The THS8133 is a general-purpose triple high-speed D/A converter (DAC) optimized for use in video/graphics applications. The device operates from a 5-V analog supply and a 3-V to 5-V range digital supply. The THS8133 has a sampling rate up to 80 MSPS. The device consists of three 10-bit D/A converters and additional circuitry for bi-level/tri-level sync and blanking level generation in video applications.
●THS8133 is also well suited in applications where multiple well-matched and synchronously operating DACs are needed; for example, I-Q modulation and direct-digital synthesis in communications equipment.
●The current-steering DACs can be directly terminated in resistive loads to produce voltage outputs. The device provides a flexible configuration of maximum output current drive. Its output drivers are specifically designed to produce standard video output levels when directly connected to a single-ended doubly-terminated 75 coaxial cable. Full-scale video/sync are generated in a 7:3 ratio, compliant with SMPTE standards for GBR and YPbPr signals.
●Furthermore, the THS8133 can generate both a traditional bi-level sync or a tri-level sync signal, as per the SMPTE standards, via a digital control interface. The sync signal is inserted on one of the analog output channels (sync-on-green/luminance) or on all output channels. Also, a blanking control signal sets the outputs to defined levels during the nonactive video window.
●Finally the input format can be either 3×10 bit 4:4:4, 2×10 bit 4:2:2, or 1×10 bit 4:2:2. This enables a direct interface to a wide range of video DSP/ASICs including parts generating ITU-BT.656 formatted output data.
● Triple 10-bit D/A Converters
● Minimum 80 MSPS Operation
● Direct Drive of Doubly-Terminated 75- Load Into Standard Video Levels
● 3×10 Bit 4:4:4, 2×10 Bit 4:2:2 or 1×10 Bit 4:2:2 (ITU-BT.656) Multiplexed YPbPr/GBR Input Modes
● Bi-Level (EIA) or Tri-Level (SMPTE) Sync Generation With 7:3 Video/Sync Ratio
● Integrated Insertion of Sync-On-Green/
●Luminance or Sync-On-All Channels
● Configurable Blanking Level
● Internal Voltage Reference
● Applications
● High-Definition Television (HDTV) Set-Top Boxes/Receivers
● High-Resolution Image Processing
● Desktop Publishing
● Direct Digital Synthesis/I-Q Modulation
●PowerPAD is a trademark of Texas Instruments.
●See ALSO: THS8134 (8 bit, pin-compatible)
