AD9776BSVZ

Digital To Analog Converters Overview

The AD9776BSVZ is a dual-channel, 12-bit digital-to-analog converter (DAC) from Analog Devices, operating at a sample rate of 1 GSPS. It features an internal reference voltage of 1.2 V and supports analog supply voltages between 3.13 V and 3.47 V, with digital supplies at 1.8 V and 3.3 V. The device utilizes a parallel data interface and is housed in a 100-lead TQFP package with an exposed paddle. Key performance metrics include a typical SFDR of 78 dBc up to 100 MHz output frequency and a single-carrier WCDMA ACLR of 79 dBc at 80 MHz IF.

Digital To Analog Converters Feature Summary

• Dual 12-bit DACs with 1 GSPS sampling rate for multicarrier generation up to Nyquist frequency
• Integrated 2×, 4×, and 8× interpolator/coarse complex modulator for flexible carrier placement
• Adjustable full-scale output current ranging from 8.7 mA to 31.7 mA
• Internal 1.2 V reference and auxiliary DACs for external VGA and offset control

Digital To Analog Converters Applications

• Wireless infrastructure systems including WCDMA, CDMA2000, TD-SCDMA, WiMax, and GSM
• Digital high or low intermediate frequency (IF) synthesis
• Internal digital upconversion capability in transmit chains
• Transmit diversity applications
• Wideband communications such as LMDS/MMDS and point-to-point links

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'B' against the manufacturer's official ordering guide to confirm temperature range, packaging type, and revision status. Ensure compatibility with the required 100-lead TQFP footprint and thermal management requirements, as the exposed paddle must be soldered to the PCB for optimal thermal resistance.

Digital To Analog Converters Selection Notes

Select this component when a dual-channel 12-bit resolution is required alongside high-speed 1 GSPS operation. Consider the integrated interpolation filters if reducing host processor bandwidth is necessary. Verify that the system can accommodate the specified 1.8 V and 3.3 V power domains and that the differential clock input requirements align with the source driver capabilities.

Digital To Analog Converters Part Context

This part belongs to the AD9776/AD9778/AD9779 family of high dynamic range DACs. While sharing the same package and core architecture, the AD9776 is distinguished by its 12-bit resolution, whereas the AD9778 offers 14 bits and the AD9779 provides 16 bits. All variants support the same 1 GSPS sample rate and feature set.

Digital To Analog Converters Replacement Considerations

The AD9778BSVZ and AD9779BSVZ are pin-compatible members of the same family offering higher resolutions (14-bit and 16-bit, respectively). Direct substitution requires verifying that the increased resolution does not exceed the bandwidth or processing capabilities of the upstream digital source.