FMS6690MTC20X_技术文档

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August 2009

FMS6690

Six Channel, 6^thOrder, SD/PS/HD Video Filter Driver

Features

Description

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

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

integrated device. Six 6^th-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.

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 (2V_PP, 150Ω, A_V= 6dB)

AC-or DC-Coupled Inputs

AC-or DC-Coupled Outputs

DC-Coupled Outputs Eliminate AC-Coupling

Capacitors

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).

Low Power

5V Only

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.

Applications

Cable and Satellite Set-Top Boxes

DVD Players

HDTV

Personal Video Recorders (PVR)

Video On Demand (VOD)

Ordering Information

Operating

Part Number Temperature

Range

Packing

Eco

Status

Package

Method

2500 Units in

Tape and Reel

FMS6690MTC20X

0° to 70°C

RoHS 20-Lead Thin Shrink Outline Package (TSSOP)

For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.

FMS6690 • Rev. 1.0.3

www.fairchildsemi.com

Block Diagram

Figure 1. Block Diagram

FMS6690 • Rev. 1.0.3

www.fairchildsemi.com

2

Pin Configuration

Figure 2. Pin Configuration

Pin Definitions

Pin #

1

Name

SD IN1

Type Description

Input

SD Video Input, Channel 1

2

SD IN2

SD Video Input, Channel 2

3

SD IN3A

SD IN3B

VCC

SD Video Input, Channel 3A

4

SD Video Input, Channel 3B

5

+5V Supply

6

FcSEL

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

Selectable PS or HD Video Input, Channel 1

Selectable PS or HD Video Input, Channel 2

Selectable PS or HD Video Input, Channel 3

No Connect

7

PS/HD IN1

PS/HD IN2

PS/HD IN3

N/C

8

9

10

11

12

13

14

15

16

17

18

19

20

N/C

No Connect

PS/HD OUT3

PS/HD OUT2

PS/HD OUT1

MUX_SEL

Output Filtered PS or HD Video Output, Channel 3

Output Filtered PS or HD Video Output, Channel 2

Output Filtered PS or HD Video Output, Channel 1

Input

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

Must Be Tied to Ground

GND

Must Be Tied to Ground

SD OUT3

SD OUT2

SD OUT1

Output Filtered SD Video Output, Channel 3

Output Filtered SD Video Output, Channel 2

Output Filtered SD Video Output, Channel 1

FMS6690 • Rev. 1.0.3

www.fairchildsemi.com

3

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

V_CC

Parameter

Min.

-0.3

Max.

Unit

V

DC Supply Voltage

Analog Digital I/O

6.0

V_IO

V_CC+ 0.3

V

I_OUT

Output Current, Any One Channel, Do Not Exceed

50

9

mA

Human Body Model, JESD22-A114

Electrostatic Discharge

Capability

ESD

kV

Charged Device Model, JESD22-C101

2

Reliability Information

Symbol

Parameter

Min.

Typ.

Max.

Unit

T_J

T_STG

T_L

Junction Temperature

+150

+300

°C

Storage Temperature Range

-65

Lead Temperature, Soldering 10 Seconds

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

Still Air

74

°C/W

Θ_JA

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

T_A

Parameter

Operating Temperature Range

Supply Voltage Range

Min.

0

Typ.

Max.

+70

Unit

°C

V_CC

4.75

5.00

5.25

V

DC Electrical Characteristics

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

loads, referenced to 400kHz.

Symbol

I_CC

Parameter

Supply Current⁽¹⁾

Conditions

Min.

Typ.

60

Max.

Units

mA

V_PP

V

No Load

80

V_IN

Video Input Voltage Range Referenced to GND if DC Coupled

1.4

V_IL

Digital Input Low⁽¹⁾

Digital Input High⁽¹⁾

F_cSEL

0

0.8

V_IH

2.4

V_CC

V

Note:

1. 100% tested at 25°C.

