Datasheet

ManualsBrandsFAIRCHILD SEMICONDUCTOR ManualsLinear ICsLinear IC - Video editing Driver TSSOP 20

August 2009

FMS6690 • Rev. 1.0.3

FMS6690 — Six Channel, 6

Order, SD/SP/HD Video Filter Driver

FMS6690

Six Channel, 6

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 (2V

, 150Ω, A

= 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 6

-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 definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.

Summary of content (13 pages)

PAGE 1
FMS6690 Six Channel, 6th Order, SD/PS/HD Video Filter Driver Features Description Three Selectable Sixth-Order 15/32MHz (PS/HD) Filters Three Fixed Sixth-Order 8MHz (SD) Filters with MUXed Input Transparent Input Clamping The FMS6690 Low-Cost Video Filter (LCVF) is intended to replace passive LC filters and drivers with a low-cost th integrated device. Six 6 -order Butterworth filters provide improved image quality compared to typical passive solutions.
PAGE 2
Figure 1. Block Diagram © 2006 Fairchild Semiconductor Corporation FMS6690 • Rev. 1.0.3 FMS6690 — Six Channel, 6th Order, SD/PS/HD Video Filter Driver Block Diagram www.fairchildsemi.
PAGE 3
FMS6690 — Six Channel, 6th Order, SD/PS/HD Video Filter Driver Pin Configuration Figure 2.
PAGE 4
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 V VCC DC Supply Voltage -0.3 6.0 -0.3 VCC + 0.
PAGE 5
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 AVSD f1dBSD Parameter Channel Gain Conditions (2) -1dB Flatness (2) (2) Min. Typ. All SD Channels 5.6 6.0 Max. Units 6.4 dB All SD Channels 5.20 7.15 MHz All SD Channels 6.5 8.0 MHz All SD Channels at f=27MHz 43 50 dB 0.
PAGE 6
Unless otherwise noted TC=25°C, VIN=1VPP, VCC=5V, RSOURCE=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 © 2006 Fairchild Semiconductor Corporation FMS6690 • Rev. 1.0.
PAGE 7
Unless otherwise noted TC=25°C, VIN=1VPP, VCC=5V, RSOURCE=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 FMS6690 — Six Channel, 6th Order, SD/PS/HD Video Filter Driver Typical Performance Characteristics Figure 13. HD Group Delay vs. Frequency © 2006 Fairchild Semiconductor Corporation FMS6690 • Rev. 1.0.3 www.
PAGE 8
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. 0.65 V YIN Driver YOUT 800kΩ Figure 15.
PAGE 9
External Video source must be AC-coupled. 75Ω 7.5MΩ 0.1µ LCVF Bias Input TJ= TA+ Pd• ΘJA (1) where Pd= PCH1+ PCH2+ PCHx, 2 and PCHx= VS • ICH- (VO /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. 75Ω Board layout affects thermal characteristics. Refer to the Layout Considerations section for more information.
PAGE 10
Layout and supply bypassing play major roles in highfrequency 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.
PAGE 11
FMS6690 — Six Channel, 6th Order, SD/PS/HD Video Filter Driver Typical Application Figure 23. Typical Application Diagram © 2006 Fairchild Semiconductor Corporation FMS6690 • Rev. 1.0.3 www.fairchildsemi.
PAGE 12
FMS6690 — Six Channel, 6th Order, SD/PS/HD Video Filter Driver 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.
PAGE 13
FMS6690 — Six Channel, 6th Order, SD/PS/HD Video Filter Driver © 2006 Fairchild Semiconductor Corporation FMS6690 • Rev. 1.0.3 www.fairchildsemi.