AD9772AST

Digital To Analog Converters Overview

The AD9772AST is a single-channel, 14-bit digital-to-analog converter (DAC) from Analog Devices, operating at a maximum sampling rate of 160 MSPS. It utilizes CMOS technology and features an integrated two-times interpolation filter and a phase-locked loop (PLL) for clock generation. The device accepts parallel data inputs and provides differential current outputs. It operates on a single 3.3 V supply for both analog and digital domains, with a power dissipation of 272 mW. Key performance metrics include a signal-to-noise ratio (SNR) of 71 dB, differential nonlinearity (DNL) of ±2 LSB, and integral nonlinearity (INL) of ±3.5 LSB. The unit is housed in a 48-lead LQFP package and functions within a temperature range of -40°C to +85°C.

Digital To Analog Converters Feature Summary

• Integrated 2x interpolation FIR filter enhances time-domain resolution by inserting zeros between original samples.
• On-chip PLL generates internal clocks and control signals, supporting flexible single-ended or differential clock inputs.
• Dual-mode operation allows bypassing the PLL for input data rates below 6 MSPS to improve phase noise performance.
• Provides differential current outputs suitable for direct coupling to transformers or amplifiers.

Digital To Analog Converters Applications

• Baseband waveform reconstruction for communication systems.
• Intermediate frequency (IF) signal synthesis.
• Quadrature Phase Shift Keying (QPSK) modulation applications.

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'AST' against official Analog Devices documentation to confirm pinout compatibility and temperature grade. The 'AST' designation typically indicates a lead-free RoHS-compliant version in the LQFP-48 package. Confirm availability status as distribution channels may list restricted supply conditions. Ensure the ordering part number matches the exact electrical specifications required for the design.

Digital To Analog Converters Selection Notes

Select the AD9772AST when a 14-bit resolution and 160 MSPS update rate are required for single-channel applications. The integrated interpolation filter reduces the host processor's data rate burden. Consider the external reference requirement if higher accuracy than the internal reference is needed. Evaluate the power consumption of 272 mW against thermal constraints in the LQFP-48 package. Compare DNL/INL specifications against system linearity requirements.

Digital To Analog Converters Part Context

The AD9772A series belongs to Analog Devices' TxDAC+ family of high-speed DACs. This family is characterized by its ability to generate baseband and IF waveforms with minimal external components due to integrated filtering and clocking. The AD9772AST is a variant within this series, distinguished by its packaging and compliance specifications, designed for broadband signal processing tasks.

Digital To Analog Converters Replacement Considerations

Check Analog Devices datasheets for cross-reference models such as the AD9772ARSTZ or other suffixes that may offer identical electrical performance but different packaging or environmental certifications. Verify pin compatibility before substitution.