FMS6690 • Rev. 1.0.3

www.fairchildsemi.com

4

Standard-Definition Electrical Characteristics

Unless otherwise noted, T_A=25°C, V_IN=1V_PP, V_CC=5V, all inputs AC coupled with 0.1µF, all outputs AC coupled with

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

Symbol

AV_SD

f_1dBSD

f_cSD

Parameter

Channel Gain⁽²⁾

-1dB Flatness⁽²⁾

-3dB Bandwidth⁽²⁾

Attenuation (Stopband Reject)⁽²⁾All SD Channels at f=27MHz

Conditions

All SD Channels

Min. Typ. Max. Units

5.6

5.20

6.5

43

6.0

7.15

8.0

50

6.4

dB

MHz

dB

%

All SD Channels

f_SBSD

DG

Differential Gain

All SD Channels

0.7

1.0

0.35

-54

72

DP

Differential Phase

Distortion, Output

Crosstalk (Ch-to-Ch)

Signal-to-Noise Ratio⁽³⁾

Propagation Delay

All SD Channels

°

THD

V_OUT=1.4V_PP, 3.58MHz

at 1MHz

%

X_TALKSD

SNR

dB

ns

NTC-7 Weighting, 100kHz to 4.2MHz

Delay from Input to Output, 4.5MHz

t_pdSD

90

Notes:

2. 100% tested at 25°C.

3. SNR=20 • log (714mV / rms noise).

Progressive Scan Electrical Characteristics

Unless otherwise noted, T_A=25°C, V_IN=1V_PP, V_CC=3.3V, R_SOURCE=37.5Ω, all inputs AC coupled with 0.1µF, all outputs

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

Symbol

AV_PS

f_1dBSD

f_cPS

Parameter

Channel Gain⁽⁴⁾

-1dB Flatness⁽⁴⁾

-3dB Bandwidth⁽⁴⁾

Attenuation (Stopband Reject)⁽⁴⁾All PS Channels at f=54MHz

Conditions

All PS Channels

Min. Typ. Max. Units

5.6

12

13

37

6.0

14

16

45

6.4

dB

MHz

dB

All PS Channels

f_SBSD

Total Harmonic Distortion,

V_OUT=1.4V_PP, 7MHz

THD

0.35

%

Output (All PS Channels)

X_TALKPS

SNR

Crosstalk (Ch-to-Ch)

Signal-to-Noise Ratio⁽⁵⁾

Propagation Delay

at 1MHz

-53

66

dB

ns

Unweighted, 100kHz to 15MHz

Delay from Input to Output

t_pdSD

47

Notes:

4. 100% tested at 25°C.

5. SNR=20 • log (714mV / rms noise).

High-Definition Electrical Characteristics

Unless otherwise noted, T_A=25°C, V_IN=1V_PP, V_CC=5V, R_SOURCE=37.5Ω, all inputs AC coupled with 0.1µF, all outputs

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

Symbol

AV_HD

Parameter

Channel Gain⁽⁶⁾

-1dB Flatness⁽⁶⁾

-3dB Bandwidth⁽⁶⁾

Attenuation (Stopband Reject)⁽⁶⁾

Conditions

All HD Channels

Min. Typ. Max. Units

5.6

28

30

6.0

31

6.4

dB

MHz

dB

f_1dBHD

f_cHD

All HD Channels

34

f_SBHD

All HD Channels at f=74.25MHz

41

THD

Output Distortion,(All PS Channels) V_OUT=1.4V_PP, 22MHz

0.9

-54

60

%

X_TALKHD

SNR

Crosstalk (Ch-to-Ch)

Signal-to-Noise Ratio⁽⁷⁾

Propagation Delay

at 1MHz

dB

Unweighted, 100kHz to 30MHz

Delay from Input to Output

dB

t_pdHD

25

ns

Notes:

6. 100% tested at 25°C.

