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PDF ( 数据手册 , 数据表 ) MAX9653

零件编号 MAX9653
描述 (MAX9652 - MAX9654) HD/SD Triple-Channel Filter Amplifiers
制造商 Maxim Integrated
LOGO Maxim Integrated LOGO 


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MAX9653 数据手册, 描述, 功能
19-4236; Rev 0; 8/08
EVALUATION KIT
AVAILABLE
3.3V, HD/SD Triple-Channel Filter Amplifiers
with Shutdown
General Description
The MAX9652/MAX9653/MAX9654 are 3.3V, triple-
channel, high-definition (HD) video-filter amplifiers.
Specially designed for YPbPr component video signals,
these devices are ideal for a wide range of set-top box
and portable applications. The inputs to the MAX9652/
MAX9653/MAX9654 are AC-coupled. YIN has a sync-
tip clamp while PBIN and PRIN have keyed clamps.
The output buffer has gain of 2V/V and drives a stan-
dard back-terminated 75Ω video load.
The passband of the MAX9654 is logic selectable
between standard definition (SD) and high definition. The
MAX9652/MAX9653 have a fixed passband for HD video.
The MAX9654 SD lowpass filter has ±1dB passband out
to 8.5MHz and 57dB attenuation at 27MHz. The
MAX9652/MAX9653/MAX9654 HD lowpass filter have
±1dB passband out to 42MHz and 50dB attenuation at
109MHz.
The devices consume only 9.5mA per channel and
operate from a 3.3V supply. The MAX9653/MAX9654
feature a low-power, 12µA shutdown mode. The
MAX9652/MAX9653/MAX9654 are specified over the
-40°C to +125°C automotive temperature range.
Applications
Set-Top Boxes
PVR
DVD Players
DVC
HDTV
Features
9.5mA/Channel Supply Current
Selectable Lowpass Filter for High-Definition or
Standard-Definition Video Signals (MAX9654)
8.5MHz Standard-Definition Passband with 57dB
Attenuation at 27MHz
42MHz High-Definition Passband with 50dB
Attenuation at 109MHz
2V/V Gain
3.135V to 3.465V Single-Supply Operation
12µA Shutdown Mode (MAX9653/MAX9654)
Ordering Information
PART
PIN-PACKAGE FILTER SHUTDOWN
MAX9652ASA+T 8 SO
HD No
MAX9653AUB+T 10 µMAX
HD Yes
MAX9654AUB+T 10 µMAX
SD/HD
Yes
Note: All devices are specified over the -40°C to +125°C oper-
ating temperature range.
+Denotes a lead-free/RoHS-compliant package.
T = Tape and reel.
Typical Application Circuit
+3.3V
MPEG DECODER
CURRENT
DAC
SHDN2
SD/HD1
0.1μF
YIN
CLAMP
0.1μF
VDD
MAX9652
MAX9653
MAX9654
SD/HD3
2V/V
YOUT 75Ω
CURRENT
DAC
0.1μF
PBIN
KEYED
CLAMP
SD/HD3
2V/V PBOUT 75Ω
CURRENT
DAC
0.1μF
PRIN
KEYED
CLAMP
SD/HD3
2V/V PROUT 75Ω
GND
1 MAX9654 ONLY.
2 MAX9653 AND MAX9654 ONLY.
3 FOR THE MAX9654, THE PASSBAND IS SELECTABLE BETWEEN SD AND HD. FOR THE MAX9652/MAX9653, THE PASSBAND IS HD.
________________________________________________________________ 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.
http://www.Datasheet4U.com







MAX9653 pdf, 数据表
3.3V, HD/SD Triple-Channel Filter Amplifiers
with Shutdown
MAX9652
1
2
3
4
5
6
7
8
PIN
MAX9653
1
3
4
5
6
7
8, 9
10
2
MAX9654
1
3
4
5
6
7
8
10
2
9
Pin Description
NAME
YIN
VDD
PBIN
PRIN
PROUT
PBOUT
GND
YOUT
SHDN
SD/HD
FUNCTION
Y Input
Power Supply. Bypass VDD to GND with a 0.1µF capacitor.
Pb Input
Pr Input
Pr Output
Pb Output
Ground
Y Output
Active-Low Shutdown. Connect SHDN to VDD for normal
operation and to GND for low power consumption.
Standard-Definition/Active-Low High-Definition Passband
Select (MAX9654)
Detailed Description
The MAX9652/MAX9653/MAX9654 are HD video-filter
amplifiers that operate from a 3.3V supply. They can be
used to lowpass filter the signal after a video digital-to-
analog converter (DAC) or before a video analog-to-
digital converter (ADC). The inputs to the parts must be
AC-coupled; the outputs can be AC- or DC-coupled.
The average power consumption of the parts is signifi-
cantly less than the average power consumption of the
5V generation of HD video filter amplifiers. The quies-
cent power consumption of the MAX9654 is 95mW, and
the average power consumption, which is defined when
the parts drive a 150Ω load to ground with color bars, is
200mW.
The MAX9652 is the simplest member of the family, with
neither selectable SD/HD filters nor shutdown capabili-
ty. This device is best suited for line-powered equip-
ment such as set-top boxes, DVD players, and A/V
receivers.
The MAX9653 has shutdown capability and is a natural
fit in portable equipment and line-powered equipment
in which standby power consumption is a concern. The
MAX9653 is also an option in SCART set-top boxes with
analog high-definition video outputs. In those designs,
the same triple DAC typically generates both the stan-
dard-definition RGB signals that are routed through the
SCART device (refer to the MAX9598 data sheet) and
the high-definition YPbPr signals that are routed
through the MAX9653. Only one signal set is output at
any given time, and so the device connected to the
unused outputs must be shut down.
The MAX9654 has both selectable SD/HD filters and
shutdown capability. The applications of the MAX9654
are similar to those of the MAX9653, but the MAX9654
provides the additional capability to switch between
standard-definition and high-definition formats. The
MAX9654 has a passband (±1dB) of 42MHz for high-
definition signals and a passband of 8.5MHz for stan-
dard-definition signals.
Inputs
Video signals must be AC-coupled into the MAX9652/
MAX9653/MAX9654 using 0.1µF capacitors. An input
sync tip clamp sets the DC level for the luma signal at
YIN. Keyed clamps on PBIN and PRIN set the DC bias
of the color difference signals at PBIN and PRIN. When
the input sync tip clamp detects a sync pulse on the
luma signal, it generates a signal that activates the
keyed clamps on PBIN and PRIN.
In shutdown mode, the inputs to the MAX9653 and the
MAX9654 do not distort the video signal in case the
outputs of the video DAC are also connected to another
video circuit such as a dual SCART device. See the
SCART Set-Top Box with Analog HD Outputs section.
The inputs in shutdown mode are biased at VDD/3,
which is sufficiently above ground so that the ESD
diodes never forward bias as the video signal changes.
The input resistance in shutdown is 220kΩ which pre-
sents negligible loading on the video current DAC.
HD Video Filter
The MAX9652/MAX9653/MAX9654 have a six-pole,
Butterworth filter with a typical passband (±1dB) of
8 _______________________________________________________________________________________
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