AD9764ARZ

Digital To Analog Converters Overview

The AD9764ARZ is a 14-bit, 125 MSPS CMOS digital-to-analog converter (DAC) from the TxDAC family. It features differential current outputs adjustable from 2 mA to 20 mA and operates on single supplies of +3 V or +5 V. The device integrates edge-triggered input latches and a 1.20 V temperature-compensated bandgap reference. Key electrical parameters include a maximum update rate of 125 MSPS, settling time of 35 ns, and power dissipation ranging from 45 mW at 3 V to 190 mW at 5 V. It is housed in a 28-lead SOIC package.

Digital To Analog Converters Feature Summary

• 14-bit resolution with 125 MSPS update rate
• Differential current outputs: 2 mA to 20 mA
• On-chip 1.20 V reference with external override capability
• Edge-triggered latches for direct CMOS logic interface

Digital To Analog Converters Applications

• Communication transmit channels
• Base stations
• ADSL/HFC modems
• Instrumentation

Digital To Analog Converters Procurement Notes

Verify component authenticity through authorized Analog Devices distributors. Confirm RoHS compliance status via the manufacturer's official documentation. Ensure proper ESD handling protocols are followed during storage and assembly due to the sensitivity of the CMOS structure.

Digital To Analog Converters Selection Notes

Select this component for applications requiring high dynamic performance in low-power environments. The wide full-scale current adjustment allows optimization between power consumption and signal amplitude. Verify that the required output impedance exceeds 100 kΩ and that the supply voltage range aligns with the system's 2.7 V to 5.5 V specification.

Digital To Analog Converters Part Context

The AD9764ARZ is part of the TxDAC product family, which includes pin-compatible 8-, 10-, and 12-bit variants. This architecture allows designers to scale resolution and performance up or down while maintaining identical interface options and physical footprint across the series.

Digital To Analog Converters Replacement Considerations

Pin-compatible alternatives within the TxDAC family include the AD9744 (higher speed), AD9754 (similar performance), and AD9742 (lower resolution). Cross-model substitution requires verification of specific timing and linearity requirements against the target application constraints.

Digital To Analog Converters FAQ

How is the internal reference disabled?

Connect the REFLO pin to AVDD to disable the internal 1.20 V reference and allow an external reference voltage to be applied to the REFIO pin.

What is the function of the FS ADJ pin?

The FS ADJ pin connects to an external resistor (RSET) that sets the full-scale output current range, allowing adjustment between 2 mA and 20 mA.

Can the AD9764 operate with dual supplies?

Yes, the analog (AVDD) and digital (DVDD) supplies can operate independently within the 2.7 V to 5.5 V range, supporting various single or dual supply configurations.