The document is about Analog Devices' AD9853 programmable digital QPSK/16-QAM modulator, describing its functions and features, including digital-to-analog converter, filters, encoders, etc. The modulator is a universal low-cost solution for HFC network return-channel TX function.
The AD9853 integrates a high‑speed DDS, DAC, digital filters and Reed‑Solomon FEC into a single CMOS chip. It is intended for HFC, WLAN and MMDS network applications where cost, size and power consumption are critical.
The device operates from a single +3.3 V to +5 V supply, supports a wide range of reference‑clock frequencies, and is offered in a 44‑lead MQFP package suitable for -40 °C to +85 °C industrial environments.
| Resolution | 10 Bits |
|---|---|
| SFDR (Single Tone) at 42 MHz | >50 dB |
| Package | 44‑Lead Metric Quad Flatpack (S‑44A) |
It operates from a single +3.3 V to +5 V supply.
FSK, QPSK, DQPSK, 16‑QAM and D16‑QAM can be selected via the control bus.
It is supplied in a 44‑lead metric quad flat‑pack (S‑44A).