19-3021; Rev 0; 10/03
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
General Description
The MAX4032 5V, 6dB video buffer with sync-tip clamp,
output sag correction, and low-power shutdown mode
is available in tiny SOT23 and SC70 packages. The
sag-corrected output of the MAX4032 is designed to
drive AC-coupled, 150Ω back-terminated video loads
in portable video applications such as digital still cams,
portable DVD players, digital camcorders, PDAs, video-
enabled cell phones, portable game systems, and
notebook computers. The sag correction feature intro-
duces low-frequency compensation that reduces the
value of the normally bulky and expensive 330µF AC-
coupling capacitor to two small, less expensive 22µF
capacitors. The input clamp positions the video wave-
form at the output and allows the MAX4032 to be used
as either an AC- or DC-coupled output driver.
The MAX4032 operates from a single +5V supply and
consumes only 6.5mA of supply current. The low-power
shutdown mode reduces the supply current to 150nA,
making the MAX4032 ideal for low-voltage, battery-
powered video applications.
The MAX4032 is available in tiny 6-pin SOT23 and
SC70 packages and is specified over the extended
-40°C to +85°C temperature range.
o
Single +5V Operation
o
Input Sync-Tip Clamp
o
AC- or DC-Coupled Output
o
Low-Power Shutdown Mode Reduces Supply
Current to 150nA
o
SAG Correction Reduces Output-Coupling
Capacitors from 330µF to 22µF
o
Available in Space-Saving SOT23 and SC70
Packages
Features
MAX4032
Ordering Information
PART
MAX4032EXT-T
MAX4032EUT-T
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
6 SC70-6
6 SOT23-6
TOP
MARK
ACC
ABSP
Applications
Portable Video/Game Systems/DVD Players
Digital Camcorders/Televisions/Still Cameras
PDAs
Video-Enabled Cell Phones
Notebook Computers
Portable/Flat-Panel Displays
TOP VIEW
V
CC
Block Diagram
Pin Configuration
TOP VIEW
OUT
1
6
SAG
MAX4032
IN
OUT
CLAMP
2.3kΩ
SAG
GND
2
MAX4032
580Ω
5
SHDN
1.2kΩ
780Ω
SHDN
IN
3
4
V
CC
GND
SC70/SOT23
________________________________________________________________
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.
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
MAX4032
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ............................................................. -0.3V to +6V
OUT, SAG,
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
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
= 5.0V, GND = 0V, C
IN
= 0.1µF from IN to GND, R
L
= infinity to GND, SAG shorted to OUT,
SHDN
= 5.0V, T
A
= -40°C to +85°C.
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
, I
IL
At DC
R
OUT
(Disabled)
SYMBOL
V
CC
I
CC
I
SHDN
V
CLP
V
IN
I
BIAS
V
IN
= V
CLP
SHDN
= 0V
Input referred
CONDITIONS
Guaranteed by PSRR
MIN
4.5
TYP
6.5
0.15
MAX
5.5
10
1
0.47
1.45
35
UNITS
V
mA
µA
V
V
µA
MΩ
0.27
V
CLP
0.38
22.5
3
Inferred from voltage gain (Note 3)
V
IN
= 1.45V
V
CLP
+ 0.5V < V
IN
< V
CLP
+ 1V
R
L
= 150Ω to GND, 0.5V < V
IN
< 1.45V
(Note 4)
4.5V < 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
1.9
60
4.3
45
40
2
80
4.6
V
CLP
85
85
110
2.1
V/V
dB
V
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
_______________________________________________________________________________________
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
AC ELECTRICAL CHARACTERISTICS
(V
CC
= 5.0V, GND = 0V, C
OUT
= C
SAG
= 22µF, C
IN
= 0.1µF, R
IN
= 75Ω to GND, R
L
= 150Ω to GND,
SHDN
= 5.0V, 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
18
17
275
25
50
2.5
0.4
0.6
20
65
2
250
50
3
MAX
UNITS
MHz
MHz
MHz
MHz
V/µs
ns
dB
Ω
%
Degrees
ns
dB
%
ns
ns
MAX4032
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
= 5V, 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
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
MAX4032
Typical Operating Characteristics
(V
CC
= 5.0V, GND = 0V, C
OUT
= C
SAG
= 22µF, 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
MAX4032 toc01
SMALL-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4032 toc02
LARGE-SIGNAL GAIN
vs. FREQUENCY
2
1
0
GAIN (dB)
-1
-2
-3
-4
MAX4032 toc03
3
2
1
0
GAIN (dB)
-1
-2
-3
-4
-5
-6
100k
1M
10M
A
V
= 2
V
OUT
= 100mV
P-P
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
OUT
= 100mV
P-P
100k
1M
10M
3
-5
-6
100M
A
V
= 2
V
OUT
= 2V
P-P
100k
1M
10M
100M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4032 toc04
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4032 toc05
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
6.75
6.70
SUPPLY CURRENT (mA)
6.65
6.60
6.55
6.50
6.45
6.40
6.35
6.30
MAX4032 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
OUT
= 2V
P-P
100k
1M
10M
0
-10
-20
PSRR (dB)
-30
-40
-50
-60
-70
-80
10k
100k
1M
FREQUENCY (Hz)
10M
6.80
100M
100M
-50
-25
0
25
50
75
100
FREQUENCY (Hz)
TEMPERATURE (°C)
CLAMP VOLTAGE
vs. TEMPERATURE
MAX4032 toc07
VOLTAGE GAIN vs. TEMPERATURE
MAX4032 toc08
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
MAX4032 toc09
0.60
0.55
0.50
V
CLAMP
(V)
2.10
5.0
2.05
GAIN (V/V)
0.45
0.40
0.35
0.30
0.25
0.20
-50
-25
0
25
50
75
100
TEMPERATURE (°C)
2.00
1.95
1.90
-50
-25
0
25
50
75
100
TEMPERATURE (°C)
4.0
-50
-25
0
25
50
75
100
TEMPERATURE (°C)
4
_______________________________________________________________________________________
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
Typical Operating Characteristics (continued)
(V
CC
= 5.0V, GND = 0V, C
OUT
= C
SAG
= 22µF, C
IN
= 0.1µF, R
IN
= 75Ω to GND, R
L
= 150Ω to GND,
SHDN
= V
CC
, T
A
= +25°C,
unless otherwise noted.)
MAX4032
LARGE-SIGNAL PULSE RESPONSE
MAX4032 toc10
SMALL-SIGNAL PULSE RESPONSE
MAX4032 toc11
DIFFERENTIAL GAIN AND PHASE
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
1.0
0.8
0.6
0.4
0.2
0
-0.2
DIFFERENTIAL
GAIN (%)
MAX4032 toc12
V
IN
500mV/div
V
IN
25mV/div
0
1
2
3
4
5
6
V
OUT
1V/div
V
OUT
50mV/div
DIFFERENTIAL
PHASE (°)
10ns/div
10ns/div
0
1
2
3
4
5
6
Pin Description
PIN
1
2
3
4
NAME
OUT
GND
IN
V
CC
Video Output
Ground
Video Input
Power-Supply Voltage. Bypass with a 0.1µF
capacitor to ground as close to the pin as
possible.
Shutdown. Pull
SHDN
low to place the
MAX4032 in low-power shutdown mode.
Sag Correction
IN
Typical Application Circuit
V
CC
FUNCTION
MAX4032
C
OUT
OUT
R
IN
CLAMP
R
L
5
6
SHDN
SAG
C
SAG
SAG
SHDN
GND
_______________________________________________________________________________________
5
RF/无线
