AD9785BSVZ

Digital To Analog Converters Overview

The AD9785BSVZ is a dual-channel, 12-bit digital-to-analog converter (DAC) from Analog Devices, operating at sample rates up to 800 MSPS. It integrates low-power 32-bit complex numerically controlled oscillators (NCOs), auxiliary DACs for gain and offset control, and programmable phase compensation. The device features an internal reference, digital inverse sinc filter, and high-performance PLL clock multiplier. It operates on 1.8 V and 3.3 V supplies, housed in a 100-lead TQFP package with an exposed pad.

Digital To Analog Converters Feature Summary

• Dual 12-bit DACs with 800 MSPS maximum sample rate
• Integrated 32-bit complex NCO for carrier placement
• Auxiliary DACs for I/Q gain matching and offset control
• Internal 1.2 V voltage reference and digital inverse sinc filter

Digital To Analog Converters Applications

• Wireless infrastructure base stations
• W-CDMA, CDMA2000, TD-SCDMA, WiMAX, GSM systems
• Digital high or low IF synthesis
• Transmit diversity applications

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'BSVZ' against the manufacturer's current ordering guide to confirm package type and temperature range. Confirm RoHS compliance status via the official datasheet revision history. Check for any product change notifications (PCNs) that may affect pinout or electrical specifications.

Digital To Analog Converters Selection Notes

Select this component when a dual-channel 12-bit resolution is required at speeds up to 800 MSPS. Consider the AD9787 or AD9788 if higher resolution (14-bit or 16-bit) is needed, as they share the same pinout and interface. Ensure the design supports the required 1.8 V and 3.3 V power domains and LVDS clocking requirements.

Digital To Analog Converters Part Context

The AD9785 is part of the AD978x family, which includes the AD9787 (14-bit) and AD9788 (16-bit). These devices are designed for direct conversion transmit applications and feature pin-compatible layouts. They utilize a 0.18 μm CMOS process and are optimized for interfacing with analog quadrature modulators.

Digital To Analog Converters Replacement Considerations

The AD9787BSVZ and AD9788BSVZ are pin-compatible alternatives offering 14-bit and 16-bit resolutions, respectively. Verify that the system can accommodate the different data widths and that the dynamic performance metrics meet the application requirements.

Digital To Analog Converters FAQ

What is the full-scale output current range?

The full-scale output current is programmable over a range of approximately 8.66 mA to 31.66 mA.

Does the AD9785 have an internal reference?

Yes, it includes an internal 1.2 V voltage reference with an output resistance of 5 kΩ.

What is the differential nonlinearity (DNL) specification?

The DNL is specified as ±0.2 LSB typical and ±0.2 LSB maximum.