AD9851 module sweep frequency generator circuit sweep generator arbitrary waveform generator
It is an improved and upgraded version of AD9851/AD9850. It adopts TFT liquid crystal display. With the buttons, it makes the interface more user-friendly. It supports sine wave square wave output. The square wave can adjust the duty cycle, and it is equipped with a filter circuit and a post-amplification output port. .
The AD9851 is a highly integrated device that uses advanced DDS technology. A high-speed, high-performance digital-to-analog converter and comparator are built into the AD9851 to form a digital programmable frequency synthesizer and clock generator. When using a precision clock source as a reference, the AD9851 can generate a digital, analog output sine wave with a stable frequency and programmable phase. The sine wave can be used directly as a frequency source or internally converted into a square wave suitable for agile clock generator applications. The AD9851's innovative high-speed DDS core provides a 32-bit frequency tuning word; for a 180 MHz reference clock, the output tuning resolution can reach 0.040 Hz. The AD9851 has a unique x6 reference clock multiplier circuit that eliminates the need for a high speed reference oscillator. The 6X PLL multiplier has minimal impact on the spurious-free dynamic range (SFDR) and phase noise characteristics. The device also provides 5-bit digitally controlled phase modulation to enable its output to phase shift in increments of 180", 90", 45", 22.5".11.25" and any combination thereof.
Features
1,180 MHz Clock Rate with Washable 6x Reference Clock Multiplier
2. On-chip high performance 10-bit DACs and high-speed comparators with hysteresis
3. SFDR >43 dB (70 MHz AOUT)
4. 32-bit frequency tuning word
5, simplified control interface: parallel or serial asynchronous load format
6,5-bit phase modulation and offset capability
Comparator jitter: less than 80 ps pp (20 MHz)
8.2.7V to 5.25 V Single Supply Operation
9.ultra-small 28-pin SSOP package
| Low power consumption | 555 mW (180 MHz) |
| power saving function | 4mW (2.7V) |