AD9781BCPZ

Digital To Analog Converters Overview

The AD9781BCPZ is a dual-channel, 14-bit digital-to-analog converter (DAC) from Analog Devices Inc., operating at sample rates up to 500 MSPS. It features an LVDS interface with dual-port or interleaved single-port operation and differential analog current outputs programmable from 8.6 mA to 31.7 mA full scale. The device includes auxiliary 10-bit current DACs for external offset nulling and an internal 1.2 V precision reference. It operates from 1.8 V and 3.3 V supplies with typical power dissipation of 315 mW. The component is housed in a small footprint, RoHS-compliant, 72-lead LFCSP package.

Digital To Analog Converters Feature Summary

• Dual 14-bit DACs with high dynamic range and low noise/intermodulation distortion
• LVDS inputs supporting dual-port or optional interleaved single-port data interfaces
• Proprietary switching output stage enabling usable analog outputs beyond the Nyquist frequency
• Integrated auxiliary 10-bit current DACs with source/sink capability for offset compensation

Digital To Analog Converters Applications

• Wireless infrastructure systems including W-CDMA, CDMA2000, TD-SCDMA, and WiMAX
• Wideband communications such as LMDS/MMDS and point-to-point links
• RF signal generators and arbitrary waveform generators

Digital To Analog Converters Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature range. Confirm that the 72-lead LFCSP package requirements are met during PCB design. Ensure supply voltages align with the specified 1.8 V and 3.3 V rails for proper operation.

Digital To Analog Converters Selection Notes

Select the AD9781BCPZ when a 14-bit resolution is required for dual-channel applications. Consider this part for direct conversion transmit architectures due to its integrated gain and offset compensation features. Verify compatibility with analog quadrature modulators if used in RF front-end designs.

Digital To Analog Converters Part Context

The AD9781 is part of the AD9780/AD9781/AD9783 family, which shares pin compatibility and functional architecture. These devices offer 12-, 14-, and 16-bit resolutions respectively, all supporting up to 500 MSPS sampling rates. The family is designed for high dynamic range performance in wireless infrastructure applications.

Digital To Analog Converters Replacement Considerations

Pin-compatible alternatives within the same family include the AD9780 (12-bit) and AD9783 (16-bit). Verify resolution requirements before substitution to ensure system accuracy specifications are maintained.