SGM9121YC6G/TR [SGMICRO]
8MHz, 5th-Order Video Driver;
| 型号： | SGM9121YC6G/TR |
| 厂家： | 
Shengbang Microelectronics Co, Ltd |
| 描述： | 8MHz, 5th-Order Video Driver |
| 文件： | 总11页 (文件大小：456K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SGM9121
8MHz, 5th-Order Video Driver
with 6dB Gain
GENERAL DESCRIPTION
FEATURES
The SGM9121 is a single rail-to-rail 5th-order output
reconstruction filter with a -3dB bandwidth of 8MHz and
35V/µs slew rate. Operating from single power supply
ranging from 3.0V to 5.5V and sinking an ultra-low 6mA
quiescent current, the SGM9121 is ideally suited for
low power, battery-operated applications.
Excellent Video Performance
5th-Order Reconstruction Filter
Internal Gain: 6dB
Rail-to-Rail Output
SAG Correction Reduces AC Coupling
Capacitor Size
Input Voltage Range Includes Ground
AC-Coupled Input
SGM9121 employs an internal level shift circuit that
avoids sync-pulse clipping and allows DC-coupled
output. If AC coupling is preferred, the SGM9121 offers
a sag-correction feature that significantly reduces the
size of the output coupling capacitor.
Single Power Supply: 3.0V to 5.5V
Low Power
6mA Typical Supply Current
0.1μA Typical Supply Current when Disabled
Available in Green SC70-6 Package
-40℃ to +85℃ Operating Temperature Range
SGM9121 has a power-down disable feature that
reduces the supply current to 0.1μA, dramatically
reducing power consumption and prolonging battery
life.
APPLICATIONS
It operates over an ambient temperature range of -40℃
to +85℃.
Video Amplifiers
Cable and Satellite Set-Top Boxes
Communication Devices
Video on Demand
BLOCK DIAGRAM
To External Power
Supply or Control I/O
VCC = 3.0V to 5.5V
Portable and Handheld Products
Personal Video Recorders
DVD Players
10kΩ
VCC
DISABLE
Level
Shifter
HDTV
5th-Order
Filter
IN
OUT
SAG
6dB
SGM9121
GND
NOTES:
1. A 10kΩ resistor must be serially connected to
DISABLE
pin.
2. Power supply VCC must be sequenced on first before input
video signals.
REV. A. 4
SG Micro Corp
www.sg-micro.com
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9121
PACKAGE/ORDERING INFORMATION
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
DESCRIPTION
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
MODEL
SGM9121
SC70-6
SGM9121YC6G/TR
S0AXX
Tape and Reel, 3000
-40℃ to +85℃
NOTE: XX = Date Code.
MARKING INFORMATION
S0A X X
Green (RoHS & HSF): SG Micro Corp defines "Green" to
mean Pb-Free (RoHS compatible) and free of halogen
substances. If you have additional comments or questions,
please contact your SGMICRO representative directly.
Date code - Month ("A" = Jan. "B" = Feb. …"L" = Dec.)
Date code - Year ("A" = 2010, "B" = 2011 …)
Chip I.D.
For example: S0AFA (2015, January)
ABSOLUTE MAXIMUM RATINGS
ESD SENSITIVITY CAUTION
Input Voltage Range.....................GND - 0.3V to VCC + 0.3V
Supply Voltage, VCC....................................................... 6.0V
Junction Temperature ..................................................150℃
Storage Temperature Range........................ -65℃ to +150℃
Lead Temperature (Soldering, 10s)..............................260℃
ESD Susceptibility
This integrated circuit can be damaged by ESD if you don’t
pay attention to ESD protection. SGMICRO 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.
HBM............................................................................ 8000V
MM................................................................................ 400V
CDM ........................................................................... 2000V
RECOMMENDED OPERATING CONDITIONS
Operating Voltage Range...................................3.0V to 5.5V
Operating Temperature Range ...................... -40℃ to +85℃
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, specification or other related things if
necessary without notice at any time.
OVERSTRESS CAUTION
Stresses beyond those listed may cause permanent damage
to the device. Functional operation of the device at these or
any other conditions beyond those indicated in the
operational section of the specification is not implied.
Exposure to absolute maximum rating conditions for
extended periods may affect reliability.
