MAXIM MAX11506, MAX11507 Technical data

General Description

The MAX11506/MAX11507 integrated filters offer six
channels, three for standard-definition (SD) video and
three for either SD or high-definition (HD) 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, digital video
recorders, DVD players, and personal video recorders.

The MAX11506/MAX11507 video inputs feature a trans­parent clamp compatible with AC- and DC-coupled input
signals and allow DAC outputs to be directly coupled. The
filters provide -3dB bandwidth of 9.0MHz for the SD filters
and 33MHz for the HD filters. Each channel includes an
output buffer with a gain of +6dB capable of driving a full
2V

P-P

video signal into a 150Ω video load. The buffers
drive either AC- or DC-coupled loads and assure a blank­ing level of below 1V after the backmatch resistor. DC­coupling eliminates bulky coupling capacitors.

The MAX11506 offers a flat passband while the
MAX11507 features 0.8dB peaking on the three SD-only
channels to compensate for system roll-off. The
MAX11506/MAX11507 operate from a single +5V supply
and are available in the 0°C to +70°C commercial tem­perature grade. The MAX11506/MAX11507 are offered in
the 16-pin QSOP package.

Applications

Cable and Satellite Set-Top Box Receivers
HDTVs
DVD Players
Personal Video Recorders
Digital Video Recorders (DVRs)
SDTVs
Video On-Demand
HD Recorders

Features

♦ Three Selectable 6th-Order 9MHz/33MHz

(SD/HD) Filters

♦ Three Fixed 5th-Order 9MHz (SD) Filters
♦ +6dB Output Buffers
♦ Transparent Input Clamp
♦ AC- or DC-Coupled Inputs
♦ AC- or DC-Coupled Outputs
♦ 0.8dB Peaking Passband Response

(MAX11507) on Three SD-Only Channels

♦ Output Buffers Drive a Standard 150Ω Video

Load

♦ Single +5V Power Supply
♦ Lead-Free 16-Pin QSOP Package

MAX11506/MAX11507

Low-Cost, 6-Channel SD Plus HD/SD

Selectable Video Filters and Buffers

________________________________________________________________

Maxim Integrated Products

1

Pin Configuration

19-4122; Rev 0; 4/08

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

Typical Operating Circuit appears at end of data sheet.

Ordering Information

+

Denotes a lead-free package.

PART

TEMP RANGE

PIN-

FREQUENCY

RESPONSE

MAX11506CEE+

Flat

MAX11507CEE+

High

Frequency

Boost

SD/HDOUT1

SD/HDIN1

SD/HDOUT2

SD/HDIN2

SD/HDOUT3

SD/HDIN3

SDOUT1SDIN1

SDOUT2SDIN2

SDOUT3SDIN3

FSEL

TRANSPARENT

CLAMP

TRANSPARENT

CLAMP

TRANSPARENT

CLAMP

TRANSPARENT

CLAMP

TRANSPARENT

CLAMP

TRANSPARENT

CLAMP

9MHz, 5TH ORDER

9MHz/33MHz, 6TH ORDER

MAX11506
MAX11507

6dB

6dB

6dB

6dB

6dB

6dB

Block Diagram

PACKAGE

0°C to +70°C 16 QSOP

0°C to +70°C 16 QSOP

TOP VIEW

SDIN1

SDIN2

SDIN3

SD/HDIN1

SD/HDIN2

SD/HDIN3

+

1

2

3

MAX11506

4

V

CC

5

6

7

8

MAX11507

QSOP

FSEL

16

SDOUT1

15

SDOUT2

14

SDOUT3

13

GND

12

GND

SD/HDOUT1

11

10

SD/HDOUT2

9

SD/HDOUT3

MAX11506/MAX11507

Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= +5V, R

LOAD

= 150Ω to GND, CIN= 0.1µF, TA= 0°C to +70°C, unless otherwise noted.)

