**AD976ABRSZ: A 16-Bit, 200 MSPS Dual TxDAC+® Digital-to-Analog Converter**

The **AD976ABRSZ** represents a high-performance member of Analog Devices' renowned TxDAC+® family, engineered to meet the demanding requirements of modern communication, instrumentation, and signal processing systems. As a **dual-channel, 16-bit digital-to-analog converter (DAC)** capable of operating at an impressive **200 MSPS (Mega Samples Per Second)**, this device is optimized for applications requiring high dynamic range, exceptional accuracy, and multi-channel synchronization.

A key strength of the AD976ABRSZ lies in its **dual-channel architecture**, which provides two matched DACs on a single monolithic IC. This integration is crucial for applications such as I/Q modulation in communications transmitters, where precise phase and amplitude matching between channels is paramount to minimize error vector magnitude (EVM) and ensure signal integrity. The on-chip channels are designed to exhibit excellent gain and offset matching, reducing the need for complex external calibration.

The converter's **200 MSPS update rate** ensures that it can generate wide bandwidth signals with high fidelity. This makes it exceptionally suitable for generating intermediate frequency (IF) signals in wireless infrastructure equipment, including 4G LTE and 5G NR base stations. The high sampling rate allows for direct synthesis of higher-frequency carriers, potentially simplifying transmitter design by reducing the number of up-conversion stages required.

The AD976ABRSZ is built on a **segmented current-source architecture**, a hallmark of the TxDAC+® family. This design minimizes glitch energy and provides superior spurious-free dynamic range (SFDR) performance. The **low glitch impulse** is critical for maintaining spectral purity, especially when synthesizing complex waveforms with tight adjacent channel leakage ratio (ACLR) requirements. Furthermore, the device includes a **1.2V internal reference** and control amplifier, allowing for flexible adjustment of the full-scale output current, typically set between 2 mA and 20 mA.

Interfacing is simplified with a **single-port, high-speed CMOS input** that can support word rates up to 200 MSPS. The digital input is designed to be compatible with 3.3V logic levels, facilitating easier connection to modern FPGAs and ASICs. For system control and programmability, the DAC supports both data input clocking and synchronization functions, ensuring precise timing alignment across multiple devices in large arrayed systems.

Packaged in a compact **48-lead LQFP (Low-Profile Quad Flat Pack)**, the AD976ABRSZ is designed for space-constrained environments while still effectively managing thermal performance. Its robust design is intended for operation in extended industrial temperature ranges, ensuring reliability in challenging conditions.

**ICGOODFIND:** The AD976ABRSZ stands out as a high-resolution, high-speed dual DAC that delivers exceptional channel matching and spectral performance. It is an **ideal solution for multi-carrier communication transmitters, advanced instrumentation, and any application demanding synchronized, high-dynamic-range signal generation**.

**Keywords:** High-Speed DAC, Dual Channel, 200 MSPS, 16-Bit Resolution, Spectral Purity.