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PDF ADV7281 Data sheet ( Hoja de datos )
| Número de pieza | ADV7281 | |
| Descripción | 4x Oversampled SDTV Video Decoder | |
| Fabricantes | Analog Devices | |
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Data Sheet
10-Bit, 4× Oversampled SDTV Video
Decoder with Differential Inputs
ADV7281
FEATURES
Worldwide NTSC/PAL/SECAM color demodulation support
One 10-bit analog-to-digital converter (ADC), 4× oversampling
per channel for CVBS, Y/C, and YPrPb modes
Analog video input channels with on-chip antialiasing filter
ADV7281: up to 4 input channels
ADV7281-M: up to 6 input channels
ADV7281-MA: up to 8 input channels
Video input support for CVBS (composite), Y/C (S-Video),
and YPrPb (component)
Fully differential, pseudo differential, and single-ended
CVBS video input support
NTSC/PAL/SECAM autodetection
Short-to-battery (STB) diagnostics on 2 video inputs
(ADV7281 and ADV7281-M only)
Up to 4 V common-mode input range solution
Excellent common-mode noise rejection capabilities
5-line adaptive 2D comb filter and CTI video enhancement
Adaptive Digital Line Length Tracking (ADLLT), signal
processing, and enhanced FIFO management provide
mini-time base correction (TBC) functionality
Integrated automatic gain control (AGC) with adaptive
peak white mode
Fast switching capability
Adaptive contrast enhancement (ACE)
Down dither (8-bit to 6-bit)
Rovi (Macrovision) copy protection detection
MIPI CSI-2 output interface (ADV7281-M and ADV7281-MA)
8-bit ITU-R BT.656 YCrCb 4:2:2 output (ADV7281)
Full featured vertical blanking interval (VBI) data slicer
Power-down mode available
2-wire, I2C-compatible serial interface
Qualified for automotive applications
−40°C to +105°C temperature grade
32-lead, 5 mm × 5 mm, RoHS-compliant LFCSP
APPLICATIONS
Smartphone/multimedia handsets
Automotive infotainment
DVRs for video security
Media players
GENERAL DESCRIPTION
The ADV7281/ADV7281-M/ADV7281-MA are versatile
one-chip, multiformat video decoders. The ADV7281/
ADV7281-M/ADV7281-MA automatically detect standard
analog baseband video signals compatible with worldwide
NTSC, PAL, and SECAM standards in the form of composite,
S-Video, and component video.
The ADV7281 converts the analog video signals into a YCrCb
4:2:2 video data stream that is compatible with the 8-bit ITU-R
BT.656 interface standard.
The ADV7281-M/ADV7281-MA convert the analog video
signals into an 8-bit YCrCb 4:2:2 video data stream that is
output over a mobile industry processor interface (MIPI®)
CSI-2 interface.
The analog video inputs of the ADV7281/ADV7281-M/
ADV7281-MA accept single-ended, pseudo differential, and
fully differential signals. The ADV7281 provides four analog
inputs and two STB diagnostic pins. The ADV7281-M provides
six analog inputs, two STB diagnostic pins, and three general-
purpose outputs. The ADV7281-MA provides eight analog
inputs and three general-purpose outputs.
The ADV7281/ADV7281-M/ADV7281-MA are programmed
via a 2-wire, serial bidirectional port (I2C compatible) and
are fabricated in a 1.8 V CMOS process. The ADV7281/
ADV7281-M/ADV7281-MA are provided in space-saving
LFCSP surface-mount, RoHS-compliant packages. The
ADV7281/ADV7281-M/ADV7281-MA are rated over the
−40°C to +105°C temperature range. This makes the ADV7281/
ADV7281-M/ADV7281-MA ideal for automotive applications.
Rev. B
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2013–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
ADV7281
Data Sheet
SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
AVDD, DVDD, PVDD, and MVDD = 1.71 V to 1.89 V, DVDDIO = 2.97 V to 3.63 V, specified at operating temperature range, unless otherwise noted.
Table 1.
