HPA00351DRCR - TEXAS INSTRUMENTS

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August 2009

FMS6690 • Rev. 1.0.3

FMS6690 — Six Channel, 6

Order, SD/SP/HD Video Filter Driver

FMS6690

Six Channel, 6th Order, SD/PS/HD Video Filter Driver

Features

 Three Selectable Sixth-Order 15/32MHz (PS/HD)

Filters

 Three Fixed Sixth-Order 8MHz (SD) Filters with

MUXed Input

 Transparent Input Clamping

 Single Video Load Drive (2VPP, 150Ω, AV= 6dB)

 AC-or DC-Coupled Inputs

 AC-or DC-Coupled Outputs

 DC-Coupled Outputs Eliminate AC-Coupling

Capacitors

 Low Power

 5V Only

Applications

 Cable and Satellite Set-Top Boxes

 DVD Players

 HDTV

 Personal Video Recorders (PVR)

 Video On Demand (VOD)

Description

The FMS6690 Low-Cost Video Filter (LCVF) is intended

to replace passive LC filters and drivers with a low-cost

integrated device. Six 6th-order Butterworth filters

provide improved image quality compared to typical

passive solutions. The combination of low-power

Standard Definition (SD), Progressive Scan (PS), and

High Definition (HD) filters greatly simplifies DVD video

output circuitry. Three channels offer fixed SD filters

and feature an additional MUXed input, while the other

three channels are selectable between PS and HD

filters. The FMS6690 offers a fixed gain of 6dB.

The FMS6690 may be directly driven by a DC-coupled

DAC output or an AC-coupled signal. Internal diode

clamps and bias circuitry may be used if AC-coupled

inputs are required (see Applications section for

details).

The outputs can drive AC-or DC-coupled single (150Ω)

video loads. DC-coupling the outputs removes the need

for output coupling capacitors. The input DC levels are

offset approximately +280mV at the output.

Ordering Information

Part Number Operating

Temperature

Range

Eco

Status Package Packing

Method

FMS6690MTC20X 0° to 70°C RoHS 20-Lead Thin Shrink Outline Package (TSSOP) 2500 Units in

Tape and Reel

For Fairchild’s defini t i on of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.

FMS6690 • Rev. 1.0.3 2

FMS6690 — Six Channel, 6

Order, SD/PS/HD Video Filter Driver

Block Diagram

Figure 1. Block Diagram

FMS6690 • Rev. 1.0.3 3

FMS6690 — Six Channel, 6

Order, SD/PS/HD Video Filter Driver

Pin Configuration

Figure 2. Pin Configuration

Pin Definitions

Pin # Name Type Description

1 SD IN1 Input SD Video Input, Channel 1

2 SD IN2 Input SD Video Input, Channel 2

3 SD IN3A Input SD Video Input, Channel 3A

4 SD IN3B Input SD Video Input, Channel 3B

5 VCC Input +5V Supply

6 FcSEL Input Selects Filter Corner Rrequency for Pins 7, 8, and 9; “0” = PS, “1” = HD

7 PS/HD IN1 Input Selectable PS or HD Video Input, Channel 1

8 PS/HD IN2 Input Selectable PS or HD Video Input, Channel 2

9 PS/HD IN3 Input Selectable PS or HD Video Input, Channel 3

10 N/C Input No Connect

11 N/C Input No Connect

12 PS/HD OUT3 Output Filtered PS or HD Video Output, Channel 3

13 PS/HD OUT2 Output Filtered PS or HD Video Output, Channel 2

14 PS/HD OUT1 Output Filtered PS or HD Video Output, Channel 1

15 MUXSEL Input MUX Selects Between Channel 3A and 3B Inputs; 0 = A, 1 = B

16 GND Input Must Be Tied to Ground

17 GND Input Must Be Tied to Ground

18 SD OUT3 Output Filtered SD Video Output, Channel 3

19 SD OUT2 Output Filtered SD Video Output, Channel 2

20 SD OUT1 Output Filtered SD Video Output, Channel 1

FMS6690 • Rev. 1.0.3 4

FMS6690 — Six Channel, 6

Order, SD/PS/HD Video Filter Driver

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be

operable above the recommended operating conditions and stressing the parts to these levels is not recommended.

In addition, extended exposure to stresses above the recommended operating conditions may affect device

reliability. The absolute maximum ratings are stress ratings only.

