SGM9114 8MHz, 5th-Order Video Driver with 6dB Gain

SGM9114 8MHz, 5th-Order Video Driver with 6dB Gain
SGM9114
8MHz, 5th-Order Video Driver
with 6dB Gain
PRODUCT DESCRIPTION
FEATURES
The SGM9114 is a single rail-to-rail 5th-order output
reconstruction filter with a -3dB bandwidth of 8MHz and
33.7V/µs slew rate. Operating from single power supply
ranging from 3.0V to 5.5V and sinking an ultra-low 7mA
quiescent current, the SGM9114 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- and DC-Coupled Input
Single Power Supply: 3.0V to 5.5V
SGM9114 employs an internal level shift circuit that
avoids sync-pulse clipping and allows DC-coupled output.
If AC coupling is preferred, the SGM9114 offers a
sag-correction feature that significantly reduces the size
of the output coupling capacitor.
SGM9114 has a power-down disable feature that
reduces the supply current to 0.72μA, dramatically
reducing power consumption and prolonging battery life.
It is specified over the extended -40℃ to +85℃
temperature range.
BLOCK DIAGRAM
VCC = 3.0V to 5.5V


Low Power
7mA Typical Supply Current
0.72μA Supply Current when Disabled
Available in Green SOT-23-6 Package
APPLICATIONS
Video Amplifiers
Cable and Satellite Set-Top Boxes
Communication Devices
Video on Demand
Portable and Handheld Products
Personal Video Recorders
DVD Players
HDTV
To External Power
Supply or Control I/O
10kΩ
VCC



DISABLE
Level
Shifter
IN
5th-Order
Filter
OUT
6dB
SAG
SGM9114
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.
SG Micro Corp
www.sg-micro.com
REV. B
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9114
PACKAGE/ORDERING INFORMATION
ORDER NUMBER
PACKAGE
DESCRIPTION
TEMPERATURE
RANGE
PACKAGE
OPTION
MARKING
INFORMATION
SGM9114YN6G/TR
SOT-23-6
-40℃ to +85℃
Tape and Reel, 3000
S07XX
NOTE: Order number and package marking are defined as the follow:
MARKING INFORMATION
S07 X X
ORDER NUMBER
SGM9114 X X G / TR
Tape and Reel
Date code - Month ("A" = Jan. "B" = Feb. … "L" = Dec.)
Green Product
Date code - Year ("9" = 2009, "A" = 2010 …)
Package Type
Chip I.D.
N6
SOT-23-6
Operating Temperature Range
Y
For example: S079A (2009, January)
-40℃ to +85℃
ABSOLUTE MAXIMUM RATINGS
CAUTION
Supply Voltage, VCC to GND..................................................6V
Input Voltage.....................................GND - 0.3V to VCC + 0.3V
Storage Temperature Range ...........................-65℃ to +150℃
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.
Junction Temperature ......................................................150℃
Operating Temperature Range.......................... -40℃ to +85℃
Lead Temperature Range (Soldering 10 sec).................. 260℃
ESD Susceptibility
HBM................................................................................. 8000V
MM......................................................................................400V
NOTE:
Stresses beyond those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device. These
are stress ratings only, and functional operation of the device at
these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied.
Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
SG Micro Corp
www.sg-micro.com
SGMICRO reserves the right to make any change in circuit
design, specification or other related things if necessary without
notice at any time. Please contact SGMICRO sales office to get
the latest datasheet.
2
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9114
PIN CONFIGURATION (TOP VIEW)
1
OUT
2
SAG
3
S07XX
DISABLE
6
VCC
5
GND
4
IN
SOT-23-6
NOTE: The location of pin 1 on the SOT-23-6 is determined by orienting the package marking as shown.
PIN DESCRIPTION
PIN
NAME
1
DISABLE
2
OUT
Signal Output
3
SAG
SAG Correction.
4
IN
5
GND
6
VCC
SG Micro Corp
www.sg-micro.com
FUNCTION
Shutdown Input.
Signal Input.
Ground.
Power Supply.
3
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9114
ELECTRICAL CHARACTERISTICS: VCC = 5.0V
(At RL = 150Ω connected to GND, VIN = 1VPP and CIN = 0.1μF, all outputs AC-coupled, referenced to 400kHz, unless otherwise noted.)
