Data Sheet
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
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.
ADV7180
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
automatically 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.
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 27). Fine clamping of the video signal
is performed downstream by digital fine clamping within the
ADV7180.
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
CVBS
Y/C (S-Video)
YPrPb
1
2
ADC Clock Rate (MHz)
57.27
86
86
Oversampling
Rate per Channel
4×
2×
2×
Based on a 28.6363 MHz crystal between the XTAL and XTAL1 pins.
See INSEL[3:0] in Table 107 for the mandatory write for Y/C (S-Video) mode.
Table 2. ADV7180 Selection Guide
Part Number
ADV7180KCP32Z
ADV7180WBCP32Z (Automotive)
ADV7180BCPZ
ADV7180WBCPZ (Automotive)
ADV7180BSTZ
ADV7180WBSTZ (Automotive)
ADV7180WBST48Z (Automotive)
1
Package Type
32-lead LFCSP
32-lead LFCSP
40-lead LFCSP
40-lead LFCSP
64-lead LQFP
64-lead LQFP
48-lead LQFP
Analog Inputs
3
3
3
3
6
6
6
Digital Outputs
8-bit
8-bit
8-bit
8-bit
8-bit/16-bit
8-bit/16-bit
8-bit
Temperature Grade
−10°C to +70°C
−40°C to +85°C
−40°C to +85°C
−40°C to +125°C
−40°C to +85°C
−40°C to +125°C
−40°C to +85°C
Automotive qualification completed.
Rev. G | Page 5 of 120
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