2
SG Micro Corp
www.sg-micro.com
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9121
PIN CONFIGURATION
(TOP VIEW)
6
5
4
VCC
IN
GND
SAG
1
2
3
DISABLE
OUT
SC70-6
PIN DESCRIPTION
PIN
1
NAME
IN
FUNCTION
Signal Input.
Ground.
2
GND
SAG
OUT
SAG Correction.
Signal Output.
Shutdown Input.
Power Supply.
3
4
5
DISABLE
VCC
6
3
SG Micro Corp
www.sg-micro.com
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9121
ELECTRICAL CHARACTERISTICS
(At VCC = 5V, RL = 150Ω connected to GND, VIN = 1VPP and CIN = 0.1μF, output AC-coupled, referenced to 400kHz, unless
otherwise noted.)
PARAMETER
CONDITIONS
TEMP
MIN
TYP
MAX
UNITS
INPUT CHARACTERISTICS
340
570
675
+25℃
-40℃ to +85℃
+25℃
Output Level Shift Voltage (VOLS
)
VIN = 0V, No load
mV
-285
-390
-5.5
-6.8
-210
-4.8
1.9
6
Input Voltage Clamp (VCLAMP
Clamp Charge Current
Clamp Discharge Current
Voltage Gain (AV)
)
IIN = -3.5mA
mV
-40℃ to +85℃
+25℃
VIN = VCLAMP - 100mV
VIN = 500mV
mA
-40℃ to +85℃
+25℃
2.7
3.2
µA
-40℃ to +85℃
+25℃
5.6
6.4
RL = 150Ω
dB
5.55
6.45
-40℃ to +85℃
OUTPUT CHARACTERISTICS
4.6
4.5
80
4.79
95
+25℃
-40℃ to +85℃
+25℃
Output Voltage High Swing
VIN = 3.0V, RL = 150Ω to GND
V
VIN = 1.5V, Out shorted to GND through
10Ω
mA
mA
77
-40℃ to +85℃
+25℃
Output Short-Circuit Current (ISC
)
-102
-87
-78
VIN = 0.5V, Out shorted to VCC through
10Ω
-40℃ to +85℃
POWER SUPPLY
Operating Voltage Range (VCC
)
3.0
40
38
5.5
V
+25℃
+25℃
50
6
Power Supply Rejection Ratio (PSRR)
Quiescent Current (IQ)
VCC = 3.5V to 5.0V
dB
-40℃ to +85℃
+25℃
9.5
11.5
18
VIN = 0.5V,
DISABLE
= VCC, RL = 0Ω
mA
DISABLE
= 0V
-40℃ to +85℃
+25℃
0.1
Supply Current when Disabled
μA
20
-40℃ to +85℃
DYNAMIC PERFORMANCE
-0.1dB Bandwidth
6
8
MHz
MHz
dB
V/µs
%
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
+25℃
-3dB Bandwidth
Filter Response (Normalized Gain)
Slew Rate
fIN = 27MHz
47
35
0.85
0.85
1
2V Output step, 80% to 20%
PAL DC-coupled
Differential Gain Error (DG)
Differential Phase Error (DP)
PAL AC-coupled
%
PAL DC-coupled
°
PAL AC-coupled
1.4
28
34
33
°
Group Delay Variation (D/DT)
Fall Time
Difference between 400kHz and 6.5MHz
2V Output step, 80% to 20%
2V Output step, 80% to 20%
ns
ns
Rise Time
ns
POWER-DOWN DISABLE
(Logic-Low Threshold)
DISABLE
VCC = 5V
VCC = 5V
0.4
V
V
+25℃
+25℃
(Logic-High Threshold)
DISABLE
1.2
4
SG Micro Corp
www.sg-micro.com
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9121
TYPICAL PERFORMANCE CHARACTERISTICS
At VCC = 5V, TA = +25℃, RL = 150Ω, output AC-coupled, unless otherwise noted.
