19-4453; Rev 0; 2/09
Quad Video (Filter) Amplifiers with Input
Sync-Tip Clamps
General Description
The MAX9657 is a small, low-power, quad video ampli-
fier with input sync-tip clamps. It features a bandwidth
of 15MHz, making it suitable for not only standard-defi-
nition video signals, but also video graphics array
(VGA) signals with a 640 x 480 resolution at up to 85Hz
refresh rate.
The MAX9658 is a quad video amplifier with integrated
lowpass filters and input sync-tip clamps. The lowpass
filters typically have ±1dB passband flatness out to
9.5MHz and 47dB attenuation at 27MHz. Specially suit-
ed for composite video signals, the MAX9658 is ideal
for performing anti-alias filtering at the inputs of a digital
video recorder or for performing reconstruction filtering
at the outputs of a SCART set-top box.
Both devices require that the incoming video signals be
AC-coupled to the inputs. The input sync-tip clamps set
the internal DC level of the video signals.
The amplifiers have 2V/V gain, and the outputs can be
DC-coupled to a 75Ω load, which is the equivalent of
two video loads, or AC-coupled to a 150Ω load.
Both the MAX9657/MAX9658 feature a low-power shut-
down mode, in which supply current is reduced to
35µA.
The MAX9657/MAX9658 operate from a single 2.7V to
3.6V supply, are specified over the -40°C to +125°C
automotive temperature range, and are offered in a
small, 16-pin QSOP package.
♦
Quad Channel
♦
9.5MHz, ±1dB Passband (MAX9658)
♦
47dB Attenuation at 27MHz (MAX9658)
♦
Fixed Gain of 2V/V
♦
Low Power: 21mA
♦
2.7V to 3.6V Single-Supply Operation
Features
MAX9657/MAX9658
Ordering Information
PART
MAX9657AEE+
MAX9658AEE+
PIN-PACKAGE
16 QSOP
16 QSOP
STANDARD-DEFINITION
VIDEO FILTER
No
Yes
Note:
All devices are specified over the -40°C to +125°C oper-
ating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Functional Diagram
MAX9657/MAX9658
UNKNOWN
BIAS
SHDN
300mV
IN0
LPF*
A
V
= 2V/V
CLAMPREF
IN1
OUT1
A
V
= 2V/V
CLAMPREF
IN2
OUT2
A
V
= 2V/V
OUT0
Applications
Set-Top Boxes
Digital Video Recorders
LPF*
LPF*
Typical Application Circuits and Pin Configuration appear
at end of data sheet.
CLAMPREF
IN3
OUT3
A
V
= 2V/V
CLAMPREF
LPF*
GND
*LOWPASS FILTER IN MAX9658 ONLY.
________________________________________________________________
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.
Quad Video (Filter) Amplifiers with Input
Sync-Tip Clamps
MAX9657/MAX9658
ABSOLUTE MAXIMUM RATINGS
Supply Voltage
V
DD
to GND ..........................................................-0.3V to +4V
Input Pins,
SHDN
.....................................(GND - 0.3V) to +4V
Duration of Output Short Circuit to V
DD
or GND ........Continuous
Continuous Input Current
Input Pins......................................................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
Operating Temperature Range .........................-40°C to +125°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
= 3.3V, V
GND
= 0V, V
SHDN
= V
DD
, R
L
= 150Ω to GND, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
PARAMETER
Supply Voltage Range
Quiescent Supply Current
Shutdown Supply Current
Sync-Tip Clamp Level
SYMBOL
V
DD
I
DD
I
SHDN
V
CLP
Guaranteed by output-
voltage swing
2.7V
≤
V
DD
≤
3.6V
3.0V
≤
V
DD
≤
3.6V
No load
SHDN
= GND
0.23
CONDITIONS
Guaranteed by power-supply rejection test
MIN
2.7
TYP
3.3
21
35
0.3
MAX
3.6
45
70
0.39
1.05
V
P-P
1.2
UNITS
V
mA
µA
V
Input Voltage Range
Sync Crush
Input Clamping Current
Maximum Input Source
