The document introduces the AD9856, a CMOS 200 MHz Quadrature Digital Upconverter from Analog Devices. This product is a universal low-cost modulator solution for communication applications, with a DC to 80 MHz output bandwidth, integrated 12-bit DAC, and SPI interface.
The AD9856 is a CMOS 200 MHz quadrature digital upconverter that integrates a DDS, a 12‑bit DAC, clock multiplier, and digital filters on a single chip. It is intended for communications applications where cost, size, power dissipation and dynamic performance are critical.
The document includes functional block diagrams, detailed pin function tables, electrical specifications, typical spectral plots, and ordering information for the LQFP‑48 package.
| Output Bandwidth | DC to 80 MHz |
|---|---|
| DAC Resolution | 12 Bits |
| Full‑Scale Output Current | 5 – 20 mA |
| Maximum Junction Temperature | +165 °C |
The AD9856 uses a 12‑bit digital‑to‑analog converter.
The device is rated for a maximum junction temperature of +165 °C.
A minimum supply voltage of +3 V is required for 200 MHz operation at +85 °C.
The AD9856 is offered in a 48‑lead Quad Flatpack (LQFP) package, part number ST‑48.