Gain vs. Frequency
Phase vs. Frequency
3
0
270
180
90
-3
0
-6
-90
-180
-270
-9
-12
-15
0.1
1
10
100
0.75
85
0.1
1
10
100
Frequency (MHz)
Frequency (MHz)
Large Signal Step Response
Small Signal Step Response
1.80
1.20
0.60
0.00
-0.60
-1.20
-1.80
0.18
0.12
0.06
0.00
-0.06
-0.12
-0.18
-0.25
-0.05
0.15
Time (μs)
0.35
0.55
-0.25
-0.05
0.15
Time (µs)
0.35
0.55
0.75
Group Delay vs. Frequency
Gain Error vs. Temperature
100
0.12
0.1
0.08
0.06
0.04
0.02
0
60
20
-20
-60
-100
0.1
1
10
100
-40
-15
10
35
60
Frequency (MHz)
Temperature (℃)
5
SG Micro Corp
www.sg-micro.com
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9121
TYPICAL PERFORMANCE CHARACTERISTICS
At VCC = 5V, TA = +25℃, RL = 150Ω, output AC-coupled, unless otherwise noted.
Quiescent Current vs. Temperature
Quiescent Current vs. Supply Voltage
7
6.5
6
10
8
6
4
5.5
5
2
-40
-15
10
35
60
85
3
3.5
4
4.5
5
5.5
Supply Voltage (V)
Temperature (℃)
Output Voltage Swing to the Positive Rail vs.
Output Current
Output Voltage Swing to the Negative Rail vs.
Output Current
5
4.8
4.6
4.4
4.2
4
1.4
1.2
1
-40℃
+25℃
0.8
0.6
0.4
0.2
0
+85℃
+85℃
+25℃
-40℃
0
20
40
60
80
100
0
20
40
60
80
100
Output Current (mA)
Output Current (mA)
6
SG Micro Corp
www.sg-micro.com
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9121
APPLICATION INFORMATION
The SGM9121 low cost, integrated, 5th-order video
filter is intended to replace passive LC filters and
drivers in low voltage portable video applications.
Internal Sync Clamp
The typical embedded video DAC operates from a
ground referenced single supply. This becomes an
issue because the lower level of the sync pulse output
may be at a 0V reference level to some positive level.
The problem is that presenting a 0V input to most
single supply driven amplifiers will saturate the output
stage of the amplifier, resulting in a clipped sync tip and
degrading the video image. A larger positive reference
may offset the input above its positive range.
The SGM9121 input must be AC-coupled because the
input capacitor stores the clamp voltage. It needs a
typical value of 0.1µF for the input clamp to meet the
Line Droop specification. The SGM9121 output can
drive an AC- or DC-coupled doubly terminated coax
(150Ω) load (see Figure 1). DC coupling the output
removes the need for an expensive and large output
coupling capacitor (see Figure 2). If an AC-coupled
output is needed, the SAG correction circuit can be
used to reduce the AC output coupling capacitor value.
The SGM9121 features an internal sync clamp and
offset function to level shift the entire video signal to the
best level before it reaches the input of the amplifier
stage. These features are also helpful to avoid
saturation of the output stage of the amplifier by setting
the signal closer to the optimal voltage range.
Offering SAG correction, fixed gain of 6dB, and a 5th-
order low pass filter in a tiny space saving package
makes the SGM9121 well suited for space sensitive
applications such as digital cameras, cellular phones
and other portable devices.
The Typical Application Diagram of the SGM9121 in
Figure 1 is divided into four sections. The first, Section
A is the Sync Clamp. The AC-coupled video sync signal
is pulled negative by a current source at the input of the
comparator amplifier. When the sync tip goes below the
comparator threshold, the comparator output is driven
negative, and the PMOS device turns on, clamping
sync tip to near ground level. The network triggers on
the sync tip of video signal.
Enable/Shutdown
The SGM9121 has a shutdown feature that disables
the output and reduces the quiescent current to 0.1μA.
This feature is particularly useful in portable
applications, such as video cameras, hand held gaming
devices and cellular phones, where video filtering and
driving capability are required.
To External Power
Supply or Control I/O
VCC = 3.0V to 5.5V
10kΩ
VCC
DISABLE
Level
Shifter
0.1µF
5th-Order
Filter
IN
COUT
ROUT
OUT
SAG
RIN
CIN
47µF
CS
75Ω
75Ω RL
6dB
22µF
SGM9121
GND
Figure 1. AC-Coupled Input/AC-Coupled Output
7
SG Micro Corp
www.sg-micro.com
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9121
APPLICATION INFORMATION
SAG Correction
Layout and Power-Supply Bypassing
The SGM9121 can use the SAG configuration if an
AC-coupled output video signal is needed. SAG
correction refers to the low-frequency compensation for
the high pass filter formed by the 150Ω load and the
output capacitor. In video applications, the cutoff
frequency must be low enough to pass the vertical sync
interval to avoid field tilt. This cutoff frequency should
be less than 5Hz, and the coupling capacitor must be
very large in normal configuration, typically 220µF. In
SAG configuration, the SGM9121 removes the need for
large coupling capacitors, and instead only requires
one 22µF and one 47µF capacitors (Figure 1) to
achieve the same performance as the large capacitor.
