The AD9739 is a 14-bit, 2.5 GSPS high performance RF digital-to-analog converter (DAC) capable of synthesizing wideband signals from DC to 3 GHz. It features direct RF synthesis, a dual-port LVDS data interface, source synchronous DDR clocking, programmable output current and low power. The AD9739 is ideal for a wide range of applications including broadband communications systems, military jammers, instrumentation, automatic test equipment, radar and avionics.
The AD9739 is a 14‑bit, 2.5 GSPS RF digital‑to‑analog converter capable of direct RF synthesis up to 3.0 GHz. It offers programmable output current, dual‑port LVDS interface, and multichip synchronization for high‑performance broadband communications, radar, and test equipment.
This document provides a complete description of the device, including functional block diagrams, pin configurations, detailed DC, LVDS, serial‑port, and AC specifications, absolute maximum ratings, thermal data, and recommended start‑up sequences. Ordering information and package dimensions are also included.
| Resolution | 14 Bits |
|---|---|
| Integral Nonlinearity (INL) | 41.3 LSB |
| Differential Nonlinearity (DNL) | +0.8 LSB |
| Gain Error (with Internal Reference) | 5.5 % |
| Full‑Scale Output Current | 8.66 – 31.66 mA |
| Output Compliance Range | -1.0 V to +1.0 V |
| DAC Clock Rate | 0.8 – 2.5 GHz |
| Power Dissipation (2.5 GSPS) | 1.16 W |
| Maximum LVDS Clock Rate | 625 MHz |
The AD9739 provides a 14‑bit resolution.
The output current can be programmed from 8.66 mA up to 31.66 mA.
At 2.5 GSPS the device dissipates approximately 1.16 W.
The analog supplies are VDDA = 3.3 V and VDDC = 1.8 V.