Parameter
Symbol Test Conditions/Comments Min Typ Max Unit
STATIC PERFORMANCE
ADC Resolution
N
10 Bits
Integral Nonlinearity
INL CVBS mode
2 LSB
Differential Nonlinearity
DNL CVBS mode
±0.6 LSB
DIGITAL INPUTS
Input High Voltage
VIH DVDDIO = 3.3 V
2
V
DVDDIO = 1.8 V, ADV7281 only
1.2
V
Input Low Voltage
VIL DVDDIO = 3.3 V
0.8 V
DVDDIO = 1.8 V, ADV7281 only
0.4 V
Input Leakage Current
IIN RESET pin
−10 +10 µA
SDATA, SCLK pins
−10
+15 µA
PWRDWN, ALSB pins
−10
+50 µA
Input Capacitance
CIN
10 pF
CRYSTAL INPUT
Input High Voltage
VIH XTALN pin
1.2
V
Input Low Voltage
VIL XTALN pin
0.4 V
DIGITAL OUTPUTS
Output High Voltage
VOH
DVDDIO = 3.3 V, ISOURCE = 0.4 mA
2.4
V
DVDDIO = 1.8 V, ISOURCE = 0.4 mA,
ADV7281 only
1.4
V
Output Low Voltage
VOL DVDDIO = 3.3 V, ISINK = 3.2 mA
0.4 V
DVDDIO = 1.8 V, ISINK = 1.6 mA,
ADV7281 only
0.2 V
High Impedance Leakage Current
Output Capacitance
ILEAK
COUT
10 µA
20 pF
POWER REQUIREMENTS1, 2
Digital I/O Power Supply
DVDDIO
ADV7281-M/ADV7281-MA
ADV7281
2.97 3.3
1.62 3.3
3.63 V
3.63 V
PLL Power Supply
PVDD
1.71 1.8
1.89 V
Analog Power Supply
AVDD
1.71 1.8
1.89 V
Digital Power Supply
DVDD
1.71 1.8
1.89 V
MIPI Tx Power Supply
MVDD
ADV7281-M/ADV7281-MA only 1.71
1.8
1.89 V
Digital I/O Supply Current
IDVDDIO
ADV7281-M/ADV7281-MA
1.5 mA
ADV7281
5 mA
PLL Supply Current
MIPI Tx Supply Current
Analog Supply Current
IPVDD
IMVDD
IAVDD
ADV7281-M/ADV7281-MA only
12
14
mA
mA
Single-Ended CVBS Input
47 mA
Differential CVBS Input
Fully differential and pseudo
differential CVBS
69
mA
Y/C Input
60 mA
YPrPb Input
75 mA
Digital Supply Current
Single-Ended CVBS Input
IDVDD
60 mA
Differential CVBS Input
Fully differential and pseudo
differential CVBS
60
mA
Y/C Input
60 mA
YPrPb Input
60 mA
Rev. B | Page 4 of 32
5 Page 
ADV7281
ABSOLUTE MAXIMUM RATINGS
Table 7.
Parameter1
AVDD to GND
DVDD to GND
PVDD to GND
MVDD to GND1
DVDDIO to GND
PVDD to DVDD
MVDD to DVDD2
AVDD to DVDD
Digital Inputs Voltage
Digital Outputs Voltage
Analog Inputs to Ground
Maximum Junction Temperature
(TJ max)
Storage Temperature Range
Infrared Reflow Soldering
(20 sec)
Rating
2.2 V
2.2 V
2.2 V
2.2 V
4V
−0.9 V to +0.9 V
−0.9 V to +0.9 V
−0.9 V to +0.9 V
GND − 0.3 V to DVDDIO + 0.3 V
GND − 0.3 V to DVDDIO + 0.3 V
GND − 0.3 V to AVDD + 0.3 V
140°C
−65°C to +150°C
260°C
1 The Absolute Maximum Ratings assume that DGND pins and the exposed
pad of the ADV7281/ADV7281-M/ADV7281-MA are connected together
to a common ground plane (GND). This is part of the recommended layout
scheme. See PCB Layout Recommendations for more information. The
Absolute Maximum Ratings are stated in relation to this common ground
plane.
2 MVDD applies to the ADV7281-M and ADV7281-MA only.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
These devices are high performance integrated circuits with
an ESD rating of <2 kV, and they are ESD sensitive. Proper
precautions must be taken for handling and assembly.
Data Sheet
THERMAL RESISTANCE
The thermal resistance values in Table 8 are specified for the
device soldered onto a 4-layer printed circuit board (PCB) with
a common ground plane and with the exposed pad of the device
connected to DGND. The values in Table 8 are maximum values.
Table 8. Thermal Resistance for the 32-Lead LFCSP
Thermal Characteristic
Symbol Value Unit
Junction-to-Ambient Thermal θJA
Resistance (Still Air)
32.5 °C/W
Junction-to-Case Thermal
Resistance
θJC
2.3 °C/W
REFLOW SOLDER
The ADV7281/ADV7281-M/ADV7281-MA are Pb-free,
environmentally friendly products. They are manufactured using
the most up-to-date materials and processes. The coating on the
leads of each device is 100% pure Sn electroplate. The devices
are suitable for Pb-free applications and can withstand surface-
mount soldering at up to 255°C (±5°C).
In addition, the ADV7281/ADV7281-M/ADV7281-MA are
backward-compatible with conventional SnPb soldering
processes. This means that the electroplated Sn coating can
be soldered with Sn/Pb solder pastes at conventional reflow
temperatures of 220°C to 235°C.
ESD CAUTION
Rev. B | Page 10 of 32
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ADV7281.PDF ] | |
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