AD9785BSVZRL

Digital To Analog Converters Overview

The AD9785BSVZRL is a dual-channel, 12-bit digital-to-analog converter (DAC) from Analog Devices, operating at a maximum sample rate of 800 MSPS. It features low power 32-bit complex numerically controlled oscillators (NCOs) for carrier placement within the DAC bandwidth. The device includes internal digital upconversion, auxiliary DACs for I/Q gain and offset control, and programmable phase compensation. It utilizes a parallel CMOS data interface and operates on 1.8 V and 3.3 V supplies. Key performance metrics include a differential nonlinearity (DNL) of ±0.2 LSB and an integral nonlinearity (INL) of ±0.3 LSB. The component is housed in a 100-lead TQFP package with an exposed pad.

Digital To Analog Converters Feature Summary

• Dual 12-bit DAC architecture with 800 MSPS sampling rate
• Integrated low power 32-bit complex NCO (<300 mW)
• Auxiliary DACs for I/Q gain matching and offset control
• Internal digital upconversion and inverse sinc filter

Digital To Analog Converters Applications

• Wireless infrastructure base stations
• Digital high or low IF synthesis
• Transmit diversity systems
• Wideband communications including W-CDMA and CDMA2000

Digital To Analog Converters Procurement Notes

Verify the ordering suffix 'RL' indicates tape and reel packaging when sourcing. Confirm the specific revision level against the manufacturer's datasheet to ensure compatibility with design requirements. Check for moisture sensitivity levels and storage conditions prior to assembly.

Digital To Analog Converters Selection Notes

Select the AD9785 variant specifically for 12-bit resolution requirements; other family members offer 14-bit or 16-bit options. Ensure the system clock frequency supports the desired interpolation mode (1x, 2x, 4x, or 8x). Verify that the required full-scale output current range (8.7 mA to 31.7 mA) aligns with the downstream analog modulator input specifications.

Digital To Analog Converters Part Context

This component belongs to the TxDAC® family of high dynamic range converters manufactured on a 0.18 μm CMOS process. It is designed to interface seamlessly with analog quadrature modulators. The part number suffix 'BSVZRL' denotes the temperature grade, package type, and reel packaging configuration.

Digital To Analog Converters Replacement Considerations

Direct pin-compatible replacements within the same family include the AD9787 (14-bit) and AD9788 (16-bit), though resolution differences must be accounted for. Cross-family comparisons should consider the AD9779 series for higher speed applications.