SGM9123 Shengbang Microelectronics, SGM9123 Datasheet

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SGM9123

Manufacturer Part Number
SGM9123
Description
3rd Order SDTV Video Filter Drivers
Manufacturer
Shengbang Microelectronics
Datasheet

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GENERAL DESCRIPTION
SGM9123 is a video buffer which integrates triple 6dB
Gain rail-to-rail output driver and triple 3rd output
reconstruction filter, it has 8MHz -3dB bandwidth and
44V/µs slew rate. SGM9123 provides improved image
quality compared with passive LC filters and discrete
drivers solution. Operating from single supplies
ranging from +2.5V to +5.5V and sinking an ultra-low
7.4mA quiescent current, the SGM9123 is ideally
suited for battery powered applications.
SGM9123 can be DC-coupled or AC-coupled with
input video signal, such as the output stage of DAC to
eliminate out-of-band noise. Internal diode clamps
and bias circuitry may be used if AC-coupled inputs
are required. SGM9123 also integrates an internal
level shift circuit which avoids sync-pulse being
clipped and allows DC-coupled output. The drivers in
SGM9123 can drive DC or AC-coupled single (150Ω)
or dual (75 Ω) loads.
The SGM9123 has lead (Pb) free SO-8 package and
ESD (HBM) reaches 8KV.
BLOCK DIAGRAM
SGM9123
SG Microelectronics Co, Ltd
Tel: 86/10/51798160/80
www.sg-micro.com
FEATURES
• Triple 3rd order 8MHz (SD) Filters
• Transparent Input Clamping
• 6dB Output Driver Gain and Drive Dual Video Load
• Rail-to-Rail Output
• Input Voltage Range Includes Ground
• AC or DC Coupled Inputs
• AC or DC Coupled Outputs
• Operates from 2.5V to 5.5V Single Power Supply
• Low Power (2.5mA/channel)
• Lead (Pb) Free SO-8 Package
APPLICATIONS
Video Amplifiers
Cable and Satellite Set Top Boxes
Communications Devices
Video on Demand
Portable and Handheld Products
Personal Video Recorders
DVD Players
SDTVs
7.4mA Total Supply Current
SDTV Video Filter Drivers
Triple, 8MHz, 3rd Order
REV. A

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SGM9123 Summary of contents

Page 1

... DC-coupled output. The drivers in SGM9123 can drive DC or AC-coupled single (150Ω) or dual (75 Ω) loads. The SGM9123 has lead (Pb) free SO-8 package and ESD (HBM) reaches 8KV. BLOCK DIAGRAM SG Microelectronics Co, Ltd Tel: 86/10/51798160/80 www ...

Page 2

... MHz 8.0 MHz +0 V/µs 0.2 % 0.52 % 0.4 ° 1.0 ° 17 SGM9123 MIN/ MAX MAX MIN MIN MIN MAX MIN MIN MIN MIN MAX MIN MAX TYP TYP TYP TYP TYP TYP TYP TYP TYP TYP TYP TYP TYP ...

Page 3

... Tape and Reel, 2500 SGM9123XS PIN NAME FUNCTION Video input, channel 1 1 IN1 Video input, channel 2 2 IN2 Video input, channel 3 3 IN3 Power supply Ground 5 GND Filtered output, channel 3 6 OUT3 Filtered output, channel 2 7 OUT2 Filtered output, channel 1 8 OUT1 SGM9123 ...

Page 4

... Frequency (MHz 100 0 0.1 0.2 0.3 0.4 0 100 4 Phase vs. Frequency 270 180 90 0 -90 -180 -270 0 Frequency (MHz) Small Signal Step Response 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 Time (µs) PSRR vs. Frequency (No Bypass Caps) 0 -10 -20 -30 -40 -50 -60 -70 -80 0.01 0 Frequency (MHz) SGM9123 100 100 ...

Page 5

... Quiescent Current vs. Supply Voltage 9 8.5 8 7.5 7 6.5 6 5.5 5 4.5 4 2.5 3 3.5 4 4.5 Supply Voltage (V) Quiescent Current vs. Temperature -40 - Temperature (℃) Output Voltage Swing to The Positive Rail vs. Output Current 5 4.75 4.5 4.25 4 +85℃ 3.75 3.5 +25℃ 3.25 -40℃ Output Current (mA) SGM9123 5 5.5 85 110 80 100 ...

Page 6

... SGM9123 can be directly connected to the output of a single-supply, current-output DAC without any external bias network. Some time, if DAC’s output level exceeds the range 1.4V, or SGM9123 is driven by an unknown external source or a SCART switch which has its own clamping circuit, AC coupling is needed in such applications. ...

Page 7

... Figure 4. Input DC Coupling and Output AC Coupling Application Schematic in STB 7 SGM9123 ...

Page 8

... SGM9123 ...

Page 9

... REVISION HISTORY Location 11/2007— Preliminary Data Sheet 01/2008— Data Sheet REV.A www.DataSheet4U.com SG Microelectronics Co., Ltd A2608, NO.72 North Road Xisanhuan, Haidian District, Beijing, China 100037 Tel: 86-10-51798160/80 Fax: 86-10-51798180-803 www.sg-micro.com 9 Page SGM9123 ...

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