Resistance
Sync-tip clamp; percentage reduction in
sync pulse (0.3V
P-P
); guaranteed by input
clamping current measurement
1
300
V
DD
= 2.7V,
0V
≤
V
IN
≤
1.05V
V
DD
= 3V,
0V
≤
V
IN
≤
1.2V
1.96
1.96
-2
0.218
0.3
2.1
2.1
2.4
2.4
2.1
2
2
2
2
%
µA
Ω
DC Voltage Gain (Note 2)
A
V
R
L
= 150Ω to GND
(Note 2)
2.04
V/V
2.04
+2
0.39
%
V
DC Gain Mismatch
Output Level
Guaranteed by DC voltage gain
Measured at V
OUT
, C
IN_
= 0.1µF to GND
Measured at output, V
DD
= 2.7V, V
IN
=
V
CLP
to (V
CLP
+1.05V), R
L
= 150Ω to -0.2V
Measured at output, V
DD
= 2.7V, V
IN
=
V
CLP
to (V
CLP
+1.05V), R
L
= 150Ω to V
DD
/2
Output-Voltage Swing
Measured at output, V
DD
= 3.0V, V
IN
=
V
CLP
to (V
CLP
+1.2V), R
L
= 150Ω to -0.2V
Measured at output, V
DD
= 3.0V, V
IN
=
V
CLP
to (V
CLP
+1.2V), R
L
= 150Ω to V
DD
/2
Measured at output, V
DD
= 3.135V, V
IN
=
V
CLP
to (V
CLP
+1.05V), R
L
= 75Ω to -0.2V
V
P-P
2
_______________________________________________________________________________________
Quad Video (Filter) Amplifiers with Input
Sync-Tip Clamps
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3.3V, V
GND
= 0V, V
SHDN
= V
DD
, R
L
= 150Ω to GND, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
PARAMETER
Output Short-Circuit Current
Output Resistance
Power-Supply Rejection Ratio
Small-Signal Bandwidth
Large-Signal Bandwidth
Slew Rate
Settling Time
R
OUT
SYMBOL
CONDITIONS
Short to GND (sourcing)
Short to V
DD
(sinking)
V
OUT
= 1.5V, -10mA
≤
I
LOAD
≤
+10mA
2.7V
≤
V
DD
≤
3.6V
f = 100kHz, 100mV
P-P
V
OUT
= 100mV
P-P
(MAX9657 only)
V
OUT
= 2V
P-P
(MAX9657 only)
MAX9657 only
Settled to within 0.1% of final value
(MAX9657 only)
V
OUT
= 2V
P-P
, reference frequency is
100kHz ±1dB passband flatness (MAX9658
only)
Standard-Definition
Reconstruction Filter
f = 5.5MHz
V
OUT
= 2V
P-P
, reference
frequency is 100kHz
(MAX9658 only)
f = 9.5MHz
f = 10MHz
f = 27MHz
Differential Gain
DG
5-step modulated staircase of 129mV step
size and 286mV peak-to-peak subcarrier
amplitude, f = 4.43MHz
5-step modulated staircase of 129mV step
size and 286mV peak-to-peak subcarrier
amplitude, f = 4.43MHz
100kHz
≤
f
≤
5MHz, outputs are 2V
P-P
100kHz
≤
f
≤
5MHz
2T = 200ns
2T = 200ns; bar time is 18µs; the beginning
2.5%, and the ending 2.5% of the bar time
is ignored
2T = 200ns; bar time is 18µs; the beginning
2.5%, and the ending 2.5% of the bar time
is ignored
5-step staircase
f = 5.5MHz
f = 15kHz
f = 4.43MHz
f = 30MHz
48
MIN
TYP
140
70
0.2
64
20
27
15
65
75
MAX
UNITS
mA
Ω
dB
MHz
MHz
V/µs
ns
MAX9657/MAX9658
9.5
0.1
-1
-3
-47
0.4
MHz
dB
%
Differential Phase
Group-Delay Distortion
Peak Signal to RMS Noise
2T Pulse Response
2T Bar Response
DP
0.45
9
71
0.2
0.2
deg
ns
dB
K%
K%
2T Pulse-to-Bar K Rating
Nonlinearity
Output Impedance
All-Hostile Crosstalk
Output-to-Input Crosstalk
0.3
0.1
8.07
-82
-78
-68
K%
%
Ω
dB
dB
_______________________________________________________________________________________
3
Quad Video (Filter) Amplifiers with Input
Sync-Tip Clamps
MAX9657/MAX9658
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3.3V, V
GND
= 0V, V
SHDN
= V
DD
, R
L
= 150Ω to GND, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
PARAMETER
LOGIC SIGNALS (SHDN)
Logic-Low Threshold
Logic-High Threshold
Logic Input Current
V
IL
V
IH
I
IN
0.7 x
V
DD
10
0.3 x
V
DD
V
V
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Note 1:
All devices are 100% production tested at T
A
= +25°C. Specifications over temperature limits 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.
