SGM9123 [SGMICRO]

Triple, 8MHz, 3rd Order SDTV Video Filter Drivers; 三重，为8MHz ， 3阶标清视频滤波驱动器


型号：	SGM9123
厂家：	Shengbang Microelectronics Co, Ltd
描述：	Triple, 8MHz, 3rd Order SDTV Video Filter Drivers 三重，为8MHz ， 3阶标清视频滤波驱动器驱动器电视
文件：	总9页 (文件大小：546K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Triple, 8MHz, 3rd Order

SDTV Video Filter Drivers

SGM9123

GENERAL DESCRIPTION

FEATURES

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.

• 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)

7.4mA Total Supply Current

• Lead (Pb) Free SO-8 Package

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.

APPLICATIONS

Video Amplifiers

Cable and Satellite Set Top Boxes

Communications Devices

Video on Demand

Portable and Handheld Products

Personal Video Recorders

DVD Players

The SGM9123 has lead (Pb) free SO-8 package and

ESD (HBM) reaches 8KV.

SDTVs

BLOCK DIAGRAM

SG Microelectronics Co, Ltd

Tel: 86/10/51798160/80

www.sg-micro.com

REV. A

ELECTRICAL CHARACTERISTICS: V_S= +5.0V

(At RL = 150Ω connected to GND, VIN = 1Vpp，and CIN = 0.1µF, all outputs AC coupled with 220µF，unless

otherwise noted)

SGM9123

PARAMETER

CONDITIONS

TYP

MIN/MAX OVER TEMPERATURE

0℃ -40℃ MIN/

+25℃ +25℃ to+70℃

to+85℃ UNITS MAX

INPUT CHARACTERISTICS

Output Level Shift Voltage (V_OLS

)

V_IN= 0V, no load

I_IN= -1mA

V_IN= V_CLAMP-100mV

R_L= 150Ω

258

-13

-5.60

2.0

419

-27

-8.2

1.89

2.07

423

-27.6

-8.23

1.88

2.08

440

-28.7

-8.24

1.87

2.09

V/V

MAX

MIN

MAX

Input Voltage Clamp (V_CLAMP

Clamp Charge Current

Voltage Gain ( A_V)

)

OUTPUT CHARACTERISTICS

Output Voltage High Swing

V_IN= 3V, R_L= 150Ω to GND

V_IN= 3V, to GND through 10Ω

V_IN= 100mV, out short to V_DDthrough 10Ω

4.42

110

162

4.15

102

4.13

4.12

MIN

Output Short-Circuit Current (I_SC

)

POWER SUPPLY

Operating Voltage Range

2.5

5.5

2.7

5.5

2.7

5.5

MIN

MAX

MIN

Power Supply Rejection Ratio (PSRR)

Quiescent Current (I_Q)

V_s= +2.7V to + 5.5V

V_IN= 500mV,

7.4

9.5

10.5

10.7

MAX

DYNAMIC PERFORMANCE

±0.1dB Bandwidth

-3dB Bandwidth

R_L= 150Ω

5.4

8.0

MHz

TYP

Filter Response

Normalized Gain: f_IN= 4.5MHz

f_IN= 27MHz

Slew Rate

+0.2

-25

0.2

0.52

0.4

1.0

17.5

-64

V/µs

TYP

20% to 80%, V_IN= 1V Step,

NTSC & PAL DC coupled

NTSC & PAL AC coupled

NTSC & PAL DC coupled

NTSC & PAL AC coupled

f = 400KHz, 6.5MHz

at 1MHz

2.0V_STEP, 80% to 20%

Differential Gain (DG)

Differential Phase (DP)

Group Delay Variation (D/DT)

Crosstalk (channel - to - channel)

Fall Time

Rise Time

Specifications subject to change without notice.