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)

16-Pin QSOP (derate 9.6mW/°C above +70°C)....... 771.5mW

Maximum Current into Any Pin except V

CC

and GND .....±50mA

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

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

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

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

AC ELECTRICAL CHARACTERISTICS

(VCC= +5V, R

LOAD

= 150Ω to GND, CIN= 0.1µF, TA= 0°C to +70°C, frequency response relative to 100kHz, unless otherwise

noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Current I

Supply Voltage Range V

Input-Voltage Range V

Digital Input High Voltage V

Digital Input Low Voltage V

CC

CC

IN

IH

IL

4.75 5.00 5.25 V

2.0 V

40 61 mA

1.4 V

0.8 V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

STANDARD-DEFINITION VIDEO

-1dB Bandwidth f

-3dB Bandwidth f

Stopband Attenuation A

Low-Frequency Gain A

Differential Gain dG All channels 0.5 %

Differential Phase dφ All channels 0.2 Degrees

Total Harmonic Distortion THD V

Channel-to-Channel Crosstalk X

Signal-to-Noise Ratio SNR Peak signal (2V

Propagation Delay t

Power-Supply Rejection Ratio PSRR DC (all channels) 45 dB

MAX11506, SD 4.5 7.9

1dB

3dB

TALK

PD

MAX11506, SD/HD in SD mode 4.5 7.9

MAX11507, SD 5.0 8.6

MAX11507, SD/HD in SD mode 4.5 7.9

9.0 MHz

f = 27MHz 48 dB

SB

No load 5.8 6.0 6.2 dB

V

= 1.4V

OUT

f = 1MHz -60 dB

f = 4.5MHz 59 ns

, f = 1MHz (all channels) 0.1 %

P-P

) to RMS noise, 100kHz, 4.2MHz 71 dB

P-P

MHz

MAX11506/MAX11507

Low-Cost, 6-Channel SD Plus HD/SD

Selectable Video Filters and Buffers

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5V, R

LOAD

= 150Ω to GND, CIN= 0.1µF, TA= 0°C to +70°C, frequency response relative to 100kHz, unless otherwise

noted.)

Typical Operating Characteristics

(VCC= 5V, RL= 150Ω to GND, output DC-coupled, TA= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

HIGH-DEFINITION VIDEO

-1dB Bandwidth f

-3dB Bandwidth f

Stopband Attenuation A

Low-Frequency Gain A

Total Harmonic Distortion THD

Channel-to-Channel Crosstalk X

Signal-to-Noise Ratio SNR Peak signal (2V

Group-Delay Deviation ∆t

1dB

3dB

TA = +25°C 23 30 MHz

f = 37.125MHz 4.0

f = 44.250MHz 13

SB

f = 74.250MHz, TA = +25°C 32.0 46.0

V

V

TALK

g

= 1.4V

OUT

V

= 1.4V

OUT

V

= 1.4V

OUT

f = 1MHz -60 dB

f = 100kHz to 26MHz 15 ns

, f = 10MHz 0.4

P-P

, f = 15MHz 0.4

P-P

, f = 22MHz 0.6

P-P

) to RMS noise, 100kHz, 30MHz 65 dB

P-P

33 MHz

dB

5.8 6.0 6.2 dB

%

MAX11506 FREQUENCY RESPONSE

MAX11506 PASSBAND RESPONSE

SD CHANNEL

10

0

-10

-20

-30

-40

NORMALIZED GAIN (dB)

-50

-60

-70

0.1 100
FREQUENCY (MHz)

101

MAX11506 toc01

4

2

0

-2

-4

NORMALIZED GAIN (dB)

-6

NORMALIZED TO ZERO AT 100kHz

-8

0.1 10

SD CHANNEL

1

FREQUENCY (MHz)

10

MAX11506 toc02

0

-10

-20

-30

-40

NORMALIZED GAIN (dB)

-50

-60

-70

MAX11507 FREQUENCY RESPONSE

0.1 100

SD CHANNEL

FREQUENCY (MHz)

MAX11506 toc03

101

MAX11506/MAX11507

Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers

4 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= 5V, RL= 150Ω to GND, output DC-coupled, TA= +25°C.)

