FMS6246 Fairchild Semiconductor, FMS6246 Datasheet

no-image

FMS6246

Manufacturer Part Number
FMS6246
Description
6th Order SD/PS Video Filter Driver
Manufacturer
Fairchild Semiconductor
Datasheet
©2004 Fairchild Semiconductor Corporation
FMS6246 Rev. 1A
FMS6246
Six Channel, 6
Features
■ Three selectable sixth-order 8/15MHz (SD/PS) filters
■ Three fixed sixth-order 8MHz (SD) filters
■ Transparent input clamping
■ Single video load drive (2Vpp, 150Ω, A
■ AC or DC-coupled inputs
■ AC or DC-coupled outputs
■ DC-coupled outputs eliminate AC-coupling capacitors
■ Low Power
■ 5V only
■ Robust (12kV HBM) output ESD protection
■ Lead (Pb) Free packages- TSSOP-20
Applications
■ Cable and Satellite set top boxes
■ DVD players
■ HDTV
■ Personal Video Recorders (PVR)
■ Video On Demand (VOD)
Block Diagram
SD/PS IN1
SD/PS IN2
SD/PS IN3
th
SD IN1
SD IN2
SD IN3
Order SD/PS Video Filter Driver
F cSEL SD / PS
V
= 6dB)
Transparent Clamp
Transparent Clamp
Transparent Clamp
Transparent Clamp
Transparent Clamp
Transparent Clamp
www.DataSheet4U.com
1
8MHz, 6 th order
Description
The FMS6246 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) and Progressive Scan
(PS) filters greatly simplify DVD video output circuitry. Three
channels offer fixed SD filters while the other three are select-
able between SD and PS filters.
The FMS6246 offers a fixed gain of 6dB. A metal option is avail-
able that provides a fixed gain of 9dB, offering even more flexi-
bility.
The FMS6246 may be directly driven by a DC-coupled DAC out-
put or an AC-coupled signal. Internal diode clamps and bias cir-
cuitry 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 will be offset approxi-
mately +280mV at the output.
Selectable
8/15 MHz
6 th order
6d
6d
6d
6d
6d
6d
B
B
B
B
B
B
SD OUT1
SD OUT2
SD OUT3
SD/PS OUT1
SD/PS OUT2
SD/PS OUT3
www.fairchildsemi.com
July 2005

Related parts for FMS6246

FMS6246 Summary of contents

Page 1

... DVD video output circuitry. Three channels offer fixed SD filters while the other three are select- able between SD and PS filters. The FMS6246 offers a fixed gain of 6dB. A metal option is avail- able that provides a fixed gain of 9dB, offering even more flexi- bility. ...

Page 2

... N FAIRCHILD Vcc 5 16 FMS6246 6 15 FcSEL 20L TSSOP SD/PS IN1 7 14 SD/PS IN2 8 13 SD/PS IN3 FMS6246 Rev. 1A Pin Assignments Pin# Pin Type 1 SD IN1 Input 2 SD IN2 Input 3 SD IN3 Input 4 N/C Input 5 Vcc Input SD OUT1 6 FcSEL Input SD OUT2 7 SD/PS IN1 ...

Page 3

... Thermal Resistance (Theta ), JEDEC Standard Multi-Layer Test JA Boards, Still Air Recommended Operating Conditions Parameter Operating Temperature Range Supply Voltage Range Factory Programming Options Part Name Part Number FMS6246 FMS6246MTC20 FMS6246-9 FMS6246MTC209 FMS6246 Rev. 1A Min. Max. -0 Min. Typ. -65 74 Min. ...

Page 4

... Crosstalk (ch-to-ch) TALKPS 2 SNR Signal-to-Noise Ratio t Propagation Delay pdPS Notes: 1. 100% tested at 25°C 2. SNR = 20 * log (714mV / rms noise) FMS6246 Rev. 1A Conditions no load Referenced to GND, if DC-coupled F cSEL F cSEL = 37.5Ω, all inputs AC coupled with 0.1uF, all outputs AC coupled source Conditions All SD Channels ...

Page 5

... DVD or LCVF STB Clamp SoC Active DAC Output Figure 4. AC-coupled Inputs, DC-coupled Outputs When the FMS6246 is driven by an unknown external source or a SCART switch with its own clamping circuitry the inputs should be AC-coupled as follows 1.4V 0.1u External Video source must be AC-coupled. 75 Figure 5. SCART Configuration with DC-coupled ...

Page 6

... Fairchild offers a demonstration board, FMS6246DEMO, to use as a guide for layout and to aid in device testing and characterization. The FMS6246DEMO is a 4-layer board with a full power and ground plane. Following this layout configuration will provide the optimum performance and thermal characteristics. For optimum ...

Page 7

... The following circuit may be used for direct DC-coupled drive by DACs with an output voltage range 1.4V. AC-coupled or DC- coupled outputs may be used with AC-coupled outputs offering slightly lower power dissipation. DVD Player or STB Y1 OUT C OUT CV OUT Video SoC G/Y2 OUT B/Pb OUT R/Pr OUT DAC Load Resistors FMS6246 Rev. 1A +5V 0 75Ω IN1 SD OUT1 2 75Ω ...

Page 8

... Lead SYMBOL MIN NOM D 2.90 3.0 E1 4.30 4.40 E 6.4 BSC e 0.65 BSC Lead SYMBOL MIN NOM D 6.50 6.50 E1 4.30 4.40 E 6.4 BSC e 0.65 BSC N 20 FMS6246 Rev – B – SECTION (02) (0.20) R1 – H – R GAGE PLANE (03) 0. (L1) 14 Lead MAX SYMBOL MIN NOM MAX 3 ...

Page 9

... Ordering Information Model Part Number FMS6246 FMS6246MTC20 FMS6246 FMS6246MTC20X Temperature range for all parts: 0°C to 70°C. Contact Fairchild for additional gain options. Refer to Factory Programming Options Table for more information. FMS6246 Rev. 1A Gain Option Lead Free Package 6dB Yes TSSOP-20 ...

Page 10

... PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Preliminary No Identification Needed Obsolete FMS6246 Rev. 1A ISOPLANAR™ POP™ Power247™ LittleFET™ PowerTrench MICROCOUPLER™ QFET MicroFET™ QS™ ...

Related keywords