The AD9869 is a low cost 3.3 V CMOS MxFE for broadband modems.
The AD9869 is a low‑cost 3.3 V CMOS mixed‑signal front‑end (MxFE) IC for broadband modem applications. It integrates a 12‑bit DAC with up to 200 MSPS update rate, a 12‑bit ADC up to 80 MSPS, programmable gain amplifiers, and an internal PLL clock multiplier, supporting both half‑ and full‑duplex operation.
The document provides detailed electrical specifications, power‑supply requirements, digital interface timing, and pin‑out descriptions. It also includes functional block diagrams, ordering information, and mechanical dimensions for the 64‑lead LFCSP package.
| DAC Resolution | 12 bits |
|---|---|
| DAC Update Rate | 200 MSPS |
| ADC Resolution | 12 bits |
| ADC Conversion Rate | 20–80 MSPS |
| Supply Voltage (AVDD) | 3.3 V ±5 % |
| Total Supply Current | 406–475 mA |
| Tx Mode Power Consumption (Half‑Duplex) | 112–130 mA |
| Rx Mode Power Consumption (Half‑Duplex) | 225–253 mA |
| Tx DAC Gain Range | 0 dB to 75 dB |
The DAC provides a 12‑bit resolution.
The DAC can update at up to 200 MSPS.
The ADC can convert at rates from 20 MSPS up to 80 MSPS.
The device operates from a 3.3 V supply with a ±5 % tolerance.