MAX11507 PASSBAND RESPONSE

SD CHANNEL

4

2

0

-2

-4

NORMALIZED GAIN (dB)

-6

NORMALIZED TO ZERO AT 100kHz

-8

0.1 10

1

FREQUENCY (MHz)

10

MAX11506 toc04

0

-10

-20

-30

-40

NORMALIZED GAIN (dB)

-50

-60

-70

0.1 100

FREQUENCY RESPONSE

-10

-20

-30

-40

NORMALIZED GAIN (dB)

-50

-60

-70

SD/HD CHANNEL IN HD MODE

10

0

0.1 100
FREQUENCY (MHz)

101

4

MAX11506 toc07

2

0

-2

-4

NORMALIZED GAIN (dB)

-6

-8

NORMALIZED TO ZERO AT 100kHz

0.1 10 100

FREQUENCY RESPONSE

SD/HD CHANNEL IN SD MODE

101

FREQUENCY (MHz)

PASSBAND RESPONSE

SD/HD CHANNEL IN HD MODE

1

FREQUENCY (MHz)

4

MAX11506 toc05

MAX11506 toc08

2

0

-2

-4

NORMALIZED GAIN (dB)

-6

-8

120

100

80

60

DELAY (ns)

40

20

0

PASSBAND RESPONSE

SD/HD CHANNEL IN SD MODE

NORMALIZED TO ZERO AT 100kHz

0.1 10

1

FREQUENCY (MHz)

GROUP DELAY vs. FREQUENCY

SD CHANNEL

0.1 10 100

1

FREQUENCY (MHz)

MAX11506 toc06

MAX11506 toc09

GROUP DELAY vs. FREQUENCY

SD/HD CHANNEL IN SD MODE

100

90

80

70

60

50

DELAY (ns)

40

30

20

10

0

0.1 10 100

1

FREQUENCY (MHz)

MAX11506 toc10

GROUP DELAY vs. FREQUENCY

SD/HD CHANNEL IN HD MODE

40

35

30

25

20

DELAY (ns)

15

10

5

0

0.1 10 100

1

FREQUENCY (MHz)

1.0

MAX11506 toc11

-0.1

-0.2

-0.3

-0.4

DIFFERENTIAL GAIN (%)

-0.5

-0.6

-0.7

DIFFERENTIAL GAIN, NTSC

SD CHANNEL

0

2

134567

MAX11506 toc12

STEP

MAX11506/MAX11507

Low-Cost, 6-Channel SD Plus HD/SD

Selectable Video Filters and Buffers

_______________________________________________________________________________________

5

Typical Operating Characteristics (continued)

(VCC= 5V, RL= 150Ω to GND, output DC-coupled, TA= +25°C.)

DIFFERENTIAL PHASE, NTSC

SD CHANNEL

0.4

0.3

0.2

0.1

DIFFERENTIAL PHASE (deg)

0

-1.0
2

134657

STEP

2T RESPONSE

SD CHANNEL

0.7

0.6

MAX11506 toc13

0.5

0.4

0.3

0.2

DIFFERENTIAL GAIN (%)

0.1

-1.0

MAX11506 toc16

DIFFERENTIAL GAIN, NTSC

SD/HD CHANNEL IN SD MODE

0

2

134567

INPUT

STEP

DIFFERENTIAL PHASE, NTSC
SD/HD CHANNEL IN SD MODE

0.4

MAX11506 toc14

0.3

0.2

0.1

DIFFERENTIAL PHASE (deg)

0

-1.0
2

134657

2T RESPONSE

SD/HD CHANNEL IN SD MODE

MAX11506 toc17

MAX11506 toc15

STEP

INPUT

200ns/div

OUTPUT

200ns/div

OUTPUT

MAX11506/MAX11507

Detailed Description

The MAX11506/MAX11507 integrated filters offer 6 chan­nels, 3 for SD video and 3 for either SD or HD video and
include +6dB output buffers on each channel. Each
channel of the MAX11506/MAX11507 contains a trans­parent input clamp, a 9.0MHz 5th-order lowpass filter
and an output amplifier with a gain of 2V/V (see the

Typical Operating Circuit

). The MAX11506 provides a flat

passband response and the MAX11507 provides a

0.8dB high-frequency boost at 5MHz on all SD-only
channels to help with system roll-off. The SD-only chan­nels add 280mV of offset at the output.

