19-3676; Rev 1; 8/05
IT
TION K
VALUA
E
BLE
AVAILA
DirectDrive Video Amplifier with
Reconstruction Filter
General Description
Features
♦
DC-Coupled Output
♦
Direct Connection to Video DAC
♦
Video Output Black Level Set to Ground
♦
Video Reconstruction Filter with 50dB
Attenuation at 27MHz
♦
Preset Gain
6dB (MAX9503G)
12dB (MAX9503M)
♦
10nA Shutdown Supply Current
♦
2.7V to 3.6V Single-Supply Operation
MAX9503
The MAX9503 filters and amplifies standard-definition
video signals. Maxim’s DirectDrive™ technology elimi-
nates large output-coupling capacitors and sets the
video black level to ground. The input of the MAX9503
can be directly connected to the output of a video
digital-to-analog converter (DAC). The MAX9503 pro-
vides a compact, integrated, and low-power solution.
An internal reconstruction filter smoothes the steps and
reduces the spikes on the video signal from the DAC.
The reconstruction filter typically has 3dB attenuation at
9MHz and 50dB attenuation at 27MHz, and ±1dB pass-
band flatness to 5.5MHz.
Maxim’s DirectDrive uses an integrated charge pump
and a linear regulator to create a clean negative power
supply to drive the sync below ground. The charge
pump injects so little noise into the video output that the
picture is visibly flawless.
The MAX9503 is available with +6dB (MAX9503G) and
+12dB (MAX9503M) gains. The device operates from a
2.7V to 3.6V single supply and features a 10nA low-
power shutdown mode.
The MAX9503 is offered in space-saving 16-pin QSOP
and 16-pin TQFN packages and is specified over the
-40°C to +85°C extended temperature range.
Ordering Information
PART*
MAX9503GEEE
MAX9503GETE
MAX9503MEEE
PIN-
PACKAGE
16 QSOP
16 TQFN
16 QSOP
PKG CODE
E16-4
T1633-4
E16-4
TOP MARK
—
ACU
—
Applications
Digital Still Cameras
Mobile Phones/Smartphones
Security Cameras
Portable Media Players
Space-Constrained, Low-Power Portable
Devices
MAX9503METE 16 TQFN
T1633-4
ACV
*All
devices are specified over the -40°C to +85°C operating
temperature range.
Functional Diagram/Typical Operating Circuit and Pin
Configurations appear at end of data sheet.
Block Diagram
-0.1V TO
+0.1V
0V
LOWPASS
FILTER
AMP
LINEAR
REGULATOR
CHARGE
PUMP
VIDOUT
0 TO 50mV
0V
VIDIN
BUFFER
MAX9503
MAX9503G: 6dB
MAX9503M: 12dB
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
DirectDrive Video Amplifier with
Reconstruction Filter
MAX9503
ABSOLUTE MAXIMUM RATINGS
V
DD
to SGND............................................................-0.3V to +4V
VIDIN to SGND .........................................................-0.3V to +4V
BIAS to SGND ............................................-0.3V to (V
DD
+ 0.3V)
SHDN
to SGND ........................................................-0.3V to +4V
VIDOUT to SGND........................(The greater of V
SS
and -2V) to
(V
DD
+ 0.3V)
CPV
DD
to CPGND ....................................................-0.3V to +4V
C1P, C1N, CPV
SS
.............................Capacitor Connection Only
CPGND, SGND, GND............................................-0.1V to +0.1V
CPV
SS
to V
SS ..................................................................
-0.1V to +0.1V
VIDOUT Short Circuit to V
DD
, SGND
and the Greater of (V
SS
and -2V) ...........................Continuous
Continuous Current
VIDIN, BIAS,
SHDN
......................................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
16-Pin TQFN (derate 15.6mW/°C above +70°C) .......1349mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
ELECTRICAL CHARACTERISTICS
(V
DD
= CPV
DD
=
SHDN
= 3.0V, SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1µF, R
BIAS
= 100kΩ, T
A
= T
MIN
to T
MAX
.
