19-2813; Rev 3; 9/05
3V/5V, 6dB Video Buffer with Sync-Tip Clamp
and 150nA Shutdown Current
General Description
The MAX4090 3V/5V, 6dB video buffer with sync-tip
clamp, and low-power shutdown mode is available in
tiny SOT23, SC70, and µDFN packages. The MAX4090
is designed to drive DC-coupled, 150Ω back-terminated
video loads in portable video applications such as digi-
tal still cams, portable DVD players, digital camcorders,
PDAs, video-enabled cell phones, portable game sys-
tems, and notebook computers. The input clamp posi-
tions the video waveform at the output and allows the
MAX4090 to be used as a DC-coupled output driver.
The MAX4090 operates from a single 2.7V to 5.5V sup-
ply and consumes only 6.5mA of supply current. The
low-power shutdown mode reduces the supply current
to 150nA, making the MAX4090 ideal for low-voltage,
battery-powered video applications.
The MAX4090 is available in tiny 6-pin SOT23, SC70,
and µDFN packages and is specified over the extend-
ed (-40°C to +85°C) and automotive (-40°C to +125°C)
temperature ranges.
♦
Input Sync-Tip Clamp
♦
DC-Coupled Output
♦
Low-Power Shutdown Mode Reduces Supply
Current to 150nA
♦
Available in Space-Saving SOT23, SC70 and
µDFN Packages
Features
♦
Single-Supply Operation from 2.7V to 5.5V
MAX4090
Ordering Information
PART
MAX4090EXT-T
MAX4090EUT-T
MAX4090ELT-T*
MAX4090AAXT-T
MAX4090AAUT-T
MAX4090AALT-T*
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
6 SC70-6
6 SOT23-6
6 µDFN-6
TOP
MARK
ABM
ABOX
AAI
ACW
ABWQ
AAN
Applications
Portable Video/Game Systems/DVD Players
Digital Camcorders/Televisions/Still Cameras
PDAs
Video-Enabled Cell Phones
Notebook Computers
Portable/Flat-Panel Displays
-40°C to +125°C 6 SC70-6
-40°C to +125°C 6 SOT23-6
-40°C to +125°C 6 µDFN-6
*Future
product—contact factory for availability.
Pin Configurations
TOP VIEW
V
CC
Block Diagram
FB
OUT
1
6
FB
6
SHDN
5
OUT
4
MAX4090
IN
OUT
CLAMP
2.3kΩ
FB
580Ω
780Ω
1.2kΩ
GND
2
MAX4090
5
SHDN
MAX4090
IN
3
4
V
CC
1
2
GND
3
IN
GND
SHDN
SC70/SOT23
V
CC
µDFN
________________________________________________________________
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.
3V/5V, 6dB Video Buffer with Sync-Tip Clamp
and 150nA Shutdown Current
MAX4090
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ............................................................. -0.3V to +6V
OUT, FB,
SHDN
to GND............................ -0.3V to (V
CC
+ 0.3V)
IN to GND (Note 1) ................................... V
CLP
to (V
CC
+ 0.3V)
IN Short-Circuit Duration from -0.3V to V
CLP
........................1min
Output Short-Circuit Duration to V
CC
or GND .......... Continuous
Continuous Power Dissipation (T
A
= +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C) ...........695mW
6-Pin SC70 (derate 3.1mW/°C above +70°C) .............245mW
6-Pin µDFN (derate 3.6mW/°C above +70°C) ..............290mW
Operating Temperature Range
MAX4090E .......................................................-40°C to +85°C
MAX4090A .....................................................-40°C to +125°C
Junction Temperature .....................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
Note 1:
V
CLP
is the input clamp voltage as defined in the
DC Electrical Characteristics
table.
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.