Three channels, SD/HD1, SD/HD2, and SD/HD3 include
selectable SD and HD video filters, each with a trans­parent input clamp, a 6th-order lowpass filter with a -3dB
bandwidth of 9.0MHz (SD) and 33MHz (HD), and an
output amplifier with a gain of 2V/V. The SD/HD chan­nels add 550mV of offset at the output.

The output voltage equations are:

V

SDOUT

= (2 x VIN) + 0.28V

V

SD/HDOUT

= (2 x VIN) + 0.55V

Typical voltage waveforms are shown in Figures 1 and 2.

Inputs

Transparent Clamps

All inputs feature transparent clamps to allow either AC­or DC-coupling of the inputs. The clamp remains inac­tive while the input signal is above ground, offering true
DC input coupling. When the signal goes below
ground, as is the case when it is AC-coupled, the
clamp sets the sync tip close to the ground level.

Input Coupling

The choice of AC- or DC-coupling the input depends
on the video source. Many DACs have a current output
and are terminated to ground with a resistor; such sig­nals are conveniently DC-coupled. Use AC-coupling
when the DC level of the video signal is unknown or
outside the specified input range of the MAX11506/
MAX11507, such as SCART or VCC-terminated DAC
outputs.

DC-Coupled Inputs

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

Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers

6 _______________________________________________________________________________________

Pin Description

PIN NAME FUNCTION

1 SDIN1 SD Video Input Channel 1

2 SDIN2 SD Video Input Channel 2

3 SDIN3 SD Video Input Channel 3

4VCCPower-Supply Input

5 FSEL

6 SD/HDIN1 SD/HD Video Input Channel 1

7 SD/HDIN2 SD/HD Video Input Channel 2

8 SD/HDIN3 SD/HD Video Input Channel 3

9 SD/HDOUT3 SD/HD Video Output Channel 3

10 SD/HDOUT2 SD/HD Video Output Channel 2

11 SD/HDOUT1 SD/HD Video Output Channel 1

12, 13 GND Ground

14 SDOUT3 SD Video Output Channel 3

15 SDOUT2 SD Video Output Channel 2

16 SDOUT1 SD Video Output Channel 1

Frequency-Select Input. SD/HD select for channels 4, 5, and 6. Force FSEL high to select HD, and
low to select SD. Do not leave unconnected.

MAX11506/MAX11507

Low-Cost, 6-Channel SD Plus HD/SD

Selectable Video Filters and Buffers

_______________________________________________________________________________________ 7

Figure 1. Typical AC-Coupled Signal

INPUT SIGNAL

0.32V

1.02V

0.02V

0.00V

OUTPUT SIGNAL

1.19V HD

0.98V SD

2.59V HD

2.32V SD

0.59V HD

0.32V SD

INPUT OUTPUT

MAX11506
MAX11507

Figure 2. Typical DC-Coupled Signal

1.0V

INPUT SIGNAL

0.3V

0.0V

MAX11506
MAX11507

INPUT OUTPUT

2.55V HD

2.28V SD

1.15V HD

0.88V SD

0.55V HD

0.28V SD

OUTPUT SIGNAL

MAX11506/MAX11507

Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers

8 _______________________________________________________________________________________

AC-Coupled Inputs

When 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 CVBS, Y,
R, G, or B, with or without sync pulses (Figure 3).

For bipolar signals such as Pb and Pr, bias the AC-cou­pled inputs to a fixed DC voltage, typically 0.59V, to
ensure that the transparent clamp remains off. Figure 4
shows a typical network. Determine the bias voltage using:

where ILis the input leakage current (typically 0.5µA).

SD Filters

The MAX11506/MAX11507 filters are optimized to deliv­er a flat (MAX11506) or high-frequency boosted
(MAX11507) passband and high stopband attenuation.
The filter characteristic provides excellent time domain
response with low overshoot. The typical -3dB frequen­cy of 9.0MHz guarantee minimal attenuation in the
passband, while at the same time offering a 27MHz
attenuation of typically -48dB.

