ADV7123KSTZ50

Digital To Analog Converters Overview

The ADV7123KSTZ50 is a triple high-speed video digital-to-analog converter (DAC) fabricated in a single monolithic CMOS chip. It integrates three independent 10-bit DACs with complementary outputs, designed for high-resolution color graphics and digital video systems. The device supports a maximum throughput rate of 50 MHz, as indicated by the '50' suffix grade. It features TTL-compatible inputs, an internal 1.235 V voltage reference, and operates on a single 5 V or 3.3 V supply. Key performance metrics include a Spurious-Free Dynamic Range (SFDR) of −70 dB at fCLK = 50 MHz and fOUT = 1 MHz. The component is housed in a 48-lead LQFP package and supports an industrial temperature range from −40°C to +85°C.

Digital To Analog Converters Feature Summary

• Triple 10-bit DAC architecture with complementary outputs for RGB signal generation.
• 50 MHz maximum clock frequency (grade K) with guaranteed monotonicity to 10 bits.
• Internal 1.235 V voltage reference and RS-343A/RS-170 compatible output levels.
• Low power consumption with standby mode reducing dissipation to 6 mW typical at 3 V.

Digital To Analog Converters Applications

• Digital video systems requiring up to 1600 × 1200 resolution at 100 Hz refresh rates.
• High-resolution color graphics displays and CAE/CAD/CAM applications.
• Video signal reconstruction and instrumentation.
• Image processing systems.

Digital To Analog Converters Procurement Notes

Verify the specific speed grade suffix 'K' corresponds to the required 50 MHz operational limit for the design. Confirm that the 48-lead LQFP package dimensions match the PCB footprint constraints. Ensure the power supply rails are stable within the specified ±5% tolerance for optimal linearity performance.

Digital To Analog Converters Selection Notes

Select this component when a 50 MHz data rate is sufficient, offering lower power consumption compared to higher-grade variants like the 240 MHz or 330 MHz versions. Verify compatibility with TTL logic levels for digital inputs. Consider the internal reference capability if external precision references are not available in the system design.

Digital To Analog Converters Part Context

The ADV7123 series includes variants with different speed grades, such as the 140 MHz (J), 240 MHz (J), and 330 MHz (J/K) models. The ADV7123KSTZ50 specifically denotes the 50 MHz grade version. All variants share the same pinout and functional block diagram but differ in maximum clock frequency specifications and associated dynamic performance characteristics.

Digital To Analog Converters Replacement Considerations

Direct replacements within the same family include other speed grades of the ADV7123 (e.g., ADV7123JSTZ140, ADV7123JSTZ240) if higher bandwidth is acceptable. For lower speed requirements, the ADV7120 (8-bit, 80 MHz) may be considered, though it lacks 10-bit resolution and complementary outputs.

Digital To Analog Converters FAQ

What is the maximum clock frequency for the ADV7123KSTZ50?

The maximum clock frequency for the ADV7123KSTZ50 is 50 MHz, as defined by the '50' grade suffix.

Does the ADV7123KSTZ50 require an external voltage reference?

No, it includes an internal voltage reference of 1.235 V, though an external reference can be used for potentially higher accuracy.

How is the full-scale output current determined?

The full-scale output current is set by connecting a resistor (RSET) between the RSET pin and ground. For nominal video levels into a doubly terminated 75 Ω load, RSET is typically 530 Ω.