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 3.0V, GND = 0V, C
IN
= 0.1µF from IN to GND, R
L
= infinity to GND, FB shorted to OUT,
SHDN
= 3.0V, T
A
= -40°C to +85°C
(MAX4090E), T
A
= -40°C to +125°C (MAX4090A). Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 2)
PARAMETER
Supply Voltage Range
Quiescent Supply Current
Shutdown Supply Current
Input Clamp Voltage
Input Voltage Range
Input Bias Current
Input Resistance
Voltage Gain
Power-Supply Rejection Ratio
Output-Voltage High Swing
Output-Voltage Low Swing
Output Current
Output Short-Circuit Current
SHDN
Logic-Low Threshold
SHDN
Logic-High Threshold
SHDN
Input Current
Shutdown Output Impedance
A
V
PSRR
V
OH
V
OL
I
OUT
I
SC
V
IL
V
IH
I
IH
At DC
R
OUT
(Disabled)
SYMBOL
V
CC
I
CC
I
SHDN
V
CLP
V
IN
I
BIAS
CONDITIONS
Guaranteed by PSRR
V
IN
= V
CLP
SHDN
= 0V
Input referred
Inferred from voltage gain (Note 3)
V
IN
= 1.45V
V
CLP
+ 0.5V < V
IN
< V
CLP
+ 1V
R
L
= 150Ω, 0.5V < V
IN
< 1.45V (Note 4)
2.7V < V
CC
< 5.5V
R
L
= 150Ω to GND
R
L
= 150Ω to GND
Sourcing, R
L
= 20Ω to GND
Sinking, R
L
= 20Ω to V
CC
OUT shorted to V
CC
or GND
V
CC
= 3V
V
CC
= 5V
V
CC
= 3V
V
CC
= 5V
MIN
2.7
TYP
6.5
6.5
0.15
MAX
5.5
10
10
1
0.47
1.45
35
2.1
UNITS
V
mA
µA
V
V
µA
MΩ
V/V
dB
V
0.27
V
CLP
0.38
22.5
3
1.9
60
2.55
4.3
45
40
2
80
2.7
4.6
V
CLP
85
85
110
0.47
V
mA
mA
V
CC
x 0.3
V
CC
x 0.7
0.003
4
2
SHDN
= 0V
At 3.58MHz or
4.43MHz
1
V
V
µA
kΩ
2
_______________________________________________________________________________________
3V/5V, 6dB Video Buffer with Sync-Tip Clamp
and 150nA Shutdown Current
AC ELECTRICAL CHARACTERISTICS
(V
CC
= 3.0V, GND = 0V, FB shorted to OUT, C
IN
= 0.1µF, R
IN
= 75Ω to GND, R
L
= 150Ω to GND,
SHDN
= V
CC
, T
A
= +25°C, unless
otherwise noted.)
PARAMETER
Small-Signal -3dB Bandwidth
Large-Signal -3dB Bandwidth
Small-Signal 0.1dB Gain Flatness
Large-Signal 0.1dB Gain Flatness
Slew Rate
Settling Time to 0.1%
Power-Supply Rejection Ratio
Output Impedance
Differential Gain
Differential Phase
Group Delay
Peak Signal to RMS Noise
Droop
SHDN
Enable Time
SHDN
Disable Time
t
ON
t
OFF
SYMBOL
BW
SS
BW
LS
V
OUT
= 2V
P-P
CONDITIONS
V
OUT
= 100mV
P-P
MIN
TYP
55
45
25
17
275
25
50
2.5
V
CC
= 3V
V
CC
= 5V
V
CC
= 3V
V
CC
= 5V
1
0.5
0.8
0.5
20
65
2
250
50
3
MAX
UNITS
MHz
MHz
MHz
MHz
V/µs
ns
dB
Ω
%
Degrees
ns
dB
%
ns
ns
MAX4090
BW
0.1dBSS
V
OUT
= 100mV
P-P
BW
0.1dBLS
V
OUT
= 2V
P-P
SR
t
S
PSRR
Z
OUT
DG
DP
D/dT
SNR
V
OUT
= 2V step
V
OUT
= 2V step
f = 100kHz
f = 5MHz
NTSC
NTSC
f = 3.58MHz or 4.43MHz
V
IN
= 1V
P-P
, 10MHz BW
C
IN
= 0.1µF (Note 4)
V
IN
= V
CLP
+ 1V,
SHDN
= 3V, V
OUT
settled
to within 1% of the final voltage
V
IN
= V
CLP
+ 1V,
SHDN
= 0V, V
OUT
settled
to below 1% of the output voltage
Note 2:
All devices are 100% production tested at T
A
= +25°C. Specifications over temperature limits are guaranteed by design.
Note 3:
Voltage gain (A
V
) is referenced to the clamp voltage, i.e., an input voltage of V
IN
= V
CLP
+ VI would produce an output volt-
age of V
OUT
= V
CLP
+ A
V
x VI.
Note 4:
Droop is guaranteed by the Input Bias Current specification.
_______________________________________________________________________________________
3
3V/5V, 6dB Video Buffer with Sync-Tip Clamp
and 150nA Shutdown Current
MAX4090
Typical Operating Characteristics
(V
CC
= 3.0V, GND = 0V, FB shorted to OUT, C
IN
= 0.1µF, R
IN
= 75Ω to GND, R
L
= 150Ω to GND,
SHDN
= V
CC
, T
A
= +25°C, unless
otherwise noted.)
