ADV7120KSTZ50

Digital To Analog Converters Overview

The ADV7120KSTZ50 is a triple 8-bit video digital-to-analog converter (DAC) from Analog Devices, designed for high-resolution color graphics and video systems. Operating at a maximum clock rate of 50 MHz, it integrates three independent DAC channels for Red, Green, and Blue signals. The device features TTL-compatible digital inputs and outputs compliant with RS-343A and RS-170 standards. It requires a single +5 V supply and an external 1.23 V reference voltage. Packaged in a 48-lead Thin Quad Flatpack (TQFP), the monolithic CMOS construction ensures low power dissipation and high performance for applications such as image processing and direct digital synthesis.

Digital To Analog Converters Feature Summary

• Triple 8-bit D/A converters with 50 MHz pipelined operation
• RS-343A/RS-170 compatible analog current outputs
• TTL compatible digital input interface
• Integrated composite sync, blank, and reference white controls

Digital To Analog Converters Applications

• High resolution color graphics displays
• CAE/CAD/CAM applications
• Image processing systems
• Video signal reconstruction
• Direct Digital Synthesis (DDS) and I/Q modulation

Digital To Analog Converters Procurement Notes

Verify the speed grade suffix matches the required operational frequency. The '50' suffix indicates a 50 MHz version. Confirm the package type corresponds to the TQFP form factor. Ensure the temperature range aligns with industrial requirements if extended ranges are needed. Cross-reference the ordering guide to confirm availability of specific speed grades within the ADV7120 series.

Digital To Analog Converters Selection Notes

Select the ADV7120KSTZ50 when a 50 MHz update rate is sufficient for the target resolution and refresh rate. Compare against the KST30 variant if lower power consumption or slower speeds are acceptable. Ensure the system provides a stable 1.23 V reference voltage via the VREF pin. Verify that the PCB layout supports separate analog and digital ground planes to maintain signal integrity and minimize noise coupling between the RGB channels.

Digital To Analog Converters Part Context

The ADV7120 series includes variants with different speed grades: 30 MHz (KST30), 50 MHz (KSTZ50), and 80 MHz (KN80/KP80). The KSTZ50 specifically denotes the 50 MHz performance tier housed in a 48-lead TQFP package. Other packages include 40-pin DIP and 44-pin PLCC options for different board space constraints. All variants share the same functional architecture and pinout compatibility.

Digital To Analog Converters Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.