AD9776ABSVZRL

Digital To Analog Converters Overview

The AD9776ABSVZRL is a dual-channel, 12-bit digital-to-analog converter (DAC) from Analog Devices Inc., operating at a sample rate of 1 GSPS. It utilizes an advanced 0.18 μm CMOS process and features internal 2×, 4×, and 8× interpolators with coarse complex modulation for flexible carrier placement. The device operates on 3.3 V analog/digital supplies and 1.8 V clock/digital supplies, consuming 1.0 W at maximum speed. Key specifications include ±0.86 LSB INL, ±0.1 LSB DNL, and adjustable full-scale output current ranging from 8.7 mA to 31.7 mA. It is housed in a 100-lead TQFP package with an exposed paddle.

Digital To Analog Converters Feature Summary

• Dual-channel architecture with 12-bit resolution and 1 GSPS sampling rate
• Integrated 2×, 4×, and 8× interpolation filters with complex modulator capability
• Adjustable full-scale output current from 8.7 mA to 31.7 mA
• Internal reference voltage of 1.2 V with low noise PLL clock multiplier

Digital To Analog Converters Applications

• Wireless infrastructure including W-CDMA, CDMA2000, TD-SCDMA, WiMax, GSM, and LTE
• Digital high or low IF synthesis
• Direct conversion transmit applications requiring complex digital modulation
• Wideband communications such as LMDS/MMDS and point-to-point links

Digital To Analog Converters Procurement Notes

Verify the component authenticity by checking the manufacturer marking against the official datasheet revision history. Confirm the suffix 'RL' indicates tape and reel packaging if required for automated assembly. Ensure the specific grade 'A' matches the operational temperature range and performance specifications defined in the DC and AC electrical characteristics tables.

Digital To Analog Converters Selection Notes

Select this model when 12-bit resolution is sufficient for the application, as higher variants like the AD9778A (14-bit) and AD9779A (16-bit) offer greater precision but may differ in power consumption and cost. Consider the 100-lead TQFP package constraints and thermal requirements, specifically soldering the exposed paddle to the ground plane for optimal heat dissipation. Verify that the system supports the required 3-wire serial interface for configuration.

Digital To Analog Converters Part Context

This part belongs to the AD9776A/AD9778A/AD9779A family of high dynamic range DACs. While sharing the same 1 GSPS sample rate and general architecture, the AD9776A is distinguished by its 12-bit resolution compared to the 14-bit AD9778A and 16-bit AD9779A. All variants share similar power supply requirements and package options, allowing for pin-compatible design upgrades within the same signal chain.

Digital To Analog Converters Replacement Considerations

The AD9776ABSVZ is the leaded equivalent of this tape-and-reel variant. For resolution changes, the AD9778A and AD9779A are pin-compatible alternatives offering 14-bit and 16-bit resolution respectively. No other direct substitutes from different manufacturers are documented in the provided source material.