where T

J

= junction temperature, TA= ambient temper-

ature (assume +70°C) and R

θJA

= thermal resistance

junction to ambient.

From the

Absolute Maximum Ratings

section of the
data sheet, the derating factor is 8.8mW/°C above
+70°C. R

θJA

= 1/(derating factor) = 1/(8.8mW/°C) =

113°C/W.

Therefore:

If there is only one video load on each output, the junc­tion temperature lowers to:

The above calculations assume the use of a multilay­ered board with extensive ground planes for high ther­mal efficiency. Using such a board is especially
important in applications where there are two video
loads on each channel.

PPPPPP

=++++

DDSDODODODO

1234

PV I

=×

DS CC CC

PW

=× =5 0 024 0 12..

DS

− ×

(.).

PW

DOn

PW

=++++=0 12 0 078 0 078 0 078 0 078 0 432......

D

5 1 88 1 88

=

TT R P

J A JA D

TC

=+ × =+°70 113 0 432 119.

J

75

=+ ×()

=

.

0 078

θ

VV V

− ×()

P

DOn

CC ORMSn ORMSn

=

R

L

TC

=+ °101

J

MAX11504/MAX11505

Four-Channel, Standard-Definition

Video Filters

_______________________________________________________________________________________ 9

PCB Layout Recommendations

To help with heat dissipation, connect the power and
ground traces to large copper areas. Bypass VCCto
GND with a 0.1µF capacitor and 1.0µF capacitors.
Surface-mount capacitors are recommended for their
low inductance. Place traces carrying video signals
appropriately to avoid mutual coupling. If inputs are
AC-coupled, place the capacitors as close as possible
to the device and keep the traces short to minimize
parasitic capacitance and inductance.

MAX11504/MAX11505

Four-Channel, Standard-Definition
Video Filters

10 ______________________________________________________________________________________

Functional Diagrams and Typical Operating Circuits

+6dB

+6dB

+6dB

75Ω

GND

8.6MHz

8.6MHz

8.9MHz

✝

CLAMP

CLAMP

CLAMP

CLAMP

8.6MHz

+6dB

8.6MHz

MAX11504
MAX11505

0.1µF*

DAC

ENCODER

75Ω

75Ω

0.1µF*

DAC

75Ω

0.1µF*

DAC

75Ω

0.1µF*

DAC

IN1

IN2

IN3

IN4

1

2

3

4

5

4

V

CC

8

7

6

6

OUT1

*OPTIONAL
✝MAX11505 WITH 0.8dB PEAKING ON CHANNEL 1

RECONSTRUCTION FILTER APPLICATION

OUT2

OUT3

OUT4

220µF*

75Ω

75Ω

220µF*

75Ω

75Ω

220µF*

75Ω

75Ω

220µF*

75Ω

1µF0.1µF

+5V

MAX11504/MAX11505

Four-Channel, Standard-Definition

Video Filters

______________________________________________________________________________________ 11

Functional Diagrams and Typical Operating Circuits (continued)

+6dB

+6dB

+6dB

75Ω

GND

8.6MHz

8.6MHz

8.9MHz

✝

CLAMP

CLAMP

CLAMP

CLAMP

8.6MHz

+6dB

8.6MHz

MAX11504
MAX11505

0.1µF*

ADC

MULTICHANNEL

DECODER

75Ω

75Ω

0.1µF*

ADC

75Ω

0.1µF*

ADC

75Ω

0.1µF*

ADC

IN1

IN2

IN3

IN4

1

2

3

3

5

4

V

CC

8

7

6

6

OUT1

*OPTIONAL
✝MAX11505 WITH 0.8dB PEAKING ON CHANNEL 1

OUT2

OUT3

OUT4

75Ω

75Ω

75Ω

75Ω

75Ω

75Ω

75Ω

1µF0.1µF

+5V

ANTI-ALIASING FILTER APPLICATION

Chip Information

PROCESS: BiCMOS

MAX11504/MAX11505

Four-Channel, Standard-Definition
Video Filters

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

12

____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages

.)

e

10

Ø0.50±0.1

0.6±0.1

1

0.6±0.1

4X S

H

TOP VIEW

D2

A2

b

D1

A

A1

FRONT VIEW

GAGE PLANE

α

BOTTOM VIEW

SIDE VIEW

10

DIM

A1
A2 0.030 0.037 0.75 0.95
D1
D2
E1
E2
H
L
L1

1

b
e

c

S

α

E2

E1

L

L1

INCHES

MAX

MIN

0.043

-A

0.006

0.002

0.120

0.116

0.118

0.114

0.116

0.120

0.118

0.114

0.187

0.0157

0.007

0.0035

c

0.199

0.0275

0.037 REF

0.0106

0.0197 BSC

0.0078

0.0196 REF
6°

0° 0° 6°

MILLIMETERS

-

1.10

0.15

3.05

3.00

3.05

3.00

5.05

0.70

0.940 REF

0.270

0.500 BSC

0.200

0.498 REF

MAX

MIN

0.05

2.95

2.89

2.95

2.89

4.75

0.40

0.177

0.090

10LUMAX.EPS

PROPRIETARY INFORMATION

TITLE:

PACKAGE OUTLINE, 10L uMAX/uSOP

REV.DOCUMENT CONTROL NO.APPROVAL

21-0061

1

1