AD7322 is a 12-bit plus sign SAR ADC with true bipolar input ranges, software-selectable input ranges ±10 V, ±5 V, ±2.5 V, 0 V to +10 V, 1 MSPS throughput rate, two analog input channels with channel sequencer, single-ended, true differential and pseudo differential analog input capability, high analog input impedance, low power: 21 mW, full power signal bandwidth: 22 MHz, internal 2.5 V reference, high speed serial interface, power-down modes, 14-lead TSSOP package, iCMOS process technology.
The AD7322 from Analog Devices is a dual‑channel, 12‑bit plus‑sign successive‑approximation ADC designed on iCMOS technology. It supports true bipolar input signals and offers four software‑selectable input ranges (+10 V, +5 V, +2.5 V, and 0 V to +10 V). The device features a high‑speed serial interface compatible with SPI, QSPI, DSP, and Microwire protocols.
Key specifications include a 1 MSPS maximum conversion rate, 22 MHz full‑power bandwidth, low power consumption (31 mW in normal mode), and a 14‑lead TSSOP package. Detailed pin functions, timing diagrams, and absolute maximum ratings are provided for system integration.
| Throughput Rate | 1 MSPS |
|---|---|
| Full Power Bandwidth | 22 MHz |
| Power Dissipation (Normal Mode) | 31 mW |
| Input Voltage Ranges | +10 V, +5 V, +2.5 V, 0 V to +10 V |
| Resolution | 13 bits (12‑bit plus sign) |
The AD7322 can operate at up to 1 MSPS conversion throughput.
Four ranges are selectable: +10 V, +5 V, +2.5 V, and 0 V to +10 V.
In normal mode the device dissipates about 31 mW.
The ADC provides a full‑power bandwidth of 22 MHz.