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參數(shù)資料
| 型號： | ADV7850KBCZ-5 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 18/32頁 |
| 文件大小： | 0K |
| 描述： | IC VIDEO DECODER 3D 425CSPBGA |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | HDMI，接收器 |
| 應(yīng)用： | HDTV，投影儀，機(jī)頂盒 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 425-LFBGA，CSBGA |
| 供應(yīng)商設(shè)備封裝： | 425-CSPBGA（19x19） |
| 包裝： | 托盤 |
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Data Sheet
ADV7850
Rev. 0 | Page 25 of 32
FUNCTIONAL OVERVIEW
HDMI RECEIVER
The ADV7850 front end incorporates a 4:1 multiplexed HDMI
receiver with Xpressview fast switching technology and support
for HDMI features including ARC and 3D TV. Building on the
feature set of Analog Devices existing HDMI devices, the
ADV7850 also offers support for all HDTV formats up to 3D
1080p at 60 Hz and 2160p at 24 Hz. Xpressview fast switching
technology, using the Analog Devices hardware-based HDCP
engine that minimizes software overhead, allows switching
between any two input ports in less than 1 second.
With the inclusion of HDCP 1.4, the ADV7850 can receive
encrypted video content. The HDMI interface of the ADV7850
allows for authentication of a video receiver, decryption of encoded
data at the receiver, and renewal of that authentication during
transmission, as specified by the HDCP 1.4 protocol. Repeater
support is also offered by the ADV7850.
The ADV7850 supports the audio return channel feature. There
is a dedicated S/PDIF input on which audio can be received for
retransmission on the HDMI input. Wide ranges of 3D video
formats are supported, including frame packing up to 3D 1080p
at 60 Hz and 2160p at 24 Hz.
The HDMI receiver incorporates active equalization of the
HDMI data signals. This equalization compensates for the high
frequency losses inherent in HDMI and DVI cabling, especially
at longer lengths and higher frequencies. It is capable of equaliz-
ing for cable lengths up to 30 meters to achieve robust receiver
performance at even the highest HDMI data rates.
The HDMI receiver offers advanced audio functionality. It sup-
ports multichannel I2S audio for up to eight channels. It also
supports a six-DSD channel interface with each channel carry-
ing an oversampled 1-bit representation of the audio signal as
delivered on SACD. The ADV7850 can also receive HBR audio
packet streams and outputs them through the HBR interface in
an S/PDIF format conforming to the IEC 60958 standard.
The receiver contains an audio mute controller that can detect a
variety of conditions that may result in audible extraneous noise
in the audio output. On detection of these conditions, the audio
signal can be muted to prevent audio clicks or pops.
HDMI receiver features include:
4:1 multiplexed HDMI receiver
HDMI, ARC, and 3D format support, DVI 1.0
297 MHz HDMI receiver
Integrated equalizer
High-bandwidth Digital Content Protection (HDCP 1.4)
on background ports
Internal HDCP keys
36-/30-bit Deep Color support
PCM, HBR, DSD, and DST audio packet support
Repeater support
Internal E-EDID RAM
Hot plug assert output pin for each HDMI port
ANALOG FRONT END
The ADV7850 analog front end comprises four 170 MHz, 12-bit
ADCs that digitize the analog video signal before applying it
to the standard definition processor (SDP) or component
processor (CP).
The front end also includes a 13-channel input mux that enables
multiple video signals to be applied to the ADV7850 without
the requirement of an external mux.
Current and voltage clamp control loops ensure that any dc
offsets are set properly for the video signal. The clamps are
positioned in front of each ADC to ensure that the video signal
remains within the range of the converter.
The ADCs are configured to run up to 4× oversampling mode
when decoding composite, S-Video, or SCART inputs. For
component 525i, 625i, 525p, and 625p sources, 4× oversampling is
performed. Higher frequency video standards can be 2× or 1×
oversampled. Oversampling the video signals reduces the cost
and complexity of external antialiasing filters with the benefit of
an increased signal-to-noise ratio (SNR).
Optional internal antialiasing filters with programmable
bandwidth are positioned in front of each ADC. These filters
can be used to band-limit video signals, removing spurious out-
of-band noise.
The ADV7850 can support the simultaneous processing of
CVBS and RGB standard definition signals to enable SCART
compatibility and overlay functionality. A combination of
CVBS and RGB inputs can be mixed with the output under the
control of I2C registers.
Analog front-end features include:
Four 170 MHz, 12-bit NSV ADCs that enable 10-bit (SD)/
12-bit (CP) video decoding
13-channel analog input mux that enables multiple source
connections without the requirement of an external mux
Four current and voltage clamp control loops that ensure
any dc offsets are set properly for the video signal
SCART functionality and SD RGB overlay on CVBS
controlled by fastblank input
SCART source switching detection through the TRI1 to TRI8
inputs
Four programmable antialiasing filters
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