19-4904; Rev 1; 12/10
TION KIT
EVALUA BLE
AVAILA
3V Video Amplifier with
Internal Gain and Filter in SC70
Features
S
5.2V/V Internal Gain
S
2-Pole Reconstruction Filter
S
Input Range Includes Ground
S
DC-Coupled Inputs and Outputs
S
Rail-to-Rail Output
S
3.7mA Low Quiescent Current
S
0.4µA Shutdown Current
General Description
The MAX9680 high-speed amplifier and filter is opti-
mized for portable video applications. It is specifi-
cally designed to be compatible with the video encoders
embedded in application processors with 0.4V
P-P
video
output. The input common-mode range includes GND,
which allows a video DAC (digital-to-analog converter)
to be DC-coupled to the MAX9680.
The output swings within 2mV of GND and 20mV to V
DD
with a standard back-terminated video load (150I). An
internal level shift circuit prevents the output from satu-
rating with 0V input, thus preventing sync-pulse clipping
in common video circuits. Therefore, the MAX9680 is
ideally suited for DC-coupling to the video load.
The MAX9680 has been optimized for space-sensitive
applications by integrating internal gain setting resistors
(G = 5.2V/V) and a 2-pole video-DAC reconstruction filter.
In shutdown mode, the quiescent current is reduced to
less than 0.4FA, dramatically reducing power consump-
tion and prolonging battery life.
The MAX9680 is available in the tiny 2mm x 2.1mm,
6-pin, SC70 package.
MAX9680
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
6 SC70
TOP
MARK
ADT
MAX9680AXT+T -40NC to +125NC
+Denotes
a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Typical Application Circuit appears at end of data sheet.
Applications
Mobile Phones
Digital Still Cameras
Digital Video Cameras
Block Diagram
V
DD
Pin Configuration
IN
R
IN
BUFFER
LPF
OUT
RSET
TOP VIEW
IN
1
GND
2
RSET
3
MAX9680
R
SET
+
6
V
DD
MAX9680
5
ENABLE
4
OUT
ENABLE
SHUTDOWN
CONTROL
G = 5.2V/V
SC70
GND
_______________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
3V Video Amplifier with
Internal Gain and Filter in SC70
MAX9680
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
DD
to GND).................................-0.3V to +4V
ENABLE to GND......................................................-0.3V to +4V
IN to GND ................................................. -0.3V to (V
DD
+ 0.3V)
OUT to GND (ENABLE is high) ................ -0.3V to (V
DD
+ 0.3V)
OUT to GND (ENABLE is low) .............................-0.3V to +3.2V
ENABLE, IN .....................................................................
Q50mA
OUT ...........................................................................Continuous
Electrostatic Discharge
Human Body Model.......................................................2000V
Charged Device Model ...................................................500V
Continuous Power Dissipation (T
A
= +70NC)
6-Pin SC70 (derate 3.1mW/C above +70NC) .............245mW
Operating Temperature Range ........................ -40NC to +125NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
PACKAGE THERMAL CHARACTERISTICS (Note 1)
SC70
Junction-to-Ambient Thermal Resistance (q
JA
) .....326.5°C/W
Junction-to-Case Thermal Resistance (q
JC
) .............115°C/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer
board. For detailed information on package thermal considerations, refer to
www.maxim-ic.com/thermal-tutorial.