7. SNR=20 • log (714mV / rms noise).

FMS6690 • Rev. 1.0.3

www.fairchildsemi.com

5

Typical Performance Characteristics

Unless otherwise noted T_C=25°C, V_IN=1V_PP, V_CC=5V, R_SOURCE=37.5Ω, inputs AC coupled with 0.1µF, all outputs AC

coupled with 220µF into150Ω 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

www.fairchildsemi.com

6

Typical Performance Characteristics

Unless otherwise noted T_C=25°C, V_IN=1V_PP, V_CC=5V, R_SOURCE=37.5Ω, inputs AC coupled with 0.1µF, all outputs AC

coupled with 220µF into150Ω 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

www.fairchildsemi.com

7

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.

0.65V

Y

Driver

IN

Y

OUT

800kΩ

Figure 15. Input Clamp Circuit

I/O Configurations

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

use the configuration in Figure 16.

0V- 1.4V

DVD or

STB

So C

LCVF

Clamp

Inactive

75Ω

DAC

Output

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.

0V- 1.4V

0.1µ

DVD or

STB

SoC

LCVF

Clamp

Active

75Ω

DAC

Output

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.

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.

0V- 1.4V

0.1µ

LCVF

75Ω

Ext ern al Vi d eo

Cl amp

source must

Active

beAC-coupled.

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.

75Ω

Figure 18. SCART with DC-Coupled Outputs

FMS6690 • Rev. 1.0.3

www.fairchildsemi.com

8

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.

(1)

(2)

T_J= T_A+ P_d• Θ_JA

where P_d= P_CH1+ P_CH2+ P_CHx

and P_CHx= V_S• I_CH- (V_O²/R_L)

,

where:

V_O= 2V_IN+ 0.280V;

I

_CH= (I_CC/ 6) + (V_O/R_L);

V_IN= RMS value of input signal;

_CC= 60mA;

I

Ext ern al Vi d eo

V_S= 5V; and

R_L= channel load resistance.

source must

be AC-coupled.

7.5MΩ

0.1µ

LCVF

Bi as

75Ω

Board layout affects thermal characteristics. Refer to

the Layout Considerations section for more information.

Input

75Ω

500mV+/-350mV

Output Considerations

The FMS6690 outputs are DC offset from the input by

150mV therefore, V_OUT= 2•V_INDC+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 75ꢀ-series back-matching resistor

followed by the 75ꢀ 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.

Figure 19. Biased SCART with DC-Coupled Outputs

The same circuits can be used with AC-coupled outputs

if desired.

0V- 1.4V

220µ

DVD or

STB

SoC

DAC

Output

LCVF

Clamp

Inactive

75Ω

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 20. DC-Coupled Inputs, AC-coupled Outputs

Ext er nal vi d eo

sourcemust

beAC-coupled.

7.5MΩ

0.1µ

220µ

LCVF

Clamp

Active

75Ω

500mV+/-350mV

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.

Figure 22. Distance from Device Pin to Series

Termination Resistor

FMS6690 • Rev. 1.0.3

www.fairchildsemi.com

9

Layout Considerations

Layout and supply bypassing play major roles in high-

frequency performance and thermal characteristics.

Include 10µF and 0.1μF ceramic bypass

capacitors.

Fairchild

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

in device testing and characterization. The

offers

a

demonstration

board,

Place the 10μF capacitor within 0.75 inches of the

power pin.

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:

Place the 0.1μF 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

www.fairchildsemi.com

10

Typical Application

Figure 23. Typical Application Diagram

FMS6690 • Rev. 1.0.3

www.fairchildsemi.com

11

Physical Dimensions

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

Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner

without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative 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

www.fairchildsemi.com

12

FMS6690 • Rev. 1.0.3

www.fairchildsemi.com

13

ON Semiconductor and

are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.

ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent

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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型号：	FMS6690MTC20X
厂家：	ONSEMI
描述：	六通道6阶SD/PS/HD的视频滤波器驱动器驱动光电二极管商用集成电路驱动器
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