New original AD9755 AD9755AST 14-bit 300 MSPS High Speed ​​DAC IC

AD9755AST is a high-performance, ultra-high-speed digital-to-analog converter (DAC) launched by ADI, designed for application scenarios that require high-precision and high-dynamic range signal conversion. The following is a detailed introduction to its core features and technical parameters:

I. Core functions and technical advantages

• 14-bit resolution and 300 MSPS conversion rate:
  ***AD9755AST supports an update rate of up to 300 MSPS (million samples per second), can process high-speed data streams, and is suitable for high-frequency signal generation.
  ***14-bit resolution ensures the fineness of signal conversion and meets high-precision requirements.
• Dual multiplexed port architecture: It adopts dual 14-bit data input ports, supports single-port or dual-port input modes, and the data is merged into a 300 MHz parallel stream through a 2-1 multiplexer to improve data throughput.
• Excellent dynamic performance
  ***Spurious-free dynamic range (SFDR): At 25 MHz output, SFDR reaches 71 dB (to Nyquist frequency), effectively suppressing spurious signals.
  ***Low intermodulation distortion (IMD): ensure signal purity, suitable for complex modulation scenarios (such as QAM, OFDM).
• Integrated design
  ***Built-in high-quality 14-bit TxDAC+ core, 1.2V on-chip reference voltage source and digital interface circuit, reducing external component requirements and simplifying circuit design.
  ***Supports differential or single-ended clock input, built-in clock multiplication PLL, enhanced clock flexibility.
• Low power consumption and industrial-grade reliability
  ***3.3V single power supply, power consumption is only 155 mW, suitable for power-sensitive applications.
  ***Operating temperature range -40°C to +85°C, adapt to harsh industrial environments.

2. Key application scenarios

• Communication system
  ***Wireless base station signal source: Generate high-frequency carrier signals, support broadband wireless access technologies such as LMDS, LMCS, MMDS, etc.
  ***Digital signal synthesis: used for signal generation of modulation methods such as QAM and OFDM to improve communication system performance.
• Test and Measurement
  ***High-frequency signal generator: Generates arbitrary waveforms (such as sine waves, pseudo-random noise) for calibration of equipment such as spectrum analyzers and oscilloscopes.
  ***Precision testing: Provides low-distortion signals in high-frequency environments to ensure test accuracy.
• Intelligent instruments and industrial control
  ***High-speed data acquisition system: Converts analog signals into digital signals for use in vibration analysis, acoustic detection and other fields.
  ***Industrial automation: Controls high-speed actuators such as motor drives and robot joint control.

III. Technical specifications and packaging
***Package: 48-pin LQFP (7×7 mm), miniaturized design for easy integration.
***Power supply: 3.0V to 3.6V single power supply.
***Output type: Differential current output (IOUTA/IOUTB), supports single-ended or differential applications.
***Settling time: Input setup time 2.0 ns, output setup time 11.0 ns, to ensure the real-time nature of high-speed signal conversion.

IV. Competitive Advantages
***Balance of high performance and low power consumption: while providing high conversion rate and excellent dynamic performance, it maintains low power consumption and extends the battery life of the device.
***Flexible data interface: The dual multiplexed port design supports multiple data input modes and improves the flexibility of system design.
***High integration: Built-in reference voltage source and PLL reduce the number of external components and reduce system cost.
***Industrial reliability: Wide temperature range and stable performance make it suitable for various industrial environments.

V. Summary
AD9755AST has become the core DAC solution in the field of high-speed communication, precision testing and intelligent instruments with its 14-bit resolution, 300 MSPS conversion rate, excellent dynamic performance and low power design. Its flexible dual multiplexed port architecture and high integration design can meet the diverse needs from base stations to high-precision instruments, and is an ideal choice for high-performance signal conversion applications.