AD9868 is a low cost 3.3 V CMOS MxFE from Analog Devices for broadband modems. It features a 10-bit DAC converter, 2x/4x interpolation filter, 200 MSPS DAC update rate, integrated 17 dBm line driver with 19.5 dB gain control, 10-bit, 80 MSPS, ADC converter, -12 dB to +48 dB low noise RxPGA (<3 nV/√Hz), third-order programmable low-pass filter, flexible digital data path interface, half- and full-duplex operation, pin compatible with the AD9865, various power-down/reduction modes, internal clock multiplier (PLL) and two auxiliary programmable clock outputs.
The AD9868 is a broadband‑modem mixed‑signal front‑end (MxFE) IC that integrates a 10‑bit DAC, 10‑bit ADC, programmable gain amplifiers, and a PLL‑based clock multiplier. It supports half‑ and full‑duplex operation with flexible digital interfaces, making it suitable for high‑speed transceiver designs up to 80 MSPS.
The device is offered in a 64‑lead LFCSP_VQ package, operates from a 3.3 V supply, and includes power‑saving modes, internal reference, and a 17 dBm line driver. Detailed electrical specifications, timing diagrams, and pin configurations are provided for designers.
| TxDAC Resolution | 10 Bits |
|---|---|
| TxDAC Update Rate | 200 MSPS |
| AVDD Supply Voltage (typical) | 3.3 V |
| Total Supply Current (typical) | 406‑475 mA |
| RxPGA Gain Range | -12 dB to +48 dB |
| Package | 64‑Lead LFCSP_VQ (CP‑64‑3) |
The AD9868 is available in a 64‑lead LFCSP_VQ package (CP‑64‑3).
AVDD operates at 3.135 V to 3.465 V, with a typical value of 3.3 V.
The RxPGA provides a programmable gain from –12 dB to +48 dB.