SMALL-SIGNAL GAIN
vs. FREQUENCY
MAX4090 toc01
SMALL-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4090 toc02
SMALL-SIGNAL GAIN
vs. FREQUENCY
2
1
0
GAIN (dB)
-1
-2
-3
MAX4090 toc03
3
2
1
0
GAIN (dB)
-1
-2
-3
-4
-5
-6
A
V
= 2
V
CC
= 3V
V
OUT
= 100mV
P-P
100k
1M
10M
0.3
0.2
0.1
0
GAIN (dB)
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
A
V
= 2
V
CC
= 3V
V
OUT
= 100mV
P-P
100k
1M
10M
3
-4
-5
-6
100M
A
V
= 2
V
CC
= 5V
V
OUT
= 100mV
P-P
100k
1M
10M
100M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
SMALL-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4090 toc04
LARGE-SIGNAL GAIN
vs. FREQUENCY
MAX4090 toc05
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
0.2
0.1
0
GAIN (dB)
-0.1
-0.2
-0.3
MAX4090 toc06
0.3
0.2
0.1
0
GAIN (dB)
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
A
V
= 2
V
CC
= 5V
V
OUT
= 100mV
P-P
100k
1M
10M
3
2
1
0
GAIN (dB)
-1
-2
-3
-4
-5
-6
A
V
= 2
V
CC
= 3V
V
OUT
= 2V
P-P
100k
1M
10M
0.3
-0.4
-0.5
-0.6
100M
FREQUENCY (Hz)
A
V
= 2
V
CC
= 3V
V
OUT
= 2V
P-P
100k
1M
10M
100M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
LARGE-SIGNAL GAIN
vs. FREQUENCY
MAX4090 toc07
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4090 toc08
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
V
CC
= 3V
-10
-20
PSRR (dB)
-30
-40
-50
-60
MAX4090 toc09
3
2
1
0
GAIN (dB)
-1
-2
-3
-4
-5
-6
A
V
= 2
V
CC
= 5V
V
OUT
= 2V
P-P
100k
1M
10M
0.3
0.2
0.1
0
GAIN (dB)
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
A
V
= 2
V
CC
= 5V
V
OUT
= 2V
P-P
100k
1M
10M
0
-70
-80
100M
10k
100k
1M
FREQUENCY (Hz)
10M
100M
FREQUENCY (Hz)
100M
FREQUENCY (Hz)
4
_______________________________________________________________________________________
3V/5V, 6dB Video Buffer with Sync-Tip Clamp
and 150nA Shutdown Current
MAX4090
Typical Operating Characteristics (continued)
(V
CC
= 3.0V, GND = 0V, FB shorted to OUT, C
IN
= 0.1µF, R
IN
= 75Ω to GND, R
L
= 150Ω to GND,
SHDN
= V
CC
, T
A
= +25°C, unless
otherwise noted.)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4090 toc10
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
MAX4090 toc11
CLAMP VOLTAGE
vs. TEMPERATURE
0.55
0.50
V
CLAMP
(V)
MAX4090 toc12
0
-10
-20
PSRR (dB)
-30
-40
-50
-60
-70
-80
10k
100k
1M
FREQUENCY (Hz)
10M
V
CC
= 5V
6.8
6.7
SUPPLY CURRENT (mA)
6.6
V
CC
= 5V
6.5
6.4
6.3
6.2
6.1
V
CC
= 3V
0.60
0.45
0.40
0.35
0.30
0.25
0.20
100M
-40 -20
0
20
40
60
80 100 120 140
-40 -20
0
20
40
60
80 100 120 140
TEMPERATURE (°C)
TEMPERATURE (°C)
VOLTAGE GAIN
vs. TEMPERATURE
MAX4090 toc13
OUTPUT-VOLTAGE HIGH SWING
vs. TEMPERATURE
2.9
OUTPUT-VOLTAGE HIGH (V)
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
V
CC
= 3V
MAX4090 toc14
2.10
3.0
2.05
GAIN (V/V)
2.00
1.95
1.90
-40 -20
0
20
40
60
80 100 120 140
TEMPERATURE (°C)
2.0
-40 -20
0
20
40
60
80 100 120 140
TEMPERATURE (°C)
OUTPUT-VOLTAGE HIGH SWING
vs. TEMPERATURE
4.9
OUTPUT-VOLTAGE HIGH (V)
4.8
4.7
4.6
4.5
4.4
4.3
4.2
4.1
4.0
-40 -20
0
20
40
60
80 100 120 140
V
OUT
1V/div
V
CC
= 5V
MAX4090 toc15
LARGE-SIGNAL PULSE RESPONSE
MAX4090 toc16
5.0
V
IN
500mV/div
10ns/div
TEMPERATURE (°C)
_______________________________________________________________________________________
5
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