ADI AD9858BSV

The AD9858 is a direct digital synthesizer (DDS) featuring a 10-bit digital-to-analog converter (DAC) operating up to 1 GSPS. The AD9858 uses advanced DDS technology coupled with an internal high speed, high performance DAC to form a digitally programmable, complete high frequency synthesizer capable of generating a frequency-agile analog output sine wave at up to 400 MHz. The AD9858 is designed to provide fast frequency hopping and fine tuning resolution (32-bit frequency tuning word). The frequency tuning and control words are loaded into the AD9858 via parallel (8-bit) or serial loading formats. The AD9858 contains an integrated charge pump (CP) and phase frequency detector (PFD) for synthesis applications requiring the combination of a high speed DDS along with phase-locked loop (PLL) functions. An analog mixer is also provided on chip for applications requiring the combination of a DDS, PLL, and mixer, such as frequency translation loops and tuners. The AD9858 also features a divide-by-2 on the clock input, allowing the external reference clock to be as high as 2 GHz.

The AD9858 is specified to operate over the extended industrial temperature range of -40°C to +85°C.

• 1 GSPS internal clock speed
• Up to 2 GHz input clock (selectable divide-by-2)
• Integrated 10-bit DAC
• Excellent phase noise and SFDR
• 32-bit programmable frequency register
• Simplified 8-bit parallel and SPI serial control interface
• Automatic frequency sweeping capability
• 4 frequency profiles
• 3.3 V power supply
• Power dissipation: 2 W typical
• Integrated programmable charge pump and phase frequency detector with fast lock circuit
• Isolated charge pump supply up to 5 V
• Integrated 2 GHz mixer

• VHF/UHF LO synthesis
• Tuners
• Instrumentation
• Agile clock synthesis
• Cellular base station hopping synthesizers
• Radars
• SONET/SDH clock synthesis