Analog Devices Inc. AD9914 直接数字合成器
Analog Devices AD9914 3.5GSPS 直接数字合成器 (DDS) 采用先进的DDS 技术，还具有高速、高性能 12 位内部数模转换器 (DAC)。 这些可编程的完整高频合成器能够产生最高 1.4GHz 的频率捷变模拟输出正弦波。 AD9914 DDS 还可实现快速跳频和精密调谐分辨率。 采用可编程模数模式，AD9914 的微调可达到 64 位分辨率。 AD9914 还实现了快速相位与幅度跳频功能。 频率调谐和控制字通过串行或并行 I/O 端口载入 AD9914。 AD9914 DDS 支持在用户定义线性扫描模式下工作，可产生频率、相位或幅度的高度线性扫描波形。 AD9914 的高速 32 位并行数据输入端口，可支持极性调制方案的高数据率以及相位、频率和幅度调谐字的快速编程。
The AD9914 DDS allows fast-frequency hopping and fine-tuning resolution. Using the programmable modulus mode, AD9914’s fine-tuning is capable of 64-bit resolution. AD9914 also offers fast-phase and amplitude hopping capability. A serial or parallel input/output port loads the control words and frequency tuning on the AD9914.
AD9914 DDS supports a user-defined linear sweep mode of operation for generating linear swept waveforms of frequency, phase, or amplitude. AD9914’s high-speed, 32-bit parallel data input port allows high data rates for polar modulation schemes and fast reprogramming of the frequency, phase, and amplitude tuning words.
特性
- 3.5GSPS internal clock speed
- Integrated 12-bit DAC
- Frequency tuning resolution to 190pHz
- 16-bit phase tuning resolution
- 12-bit amplitude scaling
- Programmable modulus
- Automatic linear and nonlinear frequency sweeping capability
- 32-bit parallel datapath interface
- 8 frequency/phase offset profiles
- Phase noise: −128dBc/Hz (1kHz offset at 1396MHz)
- Wideband SFDR <−50dBc
- Serial or parallel input/output control
- 1.8V/3.3V power supplies
- Software and hardware controlled power-down
- 88-lead LFCSP package
- PLL REF CLK multiplier
- Phase modulation capability
- Amplitude modulation capability
应用
- Agile LO frequency synthesis
- Programmable clock generator
- FM chirp source for radar and scanning systems
- Test and measurement equipment
- Acousto-optic device drivers
- Polar modulator
- Fast frequency hopping
Functional Block Diagram
AD9914/PCBZ Evaluation Board
Analog Devices AD9914/PCBZ Evaluation Board helps designers evaluate the features of the AD9914 3.5GSPS Direct Digital Synthesizers with 12-bit DAC.
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