HD Filters

The internal filters deliver a flat passband along with high
stopband attenuation. The filter characteristic provides
an excellent time domain response with low overshoot.
The typical -3dB frequency of 33MHz guarantees low
attenuation in the passband, while at the same time
allowing for a typical attenuation of -46dB at 74.25MHz.

Output Buffers

The MAX11506/MAX11507 feature output buffers with
+6dB gain that drive a standard 150Ω video load. A
typical load consists of a 75Ω backmatch resistor, an
optional 220µF or larger coupling capacitor, and a 75Ω
termination resistor. The offset between input and out­put signals ensures that the blanking level on the output
is less than 1V after the backmatch resistor, thus meet­ing digital TV specifications allowing the devices to
drive video loads directly without using costly AC-coupling
capacitors.

Applications Information

Output Considerations

The MAX11506/MAX11507 outputs may be DC- or AC­coupled. These devices, with +6dB gain, are typically
connected to a 75Ω series backmatch resistor followed
by the video cable. Choose an AC-coupling capacitor
value that ensures that the lowest frequency content in
the video signal is passed and the field-time distortion
is kept within desired limits when using an AC connec­tion. The selection of this value is a function of the input
impedance, and more importantly, the input leakage of
the circuit being driven. Common industry practice is to
use a 220µF or larger capacitor.

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

INPUT

R1
820kΩ

R2
120kΩ

MAX11506
MAX11507

0.1µF

ENCODER

DAC

V

CC

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

R

V

BAVCCL

2

RR

+

12

xV I xR

()

()=

−

1

ENCODER

DAC

0.1µF

MAX11506
MAX11507

INPUT

MAX11506/MAX11507

Low-Cost, 6-Channel SD Plus HD/SD

Selectable Video Filters and Buffers

_______________________________________________________________________________________ 9

The MAX11506/MAX11507 outputs are fully protected
against short circuits to ground. The short-circuit pro­tection circuitry limits the output current to 75mA (typi­cal) per output. Shorting more than one output to
ground simultaneously may exceed the maximum
package power dissipation.

PCB Layout Recommendations

Connect the power and ground traces to large copper
areas to enhance power dissipation. Bypass VCCto
GND with 0.1µF and 1.0µF capacitors. Place the 0.1µF
capacitor closest to VCC. Use surface-mount capacitors

for their low inductance. Place traces carrying video
signals appropriately to avoid mutual coupling. When
inputs are AC-coupled, place the capacitors as close
as possible to the device and keep traces short to mini­mize parasitic capacitance and inductance. Refer to
the MAX11506/MAX11507 evaluation kit datasheet for
PCB layout.

Chip Information

PROCESS: BiCMOS

VIDEO

SoC

Y1

OUT

C

OUT

CV

OUT

G/Y2

OUT

B/Pb

OUT

R/Pr

OUT

SD/HDOUT1SD/HDIN1

SD/HDOUT2SD/HDIN2

SD/HDOUT3SD/HDIN3

SDOUT1SDIN1

SDOUT2SDIN2

SDOUT3SDIN3

V

CC

GND

5V

10µF

0.1µF

FSEL

220µF

75Ω

75Ω

75Ω VIDEO

CABLE

DAC LOAD

RESISTORS

AC-COUPLING

CAPACITORS OPTIONAL

*THE MAX11507 FEATURES 0.8dB PEAKING PASSBAND RESPONSE ON THE 3 SD-ONLY CHANNELS.

MAX11506
MAX11507*

220µF

75Ω

75Ω

220µF

75Ω

75Ω

220µF

75Ω

75Ω

220µF

75Ω

75Ω

220µF

75Ω

75Ω

Typical Operating Circuit

MAX11506/MAX11507

Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers

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.

10

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© 2008 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

PACKAGE TYPE PACKAGE CODE DOCUMENT NO.

16 QSOP E16+1

21-0055

Package Information

For the latest package outline information, go to www.maxim-ic.com/packages.