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| 型號： | EVAL-ADV7180LQEBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 62/116頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVALUATION ADV7180 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | Advantiv® |
| 主要目的： | 視頻，SDTV 視頻解碼器 - NTSC，PAL，SECAM |
| 嵌入式： | 否 |
| 已用 IC / 零件： | ADV7180 |
| 主要屬性： | CVBS（復(fù)合），Y/C（S 視頻）和 YPrPb（元件）輸入 |
| 次要屬性： | 8 位 ITU-R BT.656 YCrCb 4:2:2 輸出 |
| 已供物品： | 板 |
| 相關(guān)產(chǎn)品： | ADV7180BCPZ-REEL-ND - IC VIDEO DECODER SDTV 40-LFCSP ADV7180BSTZ-ND - IC VIDEO DECODER SDTV 64-LQFP ADV7180BCPZ-ND - IC VIDEO DECODER SDTV 40-LFCSP |
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Data Sheet
ADV7180
Rev. I | Page 5 of 116
INTRODUCTION
The ADV7180 is a versatile one-chip multiformat video decoder
that automatically detects and converts PAL, NTSC, and SECAM
standards in the form of composite, S-Video, and component
video into a digital ITU-R BT.656 format.
The simple digital output interface connects gluelessly to a wide
range of MPEG encoders, codecs, mobile video processors, and
Analog Devices digital video encoders, such as the ADV7391.
External HS, VS, and FIELD signals provide timing references
for LCD controllers and other video ASICs that do not support the
ITU-R BT.656 interface standard. The different package options
available for the ADV7180 are shown in Table 2.
ANALOG FRONT END
The ADV7180 analog front end comprises a single high speed,
10-bit analog-to-digital converter (ADC) that digitizes the
analog video signal before applying it to the standard definition
processor. The analog front end employs differential channels to
the ADC to ensure high performance in mixed-signal applications.
The front end also includes a 3-channel input mux that enables
multiple composite video signals to be applied to the ADV7180.
Current clamps are positioned in front of the ADC to ensure
that the video signal remains within the range of the converter.
A resistor divider network is required before each analog input
channel to ensure that the input signal is kept within the range
of the ADC (see Figure 29). Fine clamping of the video signal
is performed downstream by digital fine clamping within the
Table 1 shows the three ADC clocking rates that are determined by
the video input format to be processed—that is, INSEL[3:0].
These clock rates ensure 4× oversampling per channel for CVBS
mode and 2× oversampling per channel for Y/C and YPrPb modes.
Table 1. ADC Clock Rates
Input Format
ADC Clock Rate (MHz)1
Oversampling
Rate per Channel
CVBS
57.27
4×
Y/C (S-Video)2
86
2×
YPrPb
86
2×
1
Based on a 28.6363 MHz crystal between the XTAL and XTAL1 pins.
2
See INSEL[3:0] in Table 107 for the mandatory write for Y/C (S-Video) mode.
STANDARD DEFINITION PROCESSOR
The ADV7180 is capable of decoding a large selection of baseband
video signals in composite, S-Video, and component formats.
The video standards supported by the video processor include
PAL B/D/I/G/H, PAL 60, PAL M, PAL N, PAL Nc, NTSC M/J,
NTSC 4.43, and SECAM B/D/G/K/L. The ADV7180 can auto-
matically detect the video standard and process it accordingly.
The ADV7180 has a five-line, superadaptive, 2D comb filter
that gives superior chrominance and luminance separation
when decoding a composite video signal. This highly adaptive filter
automatically adjusts its processing mode according to the video
standard and signal quality without requiring user intervention.
Video user controls such as brightness, contrast, saturation, and
hue are also available with the ADV7180.
The ADV7180 implements a patented ADLLT algorithm to
track varying video line lengths from sources such as a VCR.
ADLLT enables the ADV7180 to track and decode poor quality
video sources such as VCRs and noisy sources from tuner outputs,
VCD players, and camcorders. The ADV7180 contains a chroma
transient improvement (CTI) processor that sharpens the edge
rate of chroma transitions, resulting in sharper vertical transitions.
The video processor can process a variety of VBI data services,
such as closed captioning (CCAP), wide screen signaling (WSS),
copy generation management system (CGMS), EDTV, Gemstar
1×/2×, and extended data service (XDS). Teletext data slicing
for world standard teletext (WST), along with program delivery
control (PDC) and video programming service (VPS), are
provided. Data is transmitted via the 8-bit video output port as
ancillary data packets (ANC). The ADV7180 is fully Macrovision
certified; detection circuitry enables Type I, Type II, and Type III
protection levels to be identified and reported to the user. The
decoder is also fully robust to all Macrovision signal inputs.
Table 2. ADV7180 Selection Guide
Part Number1
Package Type
Analog Inputs
Digital Outputs
Temperature Grade
ADV7180KCP32Z
32-lead LFCSP
3
8-bit
10°C to +70°C
ADV7180WBCP32Z (Automotive)
32-lead LFCSP
3
8-bit
40°C to +85°C
ADV7180BCPZ
40-lead LFCSP
3
8-bit
40°C to +85°C
ADV7180WBCPZ (Automotive)
40-lead LFCSP
3
8-bit
40°C to +125°C
ADV7180BSTZ
64-lead LQFP
6
8-bit/16-bit
40°C to +85°C
ADV7180WBSTZ (Automotive)
64-lead LQFP
6
8-bit/16-bit
40°C to +125°C
ADV7180WBST48Z (Automotive)
48-lead LQFP
6
8-bit
40°C to +85°C
1
W = Automotive qualification completed.
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