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Part Number MAX4090

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General Description
The MAX4090 3V/5V, 6dB video buffer with sync-tip
clamp, and low-power shutdown mode is available in
tiny SOT23 and SC70 packages. The MAX4090 is
designed to drive DC-coupled, 150
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 and
SC70 packages and is specified over the extended
-40
°C to +85°C temperature range.
Applications
Portable Video/Game Systems/DVD Players
Digital Camcorders/Televisions/Still Cameras
PDAs
Video-Enabled Cell Phones
Notebook Computers
Portable/Flat-Panel Displays
Features
Single-Supply Operation from 2.7V to 5.5V
 Input Sync-Tip Clamp
 DC-Coupled Output
 Low-Power Shutdown Mode Reduces Supply
Current to 150nA
Available in Space-Saving SOT23 and SC70
Packages
MAX4090
3V/5V, 6dB Video Buffer with Sync-Tip Clamp
and 150nA Shutdown Current
________________________________________________________________ Maxim Integrated Products
1
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX4090EXT-T
-40°C to +85°C
6 SC70-6
ABM
MAX4090EUT-T
-40°C to +85°C
6 SOT23-6
ABOX
Ordering Information
GND
V
CC
IN
1
6
FB
5
SHDN
OUT
MAX4090
SC70/SOT23
TOP VIEW
2
3
4
Pin Configuration
19-2813; Rev 2; 8/04
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.
MAX4090
CLAMP
1.2k
2.3k
580
780
IN
OUT
FB
SHDN
GND
V
CC
TOP VIEW
Block Diagram
MAX4090
3V/5V, 6dB Video Buffer with Sync-Tip Clamp
and 150nA Shutdown Current
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 2)
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.
Note 1: V
CLP
is the input clamp voltage as defined in the DC Electrical Characteristics table.
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
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
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage Range
V
CC
Guaranteed by PSRR
2.7
5.5
V
V
CC
= 3V
6.5
10
Quiescent Supply Current
I
CC
V
IN
= V
CLP
V
CC
= 5V
6.5
10
mA
Shutdown Supply Current
I
SHDN
SHDN = 0V
0.15
1
µA
Input Clamp Voltage
V
CLP
Input referred
0.27
0.38
0.47
V
Input Voltage Range
V
IN
Inferred from voltage gain (Note 3)
V
CLP
1.45
V
Input Bias Current
I
BIAS
V
IN
= 1.45V
22.5
35
µA
Input Resistance
V
CLP
+ 0.5V < V
IN
< V
CLP
+ 1V
3
M
Voltage Gain
A
V
R
L
= 150
, 0.5V < V
IN
< 1.45V (Note 4)
1.9
2
2.1
V/V
Power-Supply Rejection Ratio
PSRR
2.7V < V
CC
< 5.5V
60
80
dB
V
CC
= 3V
2.55
2.7
Output Voltage High Swing
V
OH
R
L
= 150
to GND
V
CC
= 5V
4.3
4.6
V
Output Voltage Low Swing
V
OL
R
L
= 150
to GND
V
CLP
0.47
V
Sourcing, R
L
= 20
to GND
45
85
Output Current
I
OUT
Sinking, R
L
= 20
to V
CC
40
85
mA
Output Short-Circuit Current
I
SC
OUT shorted to V
CC
or GND
110
mA
SHDN Logic-Low Threshold
V
IL
V
CC
x 0.3
V
SHDN Logic-High Threshold
V
IH
V
CC
x 0.7
V
SHDN Input Current
I
IH
0.003
1
µA
At DC
4
Shutdown Output Impedance
R
OUT
(Disabled)
SHDN = 0V
At 3.58MHz or
4.43MHz
2
k
MAX4090
3V/5V, 6dB Video Buffer with Sync-Tip Clamp
and 150nA Shutdown Current
_______________________________________________________________________________________
3
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.
AC ELECTRICAL CHARACTERISTICS
(V
CC
= 3.0V, GND = 0V, FB shorted to OUT, C
IN
= 0.1µF, R
IN
= 75
to GND, R
L
= 150
to GND, SHDN = V
CC
, T
A
= +25°C, unless
otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Small-Signal -3dB Bandwidth
BW
SS
V
OUT
= 100mV
P-P
55
MHz
Large-Signal -3dB Bandwidth
BW
LS
V
OUT
= 2V
P-P
45
MHz
Small-Signal 0.1dB Gain Flatness
BW
0.1dBSS
V
OUT
= 100mV
P-P
25
MHz
Large-Signal 0.1dB Gain Flatness
BW
0.1dBLS
V
OUT
= 2V
P-P
17
MHz
Slew Rate
SR
V
OUT
= 2V step
275
V/µs
Settling Time to 0.1%
t
S
V
OUT
= 2V step
25
ns
Power-Supply Rejection Ratio
PSRR
f = 100kHz
50
dB
Output Impedance
Z
OUT
f = 5MHz
2.5
V
CC
= 3V
1
Differential Gain
DG
NTSC
V
CC
= 5V
0.5
%
V
CC
= 3V
0.8
Differential Phase
DP
NTSC
V
CC
= 5V
0.5
Degrees
Group Delay
D/dT
f = 3.58MHz or 4.43MHz
20
ns
Peak Signal to RMS Noise
SNR
V
IN
= 1V
P-P
, 10MHz BW
65
dB
Droop
C
IN
= 0.1µF (Note 4)
2
3
%
SHDN Enable Time
t
ON
V
IN
= V
CLP
+ 1V, SHDN = 3V, V
OUT
settled
to within 1% of the final voltage
250
ns
SHDN Disable Time
t
OFF
V
IN
= V
CLP
+ 1V, SHDN = 0V, V
OUT
settled
to below 1% of the output voltage
50
ns
MAX4090
3V/5V, 6dB Video Buffer with Sync-Tip Clamp
and 150nA Shutdown Current
4
_______________________________________________________________________________________
Typical Operating Characteristics
(V
CC
= 3.0V, GND = 0V, FB shorted to OUT, C
IN
= 0.1µF, R
IN
= 75
to GND, R
L
= 150
to GND, SHDN = V
CC
, T
A
= +25°C, unless
otherwise noted.)