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
= V
ENABLE
= 2.8V, V
GND
= 0V, R
L
= 150I to GND. T
A
= -40NC to +125NC, unless otherwise noted. Typical values are at T
A
= +25NC.) (Note 2)
PARAMETER
OFFSET LEVEL-SHIFT VOLTAGE
Output Level-Shift Voltage
Power-Supply Rejection Ratio
INPUT VOLTAGE RANGE
Input Voltage Range
Input Resistance (In+)
R
SET
Resistance
R
SET
/R
IN
Ratio
VOLTAGE GAIN
DC Voltage Gain (Note 3)
FREQUENCY RESPONSE
f = 4.5MHz
Filter Response
V
IN
= V
GND
to
0.387V
f = 9MHz
f = 27MHz
f = 54MHz
Differential Gain Error
Five-step modulated staircase of 127.8mV
step size and 305.3mV peak-to-peak
subcarrier amplitude, f = 4.43MHz
Five-step modulated staircase of 127.8mV
step size and 305.3mV peak-to-peak
subcarrier amplitude, f = 4.43MHz
-0.2
-3.5
-23
-45
0.2
%
dB
A
V
V
DD
= 2.7V, V
IN
= V
GND
to 0.445V
V
DD
= 2.8V, V
IN
= V
GND
to 0.464V
5.00
5.00
5.17
5.17
5.34
5.34
V/V
V
CM
R
IN
R
SET
V
DD
= 2.7V
V
DD
= 2.8V
V
IN
= 0.5V
V
RSET
= 0.5V
V
GND
V
GND
732
3150
4.214
872
3750
4.3
0.445
0.464
1012
4350
4.386
V
I
I
V
OLS
PSRR
V
IN
= V
GND
V
IN
= V
GND
, V
DD
= 2.7V to 3.6V
0
120
200
250
mV
FV/V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Differential Phase Error
0.3
degrees
2
______________________________________________________________________________________
3V Video Amplifier with
Internal Gain and Filter in SC70
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= V
ENABLE
= 2.8V, V
GND
= 0V, R
L
= 150I to GND. T
A
= -40NC to +125NC, unless otherwise noted. Typical values are at T
A
= +25NC.) (Note 2)
PARAMETER
Group Delay Variation
Signal-to-Noise Ratio
OUTPUT
Positive Voltage Output Swing
from Rail
Negative Voltage Output Swing
from Rail
Positive Voltage Output Swing
from Rail
Negative Voltage Output Swing
from Rail
Output Leakage
Output Short-Circuit Current
POWER SUPPLY
Supply Voltage
Supply Current
ENABLE/SHUTDOWN FUNCTION
Disabled (Logic-Low Threshold)
Enabled (Logic-High Threshold)
Enable Time
Disable Time
Shutdown Current
Disabled
0
1.3
350
200
0.4
4
0.45
V
DD
V
V
ns
ns
FA
V
DD
I
DD
No load
2.7
3.7
3.6
9
V
mA
I
OUT
V
IN
= 0.7V
V
IN
= -0.05V
V
IN
= 0.7V, R
L
= 75I to GND
V
IN
= -0.05V, R
L
= 75I to GND
Disabled, V
OUT
= 2V
Short to GND
90
20
1.8
35
1
2
250
5
mV
mV
mV
mV
FA
mA
SNR
SYMBOL
CONDITIONS
100kHz
P
f
P
5.5MHz, V
IN
= V
GND
to 0.387V
100% white signal
MIN
TYP
15
65
MAX
UNITS
ns
dB
MAX9680
Note 2:
All devices are 100% production tested at T
A
= +25NC. Specifications over temperature limits are guaranteed by design.
Note 3:
Voltage gain (A
V
) is a two-point measurement in which the output voltage swing is divided by the input voltage swing.
Typical Operating Characteristics
(V
DD
= V
ENABLE
= 2.8V, V
GND
= 0V, R
L
= 150I to GND. T
A
= +25NC, unless otherwise noted.)
INPUT RESISTANCE vs. TEMPERATURE
V
IN
= 0.4V
MAX9680 toc01
SET RESISTANCE vs. TEMPERATURE
MAX9680 toc02
R
SET
/R
IN
vs. TEMPERATURE
MAX9680 toc03
890
885
INPUT RESISTANCE (I)
880
875
870
865
860
-60 -40 -20 0
3900
3850
SET RESISTANCE (I)
3800
3750
3700
3650
3600
4.5
4.4
R
SET
/R
IN
(I/I)
4.3
4.2
4.1
4.0
20 40 60 80 100 120 140
-60 -40 -20 0
20 40 60 80 100 120 140
-60 -40 -20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
3
3V Video Amplifier with
Internal Gain and Filter in SC70
MAX9680
Typical Operating Characteristics (continued)
(V
DD
= V
ENABLE
= 2.8V, V
GND
= 0V, R
L
= 150I to GND. T
A
= +25NC, unless otherwise noted.)
