AD9764AR

Digital To Analog Converters Overview

The AD9764AR is a 14-bit, 125 MSPS TxDAC® digital-to-analog converter manufactured by Analog Devices Inc. It features differential current outputs with a nominal full-scale range of 2 mA to 20 mA and operates on a single supply voltage between 2.7 V and 5.5 V. The device integrates an edge-triggered input latch and a 1.20 V temperature-compensated bandgap reference. Key performance metrics include a settling time of 35 ns (to 0.1%), INL of ±2.5 LSB, and DNL of ±1.5 LSB at +25°C. Power dissipation ranges from 190 mW at 5 V to 45 mW at 3 V, with a power-down mode reducing standby consumption to approximately 25 mW.

Digital To Analog Converters Feature Summary

• 14-bit resolution with 125 MSPS update rate
• Differential current outputs adjustable from 2 mA to 20 mA
• Integrated 1.20 V bandgap reference and edge-triggered latches
• Single-supply operation (2.7 V to 5.5 V) with low power consumption

Digital To Analog Converters Applications

• Communication transmit channels for base stations
• ADSL/HFC modems
• Instrumentation systems

Digital To Analog Converters Procurement Notes

Verify the package type upon ordering, as the 'AR' suffix denotes the 28-lead SOIC variant. Confirm RoHS compliance status, as historical documentation indicates variations in lead finish options within the product line. Ensure the specific revision of the datasheet matches the manufacturing date code for accurate electrical parameter validation.

Digital To Analog Converters Selection Notes

Select this component when high dynamic performance, specifically SFDR and IMD, is required for communication transmit paths. The segmented current source architecture minimizes spurious components compared to standard CMOS DACs. Consider the 28-lead SOIC package constraints regarding thermal resistance (71.4°C/W) and board space requirements for heat dissipation during continuous operation.

Digital To Analog Converters Part Context

The AD9764 is part of the TxDAC® family, which includes pin-compatible 8-, 10-, and 12-bit variants (e.g., AD9708, AD9760, AD9762). This design allows designers to scale resolution and performance up or down while maintaining identical interface options and pinouts, simplifying component selection based on cost and performance needs.

Digital To Analog Converters Replacement Considerations

Pin-compatible alternatives within the TxDAC family include the AD9762 (12-bit), AD9760 (10-bit), and AD9708 (8-bit). These devices share the same 28-lead SOIC/TSSOP footprint and interface logic, allowing for direct substitution if lower resolution is acceptable.