AD7008 is a CMOS DDS modulator from Analog Devices, which features single +5 V supply, 32-bit phase accumulator, on-chip COSINE and SINE look-up tables, on-chip 10-bit DAC, frequency, phase and amplitude modulation, parallel and serial loading, software and hardware power down options, 20 MHz and 50 MHz speed grades.
The AD7008 is a fully integrated CMOS direct‑digital‑synthesis (DDS) modulator that combines a 32‑bit phase accumulator, sine/cosine look‑up tables, a 10‑bit DAC and on‑chip modulation capabilities for phase, frequency, AM and QAM. It operates from a single +5 V supply and supports clock rates of 20 MHz or 50 MHz depending on the speed grade.
The document provides a functional block diagram, detailed electrical specifications, timing characteristics, absolute‑maximum ratings, pin configuration and description, register maps, and information on the AD7008/PCB evaluation board, including typical electrical characteristics and usage notes.
| Resolution | 10 Bits |
|---|---|
| Update Rate (fax) | 20 MSPS – 50 MSPS |
| IOUT Pull Scale | 20 mA |
| Output Compliance | 1 Volt |
| Reference Temperature Coefficient | 300 ppm/°C |
| Digital Supply Voltage (Vpp) | 5 V ±5 % |
The AD7008 uses a single +5 V supply with a tolerance of ±5 % for both analog (Va) and digital (Vpp) sections.
The device supports clock rates up to 20 MHz for the standard grade and 50 MHz for the high‑speed grade.
The integrated DAC has a 10‑bit resolution.