The AD7321 is a 2-channel, 500 kSPS, software-selectable, true bipolar input, 12-bit plus sign ADC from Analog Devices.
The AD7321 is a 2‑channel, 12‑bit plus sign successive‑approximation ADC built on Analog Devices' iCMOS process. It accepts true bipolar analog inputs and offers four software‑selectable input ranges (+10 V, +5 V, +2.5 V, and 0‑10 V unipolar). The device features a high‑speed serial interface capable of up to 500 kSPS throughput and operates with low power consumption (18 mW in normal mode).
The ADC is supplied in a 14‑lead TSSOP package and includes an internal 2.5 V reference (or can use an external reference). Detailed specifications cover dynamic performance, conversion timing, absolute maximum ratings, and recommended layout and grounding practices for optimal operation.
| Throughput rate | 500 kSPS |
|---|---|
| Power consumption (Normal Mode) | 18 mW |
| Full‑power bandwidth | 22 MHz |
| Input voltage ranges | +10 V, +5 V, +2.5 V, 0‑10 V |
| Resolution | 12‑bit plus sign (13‑bit total) |
| Package | 14‑lead TSSOP |
The AD7321 can sample at up to 500 kSPS.
Four ranges are selectable: +10 V, +5 V, +2.5 V, and 0‑10 V unipolar.
It consumes about 18 mW in normal mode.
The device is supplied in a 14‑lead TSSOP package.