The AD9281 is a complete dual channel, 8-bit CMOS ADC with features including dual matching, low power dissipation, single supply, low differential nonlinearity error, on-chip analog input buffers, on-chip reference, high signal-to-noise ratio, no missing codes, etc.
The AD9281 integrates two 8‑bit, 28 MSPS ADCs, on‑chip analog input buffers, a band‑gap reference and multiplexed digital output buffers. It operates from a single supply of 2.7 V to 5.5 V and consumes about 225 mW at 3 V.
The device supports both single‑ended and differential inputs, provides a selectable 1 V or 2 V reference, and includes ESD protection. Its pinout allows a single 8‑bit digital output bus, reducing board space and pin count.
| Resolution | 8 Bits |
|---|---|
| Conversion Rate | 28 MHz (32 MHz at +25 °C) |
| Power Consumption | 225 mW (typical at 3 V) |
| Supply Voltage | 2.7 V to 5.5 V (AVDD and DVDD) |
| Differential Nonlinearity | ±0.1 LSB |
| Input Voltage Range | –0.5 V to +1.5 V (single‑ended) |
The AD9281 typically consumes 225 mW when powered at 3 V.
The ADC can sample at up to 28 MSPS (32 MSPS at +25 °C).
Both analog (AVDD) and digital (DVDD) supplies can be between 2.7 V and 5.5 V.
Yes, it includes an on‑chip band‑gap reference selectable for 1 V or 2 V output.