R
L
= 150Ω to SGND, unless otherwise noted. V
VIDIN
= 286mV (MAX9503G), V
VIDIN
= 143mV (MAX9503M). Typical values are at
V
DD
= CPV
DD
=
SHDN
= 3.0V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Supply Voltage Range
Quiescent Supply Current
Shutdown Supply Current
Bias Voltage
VIDEO AMPLIFIER
Guaranteed by DC
voltage gain, V
DD
= 2.7V
Guaranteed by DC
voltage gain, V
DD
= 3V
V
DD
= 2.7V
MAX9503G
DC Voltage Gain (Note 2)
A
V
V
DD
= 2.7V to 3.6V
MAX9503M
MAX9503G
MAX9503M
MAX9503G
MAX9503M
MAX9503G
MAX9503M
-0.10
-0.050
-0.10
-0.05
-2.5
1
5.5
11.5
-0.1
-0.15
2.162
2.594
50
0.01
0.02
MAX9503G
MAX9503M
4.2
8.2
6
12
0
0
6.5
12.5
+0.1
+0.15
dB
+1.05
+0.525
+1.28
+0.64
+2.5
µA
MΩ
V
SYMBOL
V
DD
,
CPV
DD
I
DD
I
SHDN
V
BIAS
CONDITIONS
Guaranteed by DC voltage gain and
quiescent current
V
DD
= 3.6V (I
DD
= I
VDD
+ I
CPVDD
, R
L
=
∞)
V
DD
= 3.6V (I
SHDN
= I
VDD
+ I
CPVDD
),
SHDN
= SGND
MIN
2.7
12
0.01
1
TYP
MAX
3.6
15
1
UNITS
V
mA
µA
V
Input Voltage Range
V
RANGE
Input Current
Input Resistance
I
IN
R
IN
Output Black Level (Note 3)
Output Voltage Swing
Output Short-Circuit Current
Output Resistance
Shutdown Output Impedance
I
SC
R
OUT
V
DD
= 2.7V
V
V
P-P
mA
Ω
kΩ
Guaranteed by DC voltage gain, V
DD
= 2.7V
Guaranteed by DC voltage gain, V
DD
= 3V
Sinking or sourcing
MAX9503G
MAX9503M
R
OUTSHDN
SHDN
= SGND
2
_______________________________________________________________________________________
DirectDrive Video Amplifier with
Reconstruction Filter
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= CPV
DD
=
SHDN
= 3.0V, SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1µF, R
BIAS
= 100kΩ, T
A
= T
MIN
to T
MAX
.
R
L
= 150Ω to SGND, unless otherwise noted. V
VIDIN
= 286mV (MAX9503G), V
VIDIN
= 143mV (MAX9503M). Typical values are at
V
DD
= CPV
DD
=
SHDN
= 3.0V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
CHARGE PUMP
Switching Frequency
LOGIC SIGNALS
Logic-Low Threshold
Logic-High Threshold
Logic Input Current
V
IL
V
IH
I
IL
V
DD
= 2.7V to 3.6V
V
DD
= 2.7V to 3.6V
1.5
1
0.5
V
V
µA
150
250
300
kHz
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX9503
AC ELECTRICAL CHARACTERISTICS
(V
DD
= CPV
DD
=
SHDN
= 3.0V, SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1µF, R
BIAS
= 100kΩ, T
A
= T
MIN
to T
MAX
. R
L
=
150Ω to SGND, unless otherwise noted. V
VIDIN
= 286mV (MAX9503G), V
VIDIN
= 143mV (MAX9503M). Typical values are at V
DD
=
CPV
DD
=
SHDN
= 3.0V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Passband Flatness
Attenuation
SYMBOL
CONDITIONS
V
DD
= 2.7V, f = 100kHz to 5.5MHz
V
DD
= 2.7V,
VIDOUT= 2V
P-P
, attenuation
is referred to 100kHz
PSRR
Z
OUT
DG
DP
f = 100kHz
f = 5MHz
NTSC, VIDOUT = 2V
P-P
NTSC, VIDOUT = 2V
P-P
f = 9.1MHz
f = 27MHz
MAX9503G
MAX9503M
MAX9503G
MAX9503M
MAX9503G
MAX9503M
MAX9503G
MAX9503M
35
MIN
-1
TYP
0
3
dB
50
62
56
0.5
0.65
0.1
0.1
0.2
0.2
-0.3
0.3
0.7
0.2
10
20
dB
Ω
%
Degrees
MAX
+1
UNITS
dB
Power-Supply Rejection Ratio
Output Impedance
Differential Gain Error
Differential Phase Error
2T Pulse-to-Bar K Rating
2T Pulse Response
2T Bar Response
Nonlinearity
Group-Delay Distortion
VIDOUT Capacitive-Load Stability
D
Dt
C
L
2T = 250ns, bar time is 18µs, the beginning
2.5% and the ending 2.5% of the bar time
are ignored
2T = 250ns
2T = 250ns, bar time is 18µs, the beginning
2.5% and the ending 2.5% of the bar time
are ignored
5-step staircase
100kHz to 5.5MHz
V
OUT
= 2V
P-P
, no sustained oscillations
K%
K%
K%
%
ns
pF
_______________________________________________________________________________________
3
DirectDrive Video Amplifier with
Reconstruction Filter
MAX9503
AC ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= CPV
DD
=
SHDN
= 3.0V, SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1µF, R
BIAS
= 100kΩ, T
A
= T
MIN
to T
MAX
. R
L
=
150Ω to SGND, unless otherwise noted. V
VIDIN
= 286mV (MAX9503G), V
VIDIN
= 143mV (MAX9503M). Typical values are at V
DD
=
CPV
DD
=
SHDN
= 3.0V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Peak Signal-to-RMS Noise
Enable Time
Disable Time
SYMBOL
SNR
t
ON
t
OFF
CONDITIONS
100kHz to 5.5MHz
MAX9503G
MAX9503M
MIN
TYP
64
58
0.2
0.1
MAX
UNITS
dB
ms
ms
VIDIN = 0.5V, VIDOUT settled to within 1%
of the final voltage
VIDIN = 0.5V, VIDOUT settled to below 1%
of the output voltage
Note 1:
All devices are 100% production tested at T
A
= +25°C. Specifications over temperature are guaranteed by design.
