AD9761ARS

Digital To Analog Converters Overview

The AD9761ARS is a dual-channel, high-speed 10-bit CMOS digital-to-analog converter (DAC) from Analog Devices. It integrates two 40 MSPS DACs with dual 2x interpolation filters and an on-chip 1.20 V voltage reference. The device supports a single 10-bit parallel data bus for interleaved I and Q input streams, de-interleaving them into separate paths processed by matching FIR filters. Operating on a single supply of 3 V to 5.5 V, it features differential current outputs with a nominal full-scale current of 10 mA. Key performance metrics include a Signal-to-Noise and Distortion Ratio (SINAD) of 59 dB and a Spurious-Free Dynamic Range (SFDR) of 71 dB at 1 MHz output.

Digital To Analog Converters Feature Summary

• Dual 10-bit DACs with 40 MSPS update rate and 2x digital interpolation filters
• Integrated 1.20 V temperature-compensated band gap voltage reference
• Differential current outputs with excellent gain and offset matching between channels
• Single 10-bit parallel interface supporting interleaved I/Q data streams

Digital To Analog Converters Applications

• Wideband communication systems requiring I and Q modulation
• Spread spectrum transmit applications
• Direct conversion transmitter architectures

Digital To Analog Converters Procurement Notes

Verify the specific ordering suffix 'ARS' corresponds to the 28-lead Shrink Small Outline Package (SSOP) with RS-28 option as listed in the manufacturer's ordering guide. Confirm that the internal reference is enabled or disabled according to system design requirements, as this affects pin connections for REFLO and REFIO. Ensure power supply decoupling complies with the recommended values for COMP1, COMP2, and COMP3 nodes to maintain specified dynamic performance.

Digital To Analog Converters Selection Notes

Select the AD9761ARS when a complete dual-channel solution with integrated interpolation filtering is required to reduce external analog reconstruction filter complexity. The device is suitable for applications needing simultaneous updates of both channels with matched gain characteristics, eliminating the need for external calibration circuitry. Consider the 28-lead SSOP package constraints and the requirement for a single 10-bit digital bus interface when designing the host processor connection.

Digital To Analog Converters Part Context

The AD9761 belongs to the TxDAC+ family of dual transmit DACs. It is designed as a companion component to receive ADCs such as the AD9281 and AD9201 within the same product family. The 'ARS' designation specifically identifies the shrink small outline package variant, distinguishing it from other package options like the leadless chip carrier or reel-and-reel tape configurations available for the base AD9761 model.

Digital To Analog Converters Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material.