Symbol Parameter Min. Max. Unit

VCC DC Supply Voltage -0.3 6.0 V

VIO Analog Digital I/O -0.3 VCC + 0.3 V

IOUT Output Current, Any One Channel, Do Not Exceed 50 mA

Human Body Model, JESD22-A114 9

ESD Electrostatic Discharge

Capability Charged Device Model, JESD22-C101 2 kV

Reliability Information

Symbol Parameter Min. Typ. Max. Unit

TJ Junction Temperature +150 °C

TSTG Storage Temperature Range -65 +150 °C

TL Lead Temperature, Soldering 10 Seconds +300 °C

ΘJA Thermal Resistance, JEDEC Standard, Multi-Layer Test Board,

Still Air 74 °C/W

Recommended Operating Conditions

The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended

operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not

recommend exceeding them or designing to Absolute Maximum Ratings.

Symbol Parameter Min. Typ. Max. Unit

TA Operating Temperature Range 0 +70 °C

VCC Supply Voltage Range 4.75 5.00 5.25 V

DC Electrical Characteristics

Unless otherwise noted, TA=25°C, VCC=5V, AC coupled with 0.1µF, all outputs AC coupled with 220µF into 150Ω

loads, referenced to 400kHz.

Symbol Parameter Conditions Min. Typ. Max. Units

ICC Supply Current(1) No Load 60 80 mA

VIN Video Input Voltage Range Referenced to GND if DC Coupled 1.4 VPP

VIL Digital Input Low(1) F

cSEL 0 0.8 V

VIH Digital Input High(1) F

cSEL 2.4 VCC V

Note:

1. 100% tested at 25°C.

FMS6690 • Rev. 1.0.3 5

FMS6690 — Six Channel, 6

Order, SD/PS/HD Video Filter Driver

Standard-Definition Electrical Characteristics

Unless otherwise noted, TA=25°C, VIN=1VPP, VCC=5V, all inputs AC coupled with 0.1µF, all outputs AC coupled with

220µF into 150Ω loads, referenced to 400kHz.

Symbol Parameter Conditions Min. Typ. Max. Units

AVSD Channel Gain(2) All SD Channels 5.6 6.0 6.4 dB

f1dBSD -1dB Flatness(2) All SD Channels 5.20 7.15 MHz

fcSD -3dB Bandwidth(2) All SD Channels 6.5 8.0 MHz

fSBSD Attenuation (Stopband Reject)(2) All SD Channels at f=27MHz 43 50 dB

DG Differential Gain All SD Channels 0.7 %

DP Differential Phase All SD Channels 1.0 °

THD Distortion, Output VOUT=1.4VPP, 3.58MHz 0.35 %

XTALKSD Crosstalk (Ch-to-Ch) at 1MHz -54 dB

SNR Signal-to-Noise Ratio(3) NTC-7 Weighting, 100kHz to 4.2MHz 72 dB

tpdSD Propagation Delay Delay from Input to Output, 4.5MHz 90 ns

Notes:

2. 100% tested at 25°C.

3. SNR=20 • log (714mV / rms noise).

Progressive Scan Electrical Characteristics

Unless otherwise noted, TA=25°C, VIN=1VPP, VCC=3.3V, RSOURCE=37.5Ω, all inputs AC coupled with 0.1µF, all outputs

AC coupled with 220µF into 150Ω loads, referenced to 400kHz.

Symbol Parameter Conditions Min. Typ. Max. Units

AVPS Channel Gain(4) All PS Channels 5.6 6.0 6.4 dB

f1dBSD -1dB Flatness(4) All PS Channels 12 14 MHz

fcPS -3dB Bandwidth(4) All PS Channels 13 16 MHz

fSBSD Attenuation (Stopband Reject)(4) All PS Channels at f=54MHz 37 45 dB

THD Total Harmonic Distortion,

Output (All PS Channels) VOUT=1.4VPP, 7MHz 0.35 %

XTALKPS Crosstalk (Ch-to-Ch) at 1MHz -53 dB

SNR Signal-to-Noise Ratio(5) Unweighted, 100kHz to 15MHz 66 dB

tpdSD Propagation Delay Delay from Input to Output 47 ns

Notes:

4. 100% tested at 25°C.

5. SNR=20 • log (714mV / rms noise).

High-Definition Electrical Characteristics

Unless otherwise noted, TA=25°C, VIN=1VPP, VCC=5V, RSOURCE=37.5Ω, all inputs AC coupled with 0.1µF, all outputs

AC coupled with 220µF into 150Ω loads, referenced to 400kHz.

Symbol Parameter Conditions Min. Typ. Max. Units

AVHD Channel Gain(6) All HD Channels 5.6 6.0 6.4 dB

f1dBHD -1dB Flatness(6) All HD Channels 28 31 MHz

fcHD -3dB Bandwidth(6) All HD Channels 30 34 MHz

fSBHD Attenuation (Stopband Reject)(6) All HD Channels at f=74.25MHz 30 41 dB

THD Output Distortion,(All PS Channels) VOUT=1.4VPP, 22MHz 0.9 %

XTALKHD Crosstalk (Ch-to-Ch) at 1MHz -54 dB

SNR Signal-to-Noise Ratio(7) Unweighted, 100kHz to 30MHz 60 dB

tpdHD Propagation Delay Delay from Input to Output 25 ns

Notes:

6. 100% tested at 25°C.