Note 2:
Voltage gain (A
V
) is a two-point measurement in which the output voltage swing is divided by the input voltage swing.
Note 3:
With an output load attached, this offset will directly contribute to quiescent current.
Typical Operating Characteristics
(V
DD
= CPV
DD
=
SHDN
= 3.0V, SGND = GND = CPGND = 0V, no load, C1 = C2 = C3 = C4 = 1µF, R
BIAS
= 100kΩ, T
A
= T
MIN
to
T
MAX
. R
IN
= 150Ω to SGND, unless otherwise noted. V
VIDIN
= 286mV (MAX9503G), V
VIDIN
= 143mV (MAX9503M). Typical values
are at T
A
= +25°C, unless otherwise noted.)
MAX9503G
SMALL-SIGNAL GAIN vs. FREQUENCY
MAX9503 toc01
MAX9503M
SMALL-SIGNAL GAIN vs. FREQUENCY
MAX9503 toc02
MAX9503G SMALL-SIGNAL
GAIN FLATNESS vs. FREQUENCY
V
VIDOUT
= 100mV
P-P
GAIN = 6dB
7
GAIN FLATNESS (dB)
MAX9503 toc03
20
10
0
-10
GAIN (dB)
20
10
0
-10
GAIN (dB)
-20
-30
-40
-50
-60
8
-20
-30
-40
-50
-60
-70
-80
0.1
1
10
100
FREQUENCY (MHz)
V
VIDOUT
= 100mV
P-P
GAIN = 6dB
6
5
4
V
VIDOUT
= 100mV
P-P
GAIN = 12dB
3
0.1
1
10
100
0.1
1
FREQUENCY (MHz)
10
FREQUENCY (MHz)
-70
-80
4
_______________________________________________________________________________________
DirectDrive Video Amplifier with
Reconstruction Filter
MAX9503
Typical Operating Characteristics (continued)
(V
DD
= CPV
DD
=
SHDN
= 3.0V, SGND = GND = CPGND = 0V, no load, C1 = C2 = C3 = C4 = 1µF, R
BIAS
= 100kΩ, T
A
= T
MIN
to
T
MAX
. R
IN
= 150Ω to SGND, unless otherwise noted. V
VIDIN
= 286mV (MAX9503G), V
VIDIN
= 143mV (MAX9503M). Typical values
are at T
A
= +25°C, unless otherwise noted.)
MAX9503M SMALL-SIGNAL
GAIN FLATNESS vs. FREQUENCY
V
VIDOUT
= 100mV
P-P
GAIN = 12dB
MAX9503 toc04
MAX9503G
LARGE-SIGNAL GAIN vs. FREQUENCY
MAX9503 toc05
MAX9503M
LARGE-SIGNAL GAIN vs. FREQUENCY
10
0
-10
GAIN (dB)
-20
-30
-40
-50
-60
MAX9503 toc06
15
14
GAIN FLATNESS (dB)
13
20
10
0
-10
GAIN (dB)
-20
-30
-40
-50
-60
-70
V
VIDOUT
= 2V
P-P
GAIN = 6dB
0.1
1
10
20
12
11
10
9
0.1
1
FREQUENCY (MHz)
10
-70
-80
100
0.1
V
VIDOUT
= 2V
P-P
GAIN = 12dB
1
10
100
-80
FREQUENCY (MHz)
FREQUENCY (MHz)
MAX9503G LARGE-SIGNAL
GAIN FLATNESS vs. FREQUENCY
MAX9503 toc07
MAX9503M LARGE-SIGNAL
GAIN FLATNESS vs. FREQUENCY
V
VIDOUT
= 2V
P-P
GAIN = 12dB
13
GAIN FLATNESS (dB)
MAX9503 toc08
8
V
VIDOUT
= 2V
P-P
GAIN = 6dB
7
GAIN FLATNESS (dB)
14
6
12
5
11
4
10
3
0.1
1
FREQUENCY (MHz)
10
9
0.1
1
FREQUENCY (Hz)
10
MAX9503G GROUP DELAY
MAX9503 toc09
MAX9503M GROUP DELAY
V
VIDOUT
= 2V
P-P
125
GROUP DELAY (ns)
100
75
50
25
0
MAX9503 toc10
150
V
VIDOUT
= 2V
P-P
125
GROUP DELAY (ns)
100
75
50
25
0
0.1
1
10
150
100
0.1
1
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
_______________________________________________________________________________________
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
