The AD9953 is a direct digital synthesizer (DDS) featuring a 14-bit DAC operating up to 400 MSPS. The AD9953 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 sinusoidal waveform at up to 200 MHz. The AD9953 includes an integrated 1024 × 32 static RAM to support flexible frequency sweep capability in several modes. The AD9953 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 AD9953 via a serial I/O port. The AD9953 is specified to operate over the extended industrial temperature range of –40°C to +105°C. Applications * Agile VHF/UHF LO frequency synthesis * FM chirp source for radar and scanning systems * Nonlinear-shaped PSK/FSK modulator * Test and measurement equipment * 400 MSPS internal clock speed * Integrated 14-bit DAC * 32-bit tuning word * Phase noise ≤ –120 dBc/Hz at 1 kHz offset (DAC output) * Excellent dynamic performance: >80 dB SFDR at 160 MHz (±100 kHz offset) AOUT * Serial input/output (I/O) control * 1.8 V power supply * Software and hardware controlled power-down * 48-lead TQFP/EP package * PLL REFCLK multiplier (4× to 20×) * Internal oscillator, can be driven by a single crystal * Phase modulation capability * Multichip synchronization https://elecena.pl/product/17775669/400-msps-14-bit-1-8-v-cmos-direct-digital-synthesizer 2021-04-18 https://elecena.pl/product/17775669/400-msps-14-bit-1-8-v-cmos-direct-digital-synthesizer 2025-01-19