Typical Operating Characteristics (MAX9657)
(V
DD
= 3.3V, V
GND
= 0, V
SHDN
= V
DD
, R
L
= 150Ω to GND, T
A
= +25°C.)
SMALL-SIGNAL GAIN
vs. FREQUENCY
10
5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
100k
MAX9657 toc01
SMALL-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX9657 toc02
LARGE-SIGNAL GAIN
vs. FREQUENCY
10
5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
100k
V
IN
= 1V
P-P
NOTE: GAIN IS NORMALIZED TO 0dB
MAX9657 toc03
MAX9657 toc06
V
IN
= 50mV
P-P
NOTE: GAIN IS NORMALIZED TO 0dB
3
2
1
0
GAIN (dB)
V
IN
= 50mV
P-P
NOTE: GAIN IS NORMALIZED TO 0dB
GAIN (dB)
-2
-3
-4
-5
-6
-7
GAIN (dB)
-1
1M
10M
100M
100k
1M
10M
100M
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX9657 toc04
VIDEO CROSSTALK
vs. FREQUENCY
V
IN
= 1V
P-P
NOTE: GAIN IS NORMALIZED TO 0dB
MAX9657 toc05
VIDEO GROUP DELAY DISTORTION
vs. FREQUENCY
50
45
40
GROUP DELAY (ns)
35
30
25
20
15
V
IN
= 1V
P-P
NOTE: GAIN IS NORMALIZED TO 0dB
3
2
1
0
GAIN (dB)
V
IN
= 1V
P-P
NOTE: GAIN IS NORMALIZED TO 0dB
0
-20
-40
GAIN (dB)
-60
-1
-2
-3
-4
-5
-6
-7
100k
1M
10M
100M
FREQUENCY (Hz)
ALL-HOSTILE
-80
-100
-120
100k
1M
10M
100M
FREQUENCY (Hz)
1 ADJACENT CHANNEL
2 ADJACENT CHANNELS
10
5
0
100k
1M
10M
100M
FREQUENCY (Hz)
4
_______________________________________________________________________________________
Quad Video (Filter) Amplifiers with Input
Sync-Tip Clamps
Typical Operating Characteristics (MAX9657) (continued)
(V
DD
= 3.3V, V
GND
= 0, V
SHDN
= V
DD
, R
L
= 150Ω to GND, T
A
= +25°C.)
VIDEO PSRR
vs. FREQUENCY
MAX9657 toc07
MAX9657/MAX9658
VOLTAGE GAIN
vs. TEMPERATURE
MAX9657 toc08
DIFFERENTIAL GAIN AND PHASE
DIFFERENTIAL GAIN (%)
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
0
1
2
3
1
2
3
f = 3.58MHz
MAX9657 toc09
0
-10
-20
PSRR (dB)
-30
-40
-50
-60
-70
-80
2.04
2.03
VOLTAGE GAIN (V/V)
2.02
2.01
2.00
1.99
1.98
1.97
1.96
-50
-25
0
25
50
75
100
V
DD
= 3.3V + 100mV
P-P
4
5
DIFFERENTIAL PHASE (deg)
f = 3.58MHz
100k
1M
10M
100M
125
4
5
FREQUENCY (Hz)
TEMPERATURE (°C)
DIFFERENTIAL GAIN AND PHASE
DIFFERENTIAL GAIN (%)
0.10
0.05
0
-0.05
-0.10
-0.15
-0.25
0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
0
1
2
3
1
2
3
f = 4.43MHz
MAX9657 toc10
2T RESPONSE
12.5T RESPONSE
MAX9657 toc11
MAX9657 toc12
IN
200mV/div
4
5
IN
200mV/div
DIFFERENTIAL PHASE (deg)
f = 4.43MHz
OUT
400mV/div
OUT
400mV/div
4
5
100ns/div
400ns/div
NTC-7 VIDEO TEST SIGNAL
MAX9657 toc13
FIELD SQUARE WAVE
PULSE RESPONSE
MAX9657 toc14
IN
500mV/div
IN
500mV/div
OUT
1V/div
OUT
1V/div
10μs/div
2ms/div
OUTPUT (700mV/div)
INPUT (700mV/div)
TIME (100ns/div)
_______________________________________________________________________________________
MAX9657 toc15
5
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