The document describes the features and characteristics of the AD9251, a 14-bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 1.8V dual analog-to-digital converter.
The AD9251 is a monolithic, dual‑channel, 14‑bit analog‑to‑digital converter that operates from a 1.8 V analog supply and a separate 1.8 V‑3.3 V digital supply. It offers a high‑performance sample‑and‑hold circuit, on‑chip voltage reference, and programmable clock and data alignment.
Key sections include a functional block diagram, detailed specifications (DC, AC, digital, timing, and switching), absolute maximum ratings, thermal characteristics, pin configuration, memory‑map registers, and design‑guidelines for power, grounding, and layout.
| Resolution | 14 bits |
|---|---|
| Maximum Sample Rate | 80 MSPS |
| Input Voltage Range | 2 V p‑p differential |
| Power Consumption (DC) | up to 145 mW |
| Operating Temperature Range | -40 °C to +85 °C |
It operates from a single 1.8 V analog power supply and a separate digital output driver supply that can be 1.8 V to 3.3 V.
The AD9251 can sample at up to 80 MSPS.
The device is supplied in a 64‑lead RoHS‑compliant LFCSP package.
Output data can be formatted as offset binary, gray code, or two's complement.