SMALL-SIGNAL GAIN
vs. FREQUENCY
MAX4090 toc01
FREQUENCY (Hz)
GAIN (dB)
10M
1M
-5
-4
-3
-2
-1
0
1
2
3
-6
100k
100M
A
V
= 2
V
CC
= 3V
V
OUT
= 100mV
P-P
SMALL-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4090 toc02
FREQUENCY (Hz)
GAIN (dB)
10M
1M
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
-0.6
100k
100M
A
V
= 2
V
CC
= 3V
V
OUT
= 100mV
P-P
SMALL-SIGNAL GAIN
vs. FREQUENCY
MAX4090 toc03
FREQUENCY (Hz)
GAIN (dB)
10M
1M
-5
-4
-3
-2
-1
0
1
2
3
-6
100k
100M
A
V
= 2
V
CC
= 5V
V
OUT
= 100mV
P-P
SMALL-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4090 toc04
FREQUENCY (Hz)
GAIN (dB)
10M
1M
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
-0.6
100k
100M
A
V
= 2
V
CC
= 5V
V
OUT
= 100mV
P-P
LARGE-SIGNAL GAIN
vs. FREQUENCY
MAX4090 toc05
FREQUENCY (Hz)
GAIN (dB)
10M
1M
-5
-4
-3
-2
-1
0
1
2
3
-6
100k
100M
A
V
= 2
V
CC
= 3V
V
OUT
= 2V
P-P
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4090 toc06
FREQUENCY (Hz)
GAIN (dB)
10M
1M
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
-0.6
100k
100M
A
V
= 2
V
CC
= 3V
V
OUT
= 2V
P-P
LARGE-SIGNAL GAIN
vs. FREQUENCY
MAX4090 toc07
FREQUENCY (Hz)
GAIN (dB)
10M
1M
-5
-4
-3
-2
-1
0
1
2
3
-6
100k
100M
A
V
= 2
V
CC
= 5V
V
OUT
= 2V
P-P
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4090 toc08
FREQUENCY (Hz)
GAIN (dB)
10M
1M
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
-0.6
100k
100M
A
V
= 2
V
CC
= 5V
V
OUT
= 2V
P-P
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4090 toc09
FREQUENCY (Hz)
PSRR (dB)
10M
1M
100k
-70
-60
-50
-40
-30
-20
-10
0
-80
10k
100M
V
CC
= 3V
MAX4090
3V/5V, 6dB Video Buffer with Sync-Tip Clamp
and 150nA Shutdown Current
_______________________________________________________________________________________
5
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4090 toc10
FREQUENCY (Hz)
PSRR (dB)
10M
1M
100k
-70
-60
-50
-40
-30
-20
-10
0
-80
10k
100M
V
CC
= 5V
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
MAX4090 toc11
TEMPERATURE (
°C)
SUPPLY CURRENT (mA)
75
50
25
0
-25
6.35
6.40
6.45
6.50
6.55
6.60
6.65
6.70
6.75
6.80
6.30
-50
100
V
CC
= 3V
V
CC
= 5V
CLAMP VOLTAGE
vs. TEMPERATURE
MAX4090 toc12
TEMPERATURE (
°C)
V
CLAMP
(V)
75
50
-25
0
25
0.25
0.30
0.35
0.40
0.45
0.50
0.55
0.60
0.20
-50
100
V
CC
= 3V
CLAMP VOLTAGE
vs. TEMPERATURE
MAX4090 toc13
TEMPERATURE (
°C)
V
CLAMP
(V)
75
50
-25
0
25
0.25
0.30
0.35
0.40
0.45
0.50
0.55
0.60
0.20
-50
100
V
CC
= 5V
VOLTAGE GAIN vs. TEMPERATURE
MAX4090 toc14
TEMPERATURE (
°C)
GAIN (V/V)
75
50
25
0
-25
1.95
2.00
2.05
2.10
1.90
-50
100
V
CC
= 3V
VOLTAGE GAIN vs. TEMPERATURE
MAX4090 toc15
TEMPERATURE (
°C)
GAIN (V/V)
75
50
25
0
-25
1.95
2.00
2.05
2.10
1.90
-50
100
V
CC
= 5V
OUTPUT VOLTAGE HIGH SWING
vs. TEMPERATURE
MAX4090 toc16
TEMPERATURE (
°C)
OUTPUT VOLTAGE HIGH (V)
75
50
25
0
-25
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
2.0
-50
100
V
CC
= 3V
OUTPUT VOLTAGE HIGH SWING
vs. TEMPERATURE
MAX4090 toc17
TEMPERATURE (
°C)
OUTPUT VOLTAGE HIGH (V)
75
50
25
0
-25
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.0
4.0
-50
100
V
CC
= 5V
LARGE-SIGNAL PULSE RESPONSE
MAX4090 toc18
V
OUT
1V/div
V
IN
500mV/div
10ns/div
Typical Operating Characteristics (continued)
(V
CC
= 3.0V, GND = 0V, FB shorted to OUT, C
IN
= 0.1µF, R
IN
= 75
to GND, R
L
= 150
to GND, SHDN = V
CC
, T
A
= +25°C, unless
otherwise noted.)