Document
GS2972
3G/HD/SD-SDI Serializer with Complete SMPTE Audio & Video Support
Key Features
• Operation at 2.970Gb/s, 2.970/1.001Gb/s, 1.485Gb/s, 1.485/1.001Gb/s and 270Mb/s
• Supports SMPTE ST 425 (Level A and Level B), SMPTE ST 424, SMPTE ST 292, SMPTE ST 259-C and DVB-ASI
• Integrated Cable Driver
• Integrated, low-noise VCO
• Integrated Narrow-Bandwidth PLL
• Integrated Audio Embedder for up to 8 channels of 48kHz audio
• Ancillary data insertion
• Optional conversion from SMPTE ST 425 Level A to Level B for 1080p 50/60 4:2:2 10-bit
• Parallel data bus selectable as either 20-bit or 10-bit
• SMPTE video processing including TRS calculation and insertion, line number calculation and insertion, line based CRC calculation and insertion, illegal code re-mapping, SMPTE ST 352 payload identifier generation and insertion
• GSPI host interface
• +1.2V digital core power supply, +1.2V and +3.3V analog power supplies, and selectable +1.8V or +3.3V I/O power supply
• -20ºC to +85ºC operating temperature range
• Low power operation (typically at 400mW, including Cable Driver)
• Small 11mm x 11mm 100-ball BGA package
• Pb-free and RoHS compliant
Applications
Application: 1080p 50/60 Camera/Camcorder
MIC ADC
Audio Processor
AUDIO 1/ 2 Audio Clocks
AES - IN
AUDIO 3/4
OPTICS
CCD
Video Processor
20-bit
HV F/PCLK
GS2972
CTRL/TIME CODE
3G-SDI
Storage : Tape/Disc /Solid State
HD-SDI Link A
EQ
GS2974B
HD-SDI Link B
EQ
GS2974B
Application: Dual Link (HD-SDI) to Single Link (3G-SDI) Converter
HD-SDI Deserializer
(GS1559 or GS2970)
10-bit
HV F/PCLK
FIFO
WR
HD-SDI Deserializer
(GS1559 or GS2970)
10-bit
HV F/PCLK
FIFO
WR
10-bit
HV F/PCLK
10-bit
GS2972
3G-SDI
GS4910
HVF X TAL
Application: Multi-format Audio Embedder Module
SD/HD/3G-SDI
EQ
GS2974B
GS2970
HVF
10-bit
P CLK
Audio Clocks
GS4911
GS2972
SD/HD/3G-SDI
X TAL
AES Audio Inputs
Analog Audio Inputs
SRC ADC
Switch Logic
&
Buffers
AUDIO 1/ 2 AUDIO 3/ 4 AUDIO 5/ 6 AUDIO 7/ 8
GS2972 3G/HD/SD-SDI Serializer with Complete SMPTE Audio & Video Support Final Data Sheet Rev. 9 GENDOC-047479 September 2013
www.semtech.com
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Application: Multi-format Digital VTR/Video Server
V ideo Inputs
Storage : Tape/HDD/Solid State
Video Processor
Audio Processor
20-bit
HV F /P CLK
AUDIO 1/ 2 AUDIO 3/ 4 AUDIO 5/ 6 AUDIO 7/ 8 Audio Clocks
Audio Inputs
GS4911
X TAL
GS2972
Sync Seperator
3G-SDI
Analog Sync
Application: Multi-format Presentation Switcher (Output Stage)
DVE
P rogram AE S In P reset AE S In V oice-Over
AE S from Input Dem ux
Audio Mixer
P rogram AE S Out P review AE S Out
I2S Audio + Clocks
10-bit + Clk
GS2972
SD/HD/3G-SDI Auxiliary
Mixers
KeyK&KeyeFeyriellr
Key/Fill Inputs
20-bit + Clk Logo Inserter 20-bit + Clk
Image Store
GS2972
SD/HD/3G-SDI Preview
GS2972
SD/HD/3G-SDI Program
Analog Sync
Sync Seperator
GS4911
Clock & Sync Distribution
X TAL
Application: 3Gb/s SDI Test Signal Generator
Analog Sync
Sync Seperator
X TAL
GS4911
HV F/PCLK
Audio Clocks
Memory
Video Signal
Generator
20-bit
HV F/PCLK
Audio Generator
AES 1/2 AES 3/4 AES 5/6 AES 7/8
GS2972
3G-SDI
Description
The GS2972 is a complete SDI Transmitter, generating a SMPTE ST 424, SMPTE ST 292, SMPTE ST 259-C or DVB-ASI compliant serial digital output signal.
The integrated Narrow BW PLL allows the device to accept parallel clocks with high input jitter, and still provide a SMPTE compliant serial digital output.
The device can operate in four basic user selectable modes: SMPTE mode, DVB-ASI mode, Data-Through mode, or Standby mode.
In SMPTE mode, the GS2972 performs all SMPTE processing features. Both SMPTE ST 425 Level A and Level B formats are supported with optional conversion from Level A to Level B for 1080p 50/60 4:2:2 10-bit.
In DVB-ASI mode, the device will perform 8b/10b encoding prior to transmission.
In Data-Through mode, all SMPTE and DVB-ASI processing is disabled. The device can be used as a simple parallel to serial converter.
The device can also operate in a lower power Standby mode. In this mode, no signal is generated at the output.
The GS2972 integrates a fully SMPTE-compliant Cable Driver for SMPTE ST 259-C, SMPTE ST 292 and SMPTE ST 424 interfaces. It features automatic dual slew-rate selection, depending on 3Gb/s or HD or SD operational requirements.
In accordance with SMPTE ST 272 and SMPTE ST 299, up to eight channels (two audio groups) of serial digital audio may be embedded into the video data stream.The input audio signal formats supported by the device include AES/EBU, I2S and serial audio. 16, 20 and 24-bit audio formats are supported at 48kHz synchronous for SD modes and 48kHz synchronous or asynchronous in HD, 3Gb/s modes.
GS2972 3G/HD/SD-SDI Serializer with Complete SMPTE Audio & Video Support Final Data Sheet Rev. 9 GENDOC-047479 September 2013
www.semtech.com
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Functional Block Diagram
Shared JTAG and GSPI pins (for drop-in compatibility
with GS1572/82)
Dedicated JTAG pins
DVB_ASI CORE_VDD CORE_G.