7. SNR=20 • log (714mV / rms noise).

FMS6690 • Rev. 1.0.3 6

FMS6690 — Six Channel, 6

Order, SD/PS/HD Video Filter Driver

Typical Performance Characteristics

Unless otherwise noted TC=25°C, VIN=1VPP, VCC=5V, RSOURCE=37.5, inputs AC coupled with 0.1µF, all outputs AC

coupled with 220µF into150 loads.

Figure 3. SD Gain vs. Frequency Figure 4. SD Flatness vs. Frequency

Figure 5. PS Gain vs. Frequency Figure 6. PS Flatness vs. Frequency

Figure 7. HD Gain vs. Frequency Figure 8. HD Flatness vs. Frequency

FMS6690 • Rev. 1.0.3 7

FMS6690 — Six Channel, 6

Order, SD/PS/HD Video Filter Driver

Typical Performance Characteristics

Unless otherwise noted TC=25°C, VIN=1VPP, VCC=5V, RSOURCE=37.5, inputs AC coupled with 0.1µF, all outputs AC

coupled with 220µF into150 loads.

Figure 9. SD Group Delay vs. Frequency Figure 10. Noise vs. Frequency

Figure 11. PS Group Delay vs. Frequency Figure 12. SD Differential Gain

Figure 13. HD Group Delay vs. Frequency

FMS6690 • Rev. 1.0.3 8

FMS6690 — Six Channel, 6

Order, SD/PS/HD Video Filter Driver

Applications Information

Functional Description

The FMS6690 Low-Cost Video Filter (LCVF) provides

6dB gain (9dB optional, contact factory for further

information) from input to output. In addition, the input is

slightly offset to optimize the output driver performance.

The offset is held to the minimum required value to

decrease the standing DC current into the load. Typical

voltage levels are shown in Figure 14.

Figure 14. Typical Voltage Levels

The FMS6690 provides an internal diode clamp to

support AC-coupled input signals. If the input signal

does not go below ground, the input clamp does not

operate. This allows DAC outputs to directly drive the

FMS6690 without an AC coupling capacitor. The worst-

case sync tip compression, due to the clamp, does not

exceed 7mV. The input level set by the clamp,

combined with the internal DC offset, keeps the output

within acceptable range. When the input is AC-coupled,

the diode clamp sets the sync tip (or lowest voltage) just

below ground.

For symmetric signals like C, U, V, Cb, Cr, Pb, and Pr;

the average DC bias is fairly constant and the inputs

can be AC-coupled with the addition of a pull-up resistor

to set the DC input voltage. DAC outputs can also drive

these same signals without the AC coupling capacitor.

A conceptual illustration of the input clamp circuit is

shown in Figure 15.

YOUT

800k

Driver

YIN

0.65V

Figure 15. Input Clamp Circuit

I/O Configurations

For DC-coupled DAC drive with DC-coupled outputs,

use the configuration in Figure 16.

DVD or

STB

So C

DAC

Out put

75Ω

LCVF

Cl am p

Inactive

0V - 1.4V

Figure 16. DC-Coupled Inputs and Outputs

Alternatively, if the DAC’s average DC output level

causes the signal to exceed the range of 0V to 1.4V, it

can be AC-coupled, as shown in Figure 17.

DVD or

STB

So C

DAC

Out pu t

75Ω

LCVF

Cl am p

Act ive

0.1µ

0V - 1.4V

Figure 17. AC-Coupled Inputs, DC-coupled Outputs

When the FMS6690 is driven by an unknown external

source or a SCART with its own clamping circuitry, the

inputs should be AC-coupled, shown in Figure 18.

75Ω

LCVF

Cl am p

Act ive

75Ω

0.1µ

Ex t e r n al Vi d e o

source must

be AC-coupled.

0V - 1.4V

Figure 18. SCART with DC-Coupled Outputs

FMS6690 • Rev. 1.0.3 9

FMS6690 — Six Channel, 6

Order, SD/PS/HD Video Filter Driver

The same method can be used for biased signals with

the addition of a pull-up resistor to make sure the clamp

never operates. The internal pull-down resistance is

800kΩ ±20%, so the external resistance should be

7.5MΩ to set the DC level to 500mV. If a pull-up

resistance of less than 7.5MΩ desired, add an external

pull-down such that the DC input level is set to 500mV.

75Ω

LCVF

Bi as

Input

75Ω

0.1µ

Ex t er n al Vi d eo

sour ce m ust

be AC-coupled.