PARAMETER
CONDITIONS
TEMP
MIN
TYP
MAX
336
480
UNITS
INPUT CHARACTERISTICS
Output Level Shift Voltage (VOLS)
VIN = 0V, No load
Input Voltage Clamp (VCLAMP)
IIN = - 3.5mA
Clamp Charge Current
VIN = VCLAMP - 100mV
Clamp Discharge Current
VIN = 500mV
Voltage Gain (AV)
RL = 150Ω
+25°C
540
-40°C to +85°C
+25°C
-180
-40°C to +85°C
-269
+25°C
-6.0
-40°C to +85°C
-6.8
-119
mV
-4.8
1.9
+25°C
mA
2.6
3.2
-40°C to +85°C
+25°C
5.6
-40°C to +85°C
5.3
6
mV
6.4
6.5
µA
dB
OUTPUT CHARACTERISTICS
Output Voltage High Swing
VIN = 3.0V, RL = 150Ω to GND
VIN = 0.5V, Out shorted to GND through 10Ω
Output Short-Circuit Current (ISC)
VIN = 1.5V, Out shorted to VCC through 10Ω
+25°C
4.60
-40°C to +85°C
4.50
+25°C
90
-40°C to +85°C
80
+25°C
4.79
V
124
-133
mA
-100
-89
-40°C to +85°C
mA
POWER SUPPLY
Operating Voltage Range
Power Supply Rejection Ratio (PSRR)
VCC = 3.5V to 5.0V
Quiescent Current (IQ)
VIN = 0.5V, DISABLE = VCC, RL = 0
Supply Current when Disabled
DISABLE = 0V
+25°C
3.0
+25°C
45
-40°C to +85°C
44
+25°C
5.5
52
7.0
dB
9.5
12.4
-40°C to +85°C
+25°C
0.72
10
13
-40°C to +85°C
V
mA
μA
DYNAMIC PERFORMANCE
-0.1dB Bandwidth
-3dB Bandwidth
+25°C
5.6
MHz
MHz
+25°C
7.8
Filter Response (Normalized Gain)
fIN = 27MHz
+25°C
44
dB
Slew Rate
2V Output step, 80% to 20%
+25°C
33.7
V/µs
PAL DC-coupled
+25°C
0.38
%
PAL AC-coupled
+25°C
0.27
%
°
Differential Gain Error (DG)
PAL DC-coupled
+25°C
1.0
PAL AC-coupled
+25°C
1.1
°
Group Delay Variation (D/DT)
Difference between 400kHz and 6.5MHz
+25°C
30.7
ns
Fall Time
2V Output step, 80% to 20%
+25°C
35.5
ns
Rise Time
2V Output step, 80% to 20%
+25°C
36.5
ns
DISABLE (Logic-Low Threshold)
VCC = 5V
+25°C
DISABLE (Logic-High Threshold)
VCC = 5V
+25°C
Differential Phase Error (DP)
POWER-DOWN DISABLE
SG Micro Corp
www.sg-micro.com
0.4
1.2
V
V
4
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9114
TYPICAL PERFORMANCE CHARACTERISTICS
At VCC = 5V, TA = +25℃, RL = 150Ω, all outputs AC-coupled, unless otherwise noted.
Phase vs. Frequency
270
0
180
Phase (degree)
Normalized Gain (dB)
Frequency Response
3
-3
-6
-9
-12
90
0
-90
-180
-15
-270
0.1
1
10
Frequency (MHz)
100
0.1
0.3
0.5
0.2
0.25
0
-0.25
0.1
0
-0.1
-0.5
-0.2
-0.75
-0.3
-0.3 -0.2 -0.1
0
-0.3 -0.2 -0.1
0.1 0.2 0.3 0.4 0.5 0.6 0.7
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7
Time (μs)
Time (μs)
Group Delay vs. Frequency
Quiescent Current vs. Supply Voltage
8
Quiescent Current (mA)
100
Group Delay (ns)
100
Small Signal Step Response
0.75
Output Voltage (V)
Output Voltage (V)
Large Signal Step Response
1
10
Frequency (MHz)
50
0
-50
7
6
5
4
-100
0.1
1
10
Frequency (MHz)
SG Micro Corp
www.sg-micro.com
100
3
3.5
4
4.5
Supply Voltage (V)
5
5.5
5
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9114
TYPICAL PERFORMANCE CHARACTERISTICS
At VCC = 5V, TA = +25℃, RL = 150Ω, all outputs AC-coupled, unless otherwise noted.
