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PDF MAX9657 Data sheet ( Hoja de datos )
| Número de pieza | MAX9657 | |
| Descripción | (MAX9657 / MAX9658) Quad Video (Filter) Amplifiers | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX9657 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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19-4453; Rev 0; 2/09
www.DataSheet4U.com
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.
Applications
Set-Top Boxes
Digital Video Recorders
Typical Application Circuits and Pin Configuration appear
at end of data sheet.
Features
♦ 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
Ordering Information
PART
PIN-PACKAGE
STANDARD-DEFINITION
VIDEO FILTER
MAX9657AEE+ 16 QSOP
MAX9658AEE+ 16 QSOP
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
UNKNOWN
BIAS
SHDN
IN0
MAX9657/MAX9658
LPF*
300mV
OUT0
CLAMPREF
AV = 2V/V
IN1
LPF*
CLAMPREF
OUT1
AV = 2V/V
IN2
LPF*
CLAMPREF
OUT2
AV = 2V/V
IN3
LPF*
CLAMPREF
OUT3
AV = 2V/V
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.
1 page  
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Quad Video (Filter) Amplifiers with Input
Sync-Tip Clamps
Typical Operating Characteristics (MAX9657) (continued)
(VDD = 3.3V, VGND = 0, VSHDN = VDD, RL = 150Ω to GND, TA = +25°C.)
VIDEO PSRR
vs. FREQUENCY
0
VDD = 3.3V + 100mVP-P
-10
-20
-30
-40
-50
-60
-70
-80
100k
1M 10M
FREQUENCY (Hz)
100M
VOLTAGE GAIN
vs. TEMPERATURE
2.04
2.03
2.02
2.01
2.00
1.99
1.98
1.97
1.96
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
DIFFERENTIAL GAIN AND PHASE
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
0
f = 3.58MHz
12345
0.8
0.6
0.4
0.2
0
-0.2
-0.4
0
f = 3.58MHz
12345
DIFFERENTIAL GAIN AND PHASE
0.10
0.05
0
-0.05
-0.10
-0.15
-0.25
0
f = 4.43MHz
12345
0.8
0.6
0.4
0.2
0
-0.2
-0.4
0
f = 4.43MHz
12345
NTC-7 VIDEO TEST SIGNAL
MAX9657 toc13
IN
500mV/div
2T RESPONSE
MAX9657 toc11
IN
200mV/div
OUT
400mV/div
100ns/div
FIELD SQUARE WAVE
MAX9657 toc14
IN
500mV/div
12.5T RESPONSE
MAX9657 toc12
IN
200mV/div
400ns/div
PULSE RESPONSE
OUT
400mV/div
OUT
1V/div
OUT
1V/div
10μs/div
2ms/div
TIME (100ns/div)
_______________________________________________________________________________________ 5
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Quad Video (Filter) Amplifiers with Input
Sync-Tip Clamps
GRAPHICS PROCESSING
UNIT OR
MPEG DECODER
LUMA
DAC
75Ω
CHROMA
DAC
75Ω
CVBS
DAC
75Ω
0.1μF
IN0
0.1μF
CLAMPREF
IN1
0.1μF
CLAMPREF
IN2
0.1μF
CLAMPREF
IN3
CLAMPREF
MAX9657/
MAX9658
LPF*
AV = 2V/V
VDD
GND 0.1μF
+3.3V
OUT0 75Ω
220μF
OUT1 75Ω
220μF
LPF*
AV = 2V/V
OUT2 75Ω
220μF
LPF*
AV = 2V/V
OUT3 75Ω
220μF
LPF*
AV = 2V/V
Y
C
CVBS1
CVBS2
*LOWPASS FILTER IN MAX9658 ONLY.
Figure 1. AC-Coupled Outputs
Table 1. Quiescent and Average Power Consumption for MAX9657/MAX9658
MEASUREMENT
Quiescent power consumption
Average power consumption
POWER CONSUMPTION
(mW)
69
200
CONDITIONS
No load.
150Ω to ground on each output. 50% flat field signal on
each input.
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet MAX9657.PDF ] | |
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