SGM9123

PACKAGE/ORDERING INFORMATION

PACKAGE

DESCRIPTION

SO-8

TEMPERATURE

RANGE

-40℃ to +125℃

PACKAGE

OPTION

Tape and Reel, 2500

MARKING

INFORMATION

SGM9123XS

ORDER NUMBER

SGM9123XS/TR

PIN CONFIGURATION (Top View)

PIN DESCRIPTION

PIN NAME

FUNCTION

Video input, channel 1

Video input, channel 2

Video input, channel 3

Power supply

IN1

IN2

IN3

+VS

Ground

GND

OUT3

OUT2

OUT1

Filtered output, channel 3

Filtered output, channel 2

Filtered output, channel 1

CAUTION

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, V+ to V- .......................................... 6.5V

Input Voltage

.......................... GND – 0.3 V to (+V^S) +0.3V

Storage Temperature Range..................–65℃ to +150℃

Junction Temperature ............................................. 160℃

Operating Temperature Range ........... –40℃ to +125℃

Power Dissipation, P^D@ TA = 25℃

SO-8 .............................................................................0.8W

Package Thermal Resistance

SO-8, θJA................................................................ 125℃/W

Lead Temperature Range (Soldering 10sec)

...................................................... 260℃

This integrated circuit can be damaged by ESD if

you don’t pay attention to ESD protection. SG

Micro-electronics recommends that all integrated

circuits be handled with appropriate precautions.

Failure to observe proper handling and installation

procedures can cause damage.

ESD damage can range from subtle performance

degradation to complete device failure. Precision

integrated circuits may be more susceptible to

damage because very small parametric changes

could cause the device not to meet its published

specifications.

ESD Susceptibility

HBM...........................................................................8000V

MM...............................................................................400V

NOTES

1. Stresses above those listed under Absolute Maximum

Ratings may cause permanent damage to the device. This is

a stress rating only; functional operation of the device at

these or any other conditions above those indicated in the

operational section of this specification is not implied.

Exposure to absolute maximum rating conditions for

extended periods may affect device reliability.

SGM9123

TYPICAL PERFORMANCE CHARACTERISTICS

At V_S= +5.0V, T_A= +25℃, R_L= 150Ω, all outputs AC coupled with 220µF, unless otherwise noted.

Frequency Response

Phase vs. Frequency

270

180

-3

-6

-90

-180

-270

-9

-12

-15

0.01

0.1

100

0.1

100

Frequency (MHz)

Large Signal Step Response

Small Signal Step Response

0.75

0.5

0.3

0.2

0.1

0.25

-0.25

-0.5

-0.75

-0.1

-0.2

-0.3

-0.5 -0.4 -0.3 -0.2 -0.1

0.1 0.2 0.3 0.4 0.5

-0.5 -0.4 -0.3 -0.2 -0.1

0.1 0.2 0.3 0.4 0.5

Time (µs)

PSRR vs. Frequency (No Bypass Caps)

PSRR vs. Frequency (Bypass Caps)

-40

-45

-50

-55

-60

-65

-70

-75

-80

-85

-90

-10

-20

-30

-40

-50

-60

-70

-80

0.01

0.1

100

0.01

0.1

100

Frequency (MHz)

SGM9123

TYPICAL PERFORMANCE CHARACTERISTICS

At V_S= +5.0V, T_A= +25℃, R_L= 150Ω, all outputs AC coupled with 220µF, unless otherwise noted.

Gain Error vs. Temperature

Quiescent Current vs. Supply Voltage

8.5

1.8

1.6

1.4

1.2

7.5

6.5

0.8

0.6

0.4

0.2

5.5

4.5

-40

-15

110

2.5

3.5

4.5

5.5

Temperature (℃)

Supply Voltage (V)

Group Delay vs. Frequency

Quiescent Current vs. Temperature

0.01

0.1

-40

-15

110

Frequency (MHz)

Temperature (℃)

Output Voltage Swing to The Positive Rail vs.

Output Current

Output Voltage Swing to The Negative Rail

vs. Output Current

1.2

4.75

4.5

4.25

0.8

0.6

0.4

0.2

-40℃

+25℃

+85℃

3.75

3.5

3.25

+25℃

-40℃

100

Output Current (mA)

SGM9123

Applications Information

Functional Description

Typical Application Diagram

The following schematic in Figure 3 is normally used for AC

coupled output and DC-coupled input with DAC which has an

output voltage range of 0V to 1.4V. AC coupled output offer

slightly lower power dissipation and high ESD protection ability.