OUTPUT VOLTAGE vs. TEMPERATURE
V
IN
= -50mV
MAX9680 toc04
MAX9680 toc05
GAIN vs. TEMPERATURE
5.5
5.4
5.3
5.2
5.1
5.0
-60 -40 -20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
5
4
OUTPUT VOLTAGE (mV)
3
2
1
0
OUTPUT VOLTAGE vs. TEMPERATURE
V
IN
= 700mV
MAX9680 toc06
2.90
2.85
OUTPUT VOLTAGE (V)
2.80
2.75
2.70
2.65
2.60
GAIN (V/V)
-60 -40 -20 0
20 40 60 80 100 120 140
-60 -40 -20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
TEMPERATURE (°C)
OUTPUT VOLTAGE LEVEL SHIFT
vs. TEMPERATURE
V
IN
= V
GND
MAX9680 toc07
QUIESCENT CURRENT vs. TEMPERATURE
V
ENABLE
= 2.8V
MAX9680 toc08
OUTPUT LEAKAGE CURRENT
vs. TEMPERATURE
ENABLE = GND, V
OUT
= 2V
MAX9680 toc09
0.200
OUTPUT VOLTAGE LEVEL SHIFT (V)
0.175
0.150
0.125
0.100
0.075
0.050
0.025
0
-60 -40 -20 0
9
8
QUIESCENT CURRENT (mA)
7
6
5
4
3
100
OUTPUT LEAKAGE CURRENT (nA)
10
1
0.1
0.01
-60 -40 -20 0
20 40 60 80 100 120 140
-60 -40 -20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
TEMPERATURE (°C)
20 40 60 80 100 120 140
TEMPERATURE (°C)
OUTPUT LEAKAGE CURRENT
vs. TEMPERATURE, ENABLE = 0
90
OUTPUT LEAKAGE CURRENT (nA)
80
70
60
50
40
30
20
10
0
-60 -40 -20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
SHORT TO GND
0.01
0.6
SHORT TO V
CC
MAX9680 toc10
SHUTDOWN QUIESCENT CURRENT
HYSTERESIS vs. TEMPERATURE
MAX9680 toc11
GAIN vs. FREQUENCY
-5
-10
GAIN (dB)
-15
-20
-25
-30
MAX9680 toc12
100
10
0
QUIESCENT CURRENT (mA)
1
T
A
= -40°C
0.1
T
A
= +125°C
T
A
= +25°C
-35
-40
1.0
100
1000
10,000
100,000
0.7
0.8
0.9
ENABLE VOLTAGE (V)
FREQUENCY (kHz)
4
______________________________________________________________________________________
3V Video Amplifier with
Internal Gain and Filter in SC70
Typical Operating Characteristics (continued)
(V
DD
= V
ENABLE
= 2.8V, V
GND
= 0V, R
L
= 150I to GND. T
A
= +25NC, unless otherwise noted.)
MAX9680
TURN-ON TIME
MAX9680 toc13
TURN-OFF TIME
MAX9680 toc14
V
CC
(2V/div)
V
CC
(2V/div)
GND
GND
OUTPUT
(1V/div)
TIME (200ns/div)
OUTPUT
(1V/div)
GND
TIME (40ns/div)
GND
OUTPUT VOLTAGE vs. OUTPUT CURRENT
MAX9680 toc15
OUTPUT VOLTAGE
vs. OUTPUT SINKING CURRENT
MAX9680 toc16
GROUP DELAY vs. FREQUENCY
90
80
70
60
50
40
30
20
10
0
100
1000
10,000
100,000
FREQUENCY (kHz)
MAX9680 toc17
3.0
2.5
OUTPUT VOLTAGE (V)
2.0
1.5
1.0
0.5
T
A
= -40°C
0
0
20
40
60
80
100
3.0
2.5
OUTPUT VOLTAGE (V)
T
A
= 0°C
2.0
1.5
1.0
0.5
0
T
A
= -40°C
100
T
A
= +125°C
T
A
= +85°C
T
A
= 0°C AND +25°C
T
A
= +125°C
T
A
= +85°C
T
A
= +25°C
T
A
= -25°C
120
0
0.5
1.0
1.5
2.0
2.5
3.0
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
MAX9680
POWER-SUPPLY REJECTION RATIO
-10
-20
RESPONSE (dB)
-30
-40
-50
-60
-70
-80
-90
-100
0.1
1
MAX9680 toc17a
DIFFERENTIAL GAIN AND PHASE
f = 4.43MHz
MAX9680 toc18
DELAY (ns)
T
A
= -25°C
DIFFERENTIAL GAIN AND PHASE
f = 4.43MHz
MAX9680 toc19
0
0.03
0.02
DIFFERENTIAL GAIN (%)
0.01
0
-0.01
-0.02
-0.03
0
1
2
3
4
5
0.6
0.4
DIFFERENTIAL PHASE (deg)
0.2
0
-0.2
-0.4
-0.6
0
1
2
3
4
5
V
DD
= 2.8V ± 100mV
P-P
V
ENABLE
= 2.8V
R
L
= 150Ω TO GND
V
IN
= GND
10
100
FREQUENCY (MHz)
_______________________________________________________________________________________
5
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