The SGM9121 operates from single 3.0V to 5.5V
supply. Bypass the supply with a 0.1µF capacitor as
close to the pin as possible. It is recommended to use
microstrip and stripline techniques to obtain full
bandwidth. To ensure that the PC board does not
degrade the device’s performance, design it for a
frequency greater than 1GHz. Pay careful attention to
inputs and outputs to avoid large parasitic capacitance.
Whether or not you use a constant-impedance board,
observe the following design guidelines:
● Do not use IC sockets; they increase parasitic
capacitance and inductance.
● Do not use wire-wrap boards; they are too inductive.
● Use surface-mount instead of through-hole
The Sallen Key Low Pass Filter
The Sallen Key in a classic low pass configuration is
illustrated in Figure 1. The filter provides a very stable
low pass function, and in the case of the SGM9121, a
5th-order roll-off at around 8MHz. The 5th-order
function is accomplished with an RC low pass network
placed in series with and before the Sallen Key. One
pole provided by the RC network and poles two and
three provided by the Sallen Key produce a nice
5th-order roll-off at around 8MHz.
components for better, high-frequency performance.
● Use a PC board with at least two layers; it should be
as free from voids as possible.
● Keep signal lines as short and as straight as possible.
Do not make 90° turns; round all corners.
To External Power
Supply or Control I/O
VCC = 3.0V to 5.5V
10kΩ
VCC
DISABLE
Level
Shifter
0.1µF
5th-Order
Filter
IN
ROUT
OUT
SAG
RIN
CIN
75Ω
75Ω RL
6dB
SGM9121
GND
Figure 2. AC-Coupled Input/DC-Coupled Output
8
SG Micro Corp
www.sg-micro.com
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
SC70-6
D
e1
0.65
e
E1
E
1.9
0.75
0.4
b
1.3
RECOMMENDED LAND PATTERN (Unit: mm)
L
L1
A
c
A1
A2
θ
0.20
Dimensions
In Millimeters
Dimensions
In Inches
Symbol
MIN
MAX
1.100
0.100
1.000
0.350
0.150
2.200
1.350
2.450
MIN
MAX
0.043
0.004
0.039
0.014
0.006
0.087
0.053
0.096
A
A1
A2
b
0.900
0.000
0.900
0.150
0.080
2.000
1.150
2.150
0.035
0.000
0.035
0.006
0.003
0.079
0.045
0.085
c
D
E
E1
e
0.65 TYP
1.300 BSC
0.525 REF
0.026 TYP
0.051 BSC
0.021 REF
e1
L
L1
θ
0.260
0°
0.460
8°
0.010
0°
0.018
8°
TX00044.000
SG Micro Corp
www.sg-micro.com
PACKAGE INFORMATION
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
P2
P0
W
Q2
Q4
Q2
Q4
Q2
Q4
Q1
Q3
Q1
Q3
Q1
Q3
B0
Reel Diameter
P1
A0
K0
Reel Width (W1)
DIRECTION OF FEED
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF TAPE AND REEL
Reel Width
Reel
Diameter
A0
B0
K0
P0
P1
P2
W
Pin1
Quadrant
Package Type
W1
(mm)
(mm) (mm) (mm) (mm) (mm) (mm) (mm)
SC70-6
7″
9.5
2.4
2.5
1.2
4.0
4.0
2.0
8.0
Q3
TX10000.000
SG Micro Corp
www.sg-micro.com
PACKAGE INFORMATION
CARTON BOX DIMENSIONS
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF CARTON BOX
Length
(mm)
Width
(mm)
Height
(mm)
Reel Type
Pizza/Carton
7″ (Option)
7″
368
442
227
410
224
224
8
18
TX20000.000
SG Micro Corp
www.sg-micro.com
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