This datasheet details the specifications and features of the AD9854, a CMOS 300 MSPS quadrature complete digital synthesizer using advanced DDS technology.
The AD9854 is a highly integrated device that uses advanced Direct Digital Synthesis (DDS) technology coupled with two internal high-speed, high-performance quadrature DACs. It generates stable, frequency-phase, and amplitude-programmable sine and cosine outputs suitable for agile local oscillators in communications, radar, and test equipment applications.
The device provides 48-bit frequency resolution and supports simultaneous quadrature output signals up to 150 MHz. Key features include an internal programmable reference clock multiplier (4x to 20x), support for FSK, BPSK, PSK, and chirp operations, and a single-pin interface for conventional FSK and BPSK data.
| Internal System Clock Frequency Range (Multiplier Enabled) | 20 to 300 MHz |
|---|---|
| External Reference Clock Frequency Range (Multiplier Disabled) | DC to 200 MHz |
| DAC Resolution | 12 Bits |
| Full-Scale Output Current (I and Q) | 5 to 20 mA |
| Wideband SFDR (1 MHz to 20 MHz) | 58 dBc |
| Narrow-Band SFDR (10 MHz, ±1 MHz) | 83 dBc |
| Supply Voltage | 3.3 V single supply |
| Operating Temperature Range (Industrial) | -40°C to +85°C |
The internal system clock frequency can reach up to 300 MHz when the REFCLK multiplier is enabled.
Yes, direct 300 MHz clocking is accommodated with either single-ended or differential inputs.
The device supports FSK, BPSK, PSK, chirp, and AM operation.