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ADI AD9779ABSVZ Dual 16-Bit 1 GSPS High Dynamic Range Digital-To-Analog Converter

Shenzhen Mingjiada Electronics Co., Ltd., as a professional supplier of electronic components, has been offering ADI's high-performance digital-to-analogue converter AD9779ABSVZ. This is a dual-channel, 16-bit resolution, 1 GSPS sampling rate high dynamic range DAC, specifically designed for demanding wireless communication and broadband signal processing applications.

【AD9779ABSVZ Product Overview】

The AD9779ABSVZ is a dual-channel, 16-bit, high dynamic range digital-to-analogue converter (DAC) with a 1 GSPS sampling rate, supporting multi-carrier generation up to the Nyquist frequency. The AD9779ABSVZ is optimised for direct conversion transmission applications, including complex digital modulation and gain and offset compensation functionality. The DAC output is optimised for seamless interfacing with analogue quadrature modulators such as the ADL537x FMOD series. A 3-wire interface supports programming and readback of multiple internal parameters. The full-scale output current can be programmed within a range of 10 mA to 30 mA. The AD9779ABSVZ is manufactured using an advanced 0.18 μm CMOS process, operates at 1.8 V and 3.3 V, and has a total power consumption of 1.0 W.

【Main Technical Specifications of AD9779ABSVZ】

Product Category:    Digital-to-Analogue Converter - DAC

Resolution:    16-bit

Sampling Rate:    1 GS/s

Number of Channels:    2 channels

Output Type: Current

Interface Type: Parallel

Analogue Supply Voltage: 1.8 V, 3.3 V

Digital Supply Voltage: 1.8 V, 3.3 V

Minimum Operating Temperature: -40 °C

Maximum Operating Temperature: +85 °C

Mounting Method:    SMD/SMT

Package/Case:    TQFP-100

Differential Nonlinearity (DNL):    ±2.1 LSB

Integral Nonlinearity (INL):    ±6 LSB

Number of Converters:    2 converters

Power Consumption (Pd):    300 mW

【Features of AD9779ABSVZ】

Low power consumption: 1.0 W @ 1 GSPS, 600 mW @ 500 MSPS, under all operating conditions

Single-carrier W-CDMA ACLR = 80 dBc @ 80 MHz intermediate frequency

Analogue output: Adjustable from 8.7 mA to 31.7 mA, load resistance RL = 25 Ω to 50 Ω

New 2×, 4×, and 8× interpolators/coarse demodulators allow the carrier to be placed at any position within the DAC bandwidth

Auxiliary DAC allows control of external VGA and offset control

Refer to the data sheet for more features

【AD9779ABSVZ Product Highlights】

Ultra-low noise and distortion performance: The AD9779ABSVZ achieves a noise spectral density (NSD) of -161 dBm/Hz and intermodulation distortion (IMD) of -92 dBc at a 70 MHz output frequency. At 100MHz output, the AD9779ABSVZ achieves a spur-free dynamic range (SFDR) of 78dBc, with a single-carrier WCDMA ACLR of 79dBc (80MHz intermediate frequency).

Proprietary DAC output switching technology: The AD9779ABSVZ employs a patented output switching architecture, significantly enhancing dynamic performance and enabling high-quality synthesis of wideband signals from baseband to intermediate frequencies.

Flexible current output configuration: The full-scale output current of the AD9779ABSVZ can be programmed within a range of 10mA to 30mA, and the output impedance can be configured between 25Ω and 50Ω, facilitating the implementation of various single-ended or differential circuit topologies.

Integrated digital signal processing functionality: The AD9779ABSVZ incorporates innovative 2×, 4×, and 8× interpolators/coarse modulator, enabling the carrier to be placed at any position within the DAC bandwidth, thereby reducing the burden on external digital signal processing.

High-performance PLL clock multiplier: The AD9779ABSVZ integrates a low-noise phase-locked loop (PLL) clock multiplier, supporting multi-chip synchronisation interfaces to simplify system clock design.

Digital anti-sinc filter: The AD9779ABSVZ incorporates a digital anti-sinc filter to compensate for the sinc roll-off effect in the DAC output, improving high-frequency response.

Programmable gain and offset compensation: The AD9779ABSVZ allows programming and readback of internal parameters via an SPI interface, including gain and offset compensation, to accommodate different application requirements.

【AD9779ABSVZ Application Areas】

Wireless Communication Infrastructure: Fully supports wireless standards such as WCDMA, CDMA2000, TD-SCDMA, WiMAX, GSM, and LTE. Its high dynamic range and low distortion characteristics are particularly suitable for digital up-conversion and signal synthesis in base station transmitters.

Digital intermediate frequency (IF)/low intermediate frequency (LIF) synthesis: The internally integrated digital upconversion functionality simplifies intermediate frequency signal generation and reduces system complexity.

Transmit Diversity Systems: Multi-chip synchronous interfaces support the implementation of multi-antenna transmit diversity architectures.

Broadband Communication Systems: Suitable for broadband applications such as LMDS/MMDS and point-to-point communication.

Test and Measurement Equipment: Serves as a critical DAC component in high-speed arbitrary waveform generators, signal analysers, and other test equipment.

Military Electronic Systems: Meets the requirements of military applications such as radar and electronic warfare for high-speed, high-precision signal synthesis.