Gain Error vs. Temperature
1.2
9
1
8
0.8
Gain Error (%)
Quiescent Current (mA)
Quiescent Current vs. Temperature
10
7
6
5
0.6
0.4
0.2
4
0
-40
-15
10
35
Temperature (℃)
60
85
-40
5
1.4
4.75
1.2
4.5
+85℃
4.25
+25℃
4
10
35
Temperature (℃)
60
85
Output Voltage Swing to the Negative Rail vs.
Output Current
Output Voltage (V)
Output Voltage (V)
Output Voltage Swing to the Positive Rail vs.
Output Current
-15
-40℃
3.75
1
-40℃
0.8
+25℃
+85℃
0.6
0.4
0.2
3.5
0
0
20
40
60
Output Current (mA)
SG Micro Corp
www.sg-micro.com
80
100
0
20
40
60
Output Current (mA)
80
100
6
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9114
APPLICATION INFORMATION
Internal Sync Clamp
The SGM9114 low cost, integrated, 5th-order video filter
is intended to replace passive LC filters and drivers in low
voltage portable video applications.
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 SGM9114 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 SGM9114 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 SGM9114 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 SGM9114 well suited for space sensitive
applications such as digital cameras, cellular phones and
other portable devices.
The typical application of the SGM9110 is shown in
Figure 1. 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 SGM9114 has a shutdown feature that disables the
output and reduces the quiescent current to 0.72μA. 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.
VCC = 3.0V to 5.5V
To External Power
Supply or Control I/O
10kΩ
VCC
0.1µF
IN
RIN
CIN
DISABLE
Level
Shifter
5th-Order
Filter
OUT
6dB
ROUT
47µF
75Ω
75Ω
RL
CS
SAG
SGM9114
COUT
22µF
GND
Figure 1. AC-Coupled Input/AC-Coupled Output
SG Micro Corp
www.sg-micro.com
7
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9114
APPLICATION INFORMATION
VCC = 3.0V to 5.5V
To External Power
Supply or Control I/O
10kΩ
VCC
0.1µF
IN
RIN
CIN
DISABLE
Level
Shifter
5th-Order
Filter
OUT
ROUT
75Ω
6dB
75Ω
RL
SAG
SGM9114
GND
Figure 2. AC-Coupled Input/DC-Coupled Output
SAG Correction
Layout and Power-Supply Bypassing
The SGM9114 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 SGM9114 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 SGM9114 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:
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 SGM9114, 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.
SG Micro Corp
www.sg-micro.com
● 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 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.
8
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9114
PACKAGE OUTLINE DIMENSIONS
SOT-23-6
D
e1
e
E
E1
2.59
0.99
b
0.95
0.69
RECOMMENDED LAND PATTERN (Unit: mm)
L
A
A1
θ
A2
Symbol
c
0.2
Dimensions
In Millimeters
MIN
MAX
Dimensions
In Inches
MIN
MAX
A
1.050
1.250
0.041
0.049
A1
0.000
0.100
0.000
0.004
A2
1.050
1.150
0.041
0.045
b
0.300
0.500
0.012
0.020
c
0.100
0.200
0.004
0.008
D
2.820
3.020
0.111
0.119
E
1.500
1.700
0.059
0.067
E1
2.650
2.950
0.104
0.116
e
0.950 BSC
0.037 BSC
e1
1.900 BSC
0.075 BSC
L
0.300
0.600
0.012
0.024
θ
0°
8°
0°
8°
SG Micro Corp
www.sg-micro.com
9
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9114
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
P2
W
P0
Q1
Q2
Q1
Q2
Q1
Q2
Q3
Q4
Q3
Q4
Q3
Q4
B0
Reel Diameter
P1
A0
K0
DIRECTION OF FEED
Reel Width (W1)
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF TAPE AND REEL
Package Type
Reel Diameter
Reel Width
W1
(mm)
A0
(mm)
B0
(mm)
K0
(mm)
P0
(mm)
P1
(mm)
P2
(mm)
W
(mm)
Pin1
Quadrant
SOT-23-6
7″
9.5
3.17
3.23
1.37
4.0
4.0
2.0
8.0
Q3
SG Micro Corp
www.sg-micro.com
10
8MHz, 5th-Order Video Driver
with 6dB Gain
SGM9114
CARTON BOX DIMENSIONS
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF CARTON BOX
Reel Type
Length
(mm)
Width
(mm)
Height
(mm)
Pizza/Carton
7″ (Option)
368
227
224
8
7″
442
410
224
18
SG Micro Corp
www.sg-micro.com
11
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising