AD9789BBCZ

Digital To Analog Converters Overview

The AD9789BBCZ is a 14-bit, 2400 MSPS RF digital-to-analog converter (DAC) featuring integrated four-channel signal processing. It combines QAM encoders with square root raised cosine (SRRC) filters, 16× to 512× interpolation, rate converters, and digital upconverters. The device supports flexible data interfaces of 4, 8, 16, or 32 bits wide using LVDS or CMOS standards. Operating from 1.5 V, 1.8 V, and 3.3 V supplies, it consumes approximately 1.6 W at full speed. It is housed in a 164-ball CSP-BGA package.

Digital To Analog Converters Feature Summary

• Integrated four-channel QAM mapper/interpolator/upconverter for direct synthesis of DOCSIS- or DVB-C-compatible channels
• Flexible digital interface supporting 4, 8, 16, or 32-bit widths with LVDS or CMOS modes up to 150 MHz
• On-chip rate converter and digital upconverter allowing channel placement from DC to 0.5 × fDAC
• Built-in self-test (BIST) support with internal random number generator and input connectivity check

Digital To Analog Converters Applications

• Broadband communications systems
• CMTS/DVB cable infrastructure
• Cellular base station infrastructure
• Point-to-point wireless links

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'BBCZ' against the manufacturer's ordering guide to confirm the exact package type and temperature range. Confirm RoHS compliance status and moisture sensitivity level requirements for the assembly process. Ensure the design accommodates the required analog and digital supply voltages (AVDD33, DVDD33, CVDD18, DVDD18, DVDD15).

Digital To Analog Converters Selection Notes

Select this component when high integration of digital signal processing is required alongside high-speed conversion. The AD9789 is suitable for applications needing direct RF synthesis without external mixers. Consider the power dissipation of 1.6 W and the thermal resistance characteristics of the 164-ball BGA package during PCB layout.

Digital To Analog Converters Part Context

The AD9789 belongs to Analog Devices' family of high-performance RF DACs designed for transmit chains. It integrates complex digital signal processing functions typically handled by separate components, reducing board space and system complexity. The BBCZ designation indicates the specific commercial grade packaging variant within the AD9789 product line.

Digital To Analog Converters Replacement Considerations

Direct pin-compatible replacements are not explicitly listed in the provided documentation. Evaluate other ADI RF DACs such as the AD9739 or AD9779 if architectural differences are acceptable. Verify that any substitute maintains the required 14-bit resolution and 2400 MSPS update rate.

Digital To Analog Converters FAQ

What is the maximum supported data interface width?

The AD9789 supports a flexible data interface configurable for 4, 8, 16, or 32 bits wide.

Does the device include an internal voltage reference?

Yes, the AD9789 includes an internal bandgap voltage reference with an output impedance of approximately 5 kΩ.

What is the minimum interpolation factor?

The minimum interpolation factor is 16×, resulting in an adjusted DAC update rate of 150 MSPS when operating at 2400 MSPS.