The schematics in Figure 1 and Figure 2 are also popular in

SGM9123 operates from a single +2.5V to +5V supply. In

application, SGM9123 is a fully integrated solution for filtering

and buffering SDTV signals in front of video decoder or behind

video encoder. For example, SGM9123 can replace three

passive LC filters and three amplifier drivers at CVBS and

S-video output side in set-top box and DVD player, this solution

can help you save PCB size and production cost, it also

improves video signal performance comparing with traditional

design using discrete components. SGM9123 features a

DC-coupled input buffer, 3-pole low-pass filter to eliminate

out-of-band noise of video encoder, and a gain of +6dB in the

output amplifier to drive 75Ω load. The AC or DC-coupled input

buffer eliminates sync crush, droop, and field tilt. The output of

SGM9123 also can be DC-coupled or AC-coupled.

design. Figure 4 is a kind of special application in STB.

+5V

0.1µF

or 0.01µF

10µF

+V_S

OUT1

SGM9123

CVBS₁

IN1

CVBS₁

75Ω

IN2

OUT2

75Ω

S-Video

Input Considerations

IN3

OUT3

Besides AC coupling, the SGM9123 inputs also can be

DC-coupled. In DC coupling application, No input coupling

capacitors are needed because the amplitude of input video

signal from DAC includes ground and extends up to 1.4V, then

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 of

0V to 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.

GND

Figure 1. DC Coupling Application Schematic

Output Considerations

The SGM9123 outputs can be DC-coupled or AC-coupled.

When 0V is input, the SGM9123 output voltage is 260mV

typically. In DC coupling design, one 75Ω resistor is used to

Connect SGM9123’s output pin with external load directly, this

serial back-termination resistor is used to match the impedance

of the transmission line between SGM9123 and external load

to cancel the signal reflection. The SGM9123 outputs can sink

and source current allowing the device to be AC-coupled with

external load, in AC coupling, 220µF at least capacitor will be

used in order to eliminate field tilt.

Figure 2. AC Coupling Application Schematic

+5V

0.1µF

Power-Supply Bypassing and Layout

10µF

or 0.01µF

Correct power supply bypassing is very important for

optimizing video performance in design. One 0.1µF and one

10µF capacitors are always used to Bypass V_CCpin of

SGM9123, please place these two capacitors as close to the

SGM9123 output pin as possible, a large ground plane is also

needed to ensure optimum performance. The input and output

termination resistors should be placed as close to the related

pin of SGM9123 as possible to avoid performance degradation.

The PCB traces at the output side should have 75Ω

characteristic impedance in order to match the 75Ω

characteristic impedance cable connecting external load. In

design, please keep the board trace at the inputs and outputs

of the SGM9123 as short as possible to minimize the parasitic

stray capacitance and noise pickup.

+V_S

CVBS₁

IN1

OUT1

CVBS₁

75Ω

220µF

75Ω

SGM9123

IN2

OUT2

OUT3

75Ω

220µF

S-Video

IN3

GND

Figure 3. Input DC Coupling and Output AC

Coupling Application Schematic

SGM9123

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

SGM9123

PACKAGE OUTLINE DIMENSIONS

SO-8

Dimensions

In Inches

Symbol

In Millimeters

Min

1.350

0.100

1.350

0.330

0.190

4.780

3.800

5.800

Max

1.750

0.250

1.550

0.510

0.250

5.000

4.000

6.300

Min

0.053

0.004

0.053

0.013

0.007

0.188

0.150

0.228

Max

0.069

0.010

0.061

0.020

0.010

0.197

0.157

0.248

1.270TYP

0.050TYP

0.400

0°

1.270

8°

0.016

0°

0.050

8°

SGM9123

REVISION HISTORY

Location

Page

11/2007— Preliminary Data Sheet

01/2008— Data Sheet REV.A

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

SGM9123

SGM9123 [SGMICRO]

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