500mV +/ -350mV

7.5MΩ

Figure 19. Biased SCART with DC-Coupled Outputs

The same circuits can be used with AC-coupled outputs

if desired.

DVD or

STB

So C

DAC

Out p ut

75Ω

LCVF

Cl am p

Inactive

0V - 1.4V 220µ

Figure 20. DC-Coupled Inputs, AC-coupled Outputs

75Ω

LCVF

Cl am p

Acti ve

75Ω

0.1µ

Ex t er n al v i d e o

source must

be AC-coupled.

220µ

500mV +/ -350mV

7.5MΩ

Figure 21. Biased SCART with AC-Coupled Outputs

Note:

8. The video tilt or line time distortion is dominated by

the AC-coupling capacitor. The value may need to

be increased beyond 220µF to obtain satisfactory

operation in some applications.

Power Dissipation

The FMS6690 output drive configuration must be

considered when calculating overall power dissipation.

Care must be taken not to exceed the maximum die

junction temperature. The following example can be

used to calculate the FMS6690’s power dissipation and

internal temperature rise.

TJ= TA+ Pd• ΘJA (1)

where Pd= PCH1+ PCH2+ PCHx,

and PCHx= VS • ICH- (VO2/RL) (2)

where:

VO = 2VIN+ 0.280V;

ICH = (ICC/ 6) + (VO/RL);

VIN= RMS value of input signal;

ICC = 60mA;

VS= 5V; and

RL= channel load resistance.

Board layout affects thermal characteristics. Refer to

the Layout Considerations section for more information.

Output Considerations

The FMS6690 outputs are DC offset from the input by

150mV therefore, VOUT = 2•VIN DC+150mv. This offset

is required to obtain optimal performance from the

output driver and is held at the minimum value to

decrease the standing DC current into the load. Since

the FMS6690 has a 2x (6dB) gain, the output is typically

connected via a 75-series back-matching resistor

followed by the 75 video cable. Because of the

inherent divide by two of this configuration, the blanking

level at the load of the video signal is always less then

1V. When AC-coupling the output, ensure that the

coupling capacitor of choice passes the lowest

frequency content in the video signal and that line time

distortion (video tilt) is kept as low as possible.

The selection of the coupling capacitor is a function of

the subsequent circuit input impedance and the leakage

current of the input being driven. To obtain the highest-

quality output video signal, the series termination

resistor must be placed as close to the device output

pin as possible. This greatly reduces the parasitic

capacitance and inductance effect on the FMS6690

output driver. The distance from device pin to place

series termination resistor should be no greater than 0.1

inches.

Figure 22. Distance from Device Pin to Series

Termination Resistor

FMS6690 • Rev. 1.0.3 10

FMS6690 — Six Channel, 6

Order, SD/PS/HD Video Filter Driver

Layout Considerations

Layout and supply bypassing play major roles in high-

frequency performance and thermal characteristics.

Fairchild offers a demonstration board,

FMS6690DEMO, to use as a guide for layout and to aid

in device testing and characterization. The

FMS6690DEMO is a four-layer board with a full power

and ground plane. Following this layout configuration

provides the optimum performance and thermal

characteristics. For optimum results, follow these steps

as a basis for high-frequency layout:

 Include 10µF and 0.1F ceramic bypass

capacitors.

 Place the 10F capacitor within 0.75 inches of the

power pin.

 Place the 0.1F capacitor within 0.1 inches of the

power pin.

 For multi-layer boards, use a large ground plane to

help dissipate heat.

 For 2 layer boards, use a ground plane that

extends beyond the device by at least 0.5.

 Minimize all trace lengths to reduce series

inductances.

FMS6690 • Rev. 1.0.3 11

FMS6690 — Six Channel, 6

Order, SD/PS/HD Video Filter Driver

Typical Application

Figure 23. Typical Application Diagram

FMS6690 • Rev. 1.0.3 12

FMS6690 — Six Channel, 6

Order, SD/PS/HD Video Filter Driver

Physical Dimensions

Figure 24. 20-Lead Thin Shrink Outline Package (TSSOP)

Pack age drawings are provided as a servic e t o customers c onsidering Fairchild components. Drawi ngs may change in any manner

without notice. P l ease note the revision and/or date on the drawing and contac t a Fairchild Semic onductor representat i ve to verify

or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically

the warranty therein, which covers Fairchild products.

Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:

http://www.fairchildsemi.com/packaging/.

FMS6690 • Rev. 1.0.3 13

FMS6690 — Six Channel, 6

Order, SD/PS/HD Video Filter Driver

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coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.

ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability

arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.

Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,

regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or

specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer

application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not

designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification

in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized

application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and

expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such

claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This

literature is subject to all applicable copyright laws and is not for resale in any manner.

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