This document describes the features and characteristics of the AD7327 model from Analog Devices. The product is an 8-channel 12-bit plus sign ADC with software-selectable true bipolar input ranges. It offers high resolution and sampling rate, and allows for selection of different input ranges. Additionally, it features low power consumption, high-speed serial interface, and multiple power-down modes.
The AD7327 is an 8‑channel, 12‑bit plus‑sign successive‑approximation ADC designed on an iCMOS process. It offers true bipolar input capability with four software‑selectable voltage ranges (+10 V, +5 V, +2.5 V, and 0‑10 V) and a high‑speed serial interface that can operate at up to 500 kSPS.
The device operates from a 12‑16.5 V supply, consumes only 17 mW in normal mode, and provides a full‑power bandwidth of 22 MHz. It is supplied in a 20‑lead TSSOP package and is rated for temperatures from –40 °C to +85 °C. Detailed specifications, timing diagrams, absolute maximum ratings, and ordering information are included.
| Throughput rate | 500 kSPS |
|---|---|
| Resolution | 12‑bit plus sign SAR |
| Input voltage ranges | +10 V, +5 V, +2.5 V, 0‑10 V |
| Power dissipation (normal mode) | 17 mW |
| Full‑power bandwidth | 22 MHz |
| Package | 20‑lead TSSOP |
| Operating temperature range | -40 °C to +85 °C |
The AD7327 can operate at up to 500 kSPS throughput.
Four software‑selectable ranges are available: +10 V, +5 V, +2.5 V, and 0‑10 V unipolar.
In normal mode the device dissipates about 17 mW.
The ADC is supplied in a 20‑lead TSSOP (RU‑20) package.