ADV7128KR30-REEL

ADCs/DACs - Special Purpose Overview

The ADV7128KR30-REEL is a monolithic CMOS 10-bit video digital-to-analog converter (DAC) with a maximum clock rate of 30 MHz. It features a single +5 V power supply, TTL-compatible inputs, and a high-impedance current output capable of driving doubly terminated 75 Ω coaxial cables. The device guarantees monotonicity to 10 bits and includes an internal reference amplifier compensated via the COMP pin. Key static parameters include ±1 LSB integral and differential nonlinearity, a typical white level output current of 17.62 mA, and a power dissipation of approximately 350 mW at 30 MHz operation.

ADCs/DACs - Special Purpose Feature Summary

• 10-bit resolution with guaranteed monotonicity for linearization functions like gamma correction
• 30 MHz pipelined operation speed grade
• TTL-compatible digital inputs and RS-343A/RS-170 compatible analog outputs
• Single +5 V CMOS monolithic construction with low power dissipation

ADCs/DACs - Special Purpose Applications

• High Definition Television (HDTV)
• High Resolution Color Graphics Systems
• Digital Radio Modulation
• Direct Digital Synthesis (DDS) & I/O Modulation
• Video Signal Reconstruction

ADCs/DACs - Special Purpose Procurement Notes

Verify that the component matches the ADV7128KR30 speed grade, as the suffix indicates a 30 MHz maximum clock rate rather than the higher 80 MHz or 50 MHz variants. Confirm the REEL designation corresponds to tape-and-reel packaging requirements for automated assembly processes. Ensure the source documentation explicitly identifies the manufacturer as Analog Devices Inc. to avoid counterfeit parts.

ADCs/DACs - Special Purpose Selection Notes

Select this part when a 30 MHz pixel clock is sufficient for the target display resolution and refresh rate. The RSET resistor value determines the full-scale output current; a standard 560 Ω resistor yields typical RS-343A levels. An external 1.23 V reference such as the AD589 is required. Ensure the PCB layout provides separate analog and digital ground planes connected via ferrite beads to minimize noise coupling.

ADCs/DACs - Special Purpose Part Context

The ADV7128 series comprises three speed grades: 80 MHz (ADV7128KR80), 50 MHz (ADV7128KR50), and 30 MHz (ADV7128KR30). All variants share identical 10-bit architecture, pinout, and functional characteristics within the SOIC-28 package. The KR30 variant offers lower power consumption and reduced dynamic performance requirements compared to the faster models, making it suitable for cost-sensitive applications where high bandwidth is not critical.

ADCs/DACs - Special Purpose Replacement Considerations

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