AD7933/AD7934 are 4-channel 12-bit and 10-bit parallel ADCs with a conversion rate of 1.5 MSPS. They feature low power consumption, programmable analog input channels, accurate internal reference voltage, and high-speed parallel interface.
The AD7933/AD7934 are parallel SAR analog‑to‑digital converters that operate from a single 2.7 V to 5.25 V supply. They provide four analog input channels with a programmable sequencer and support single‑ended, fully differential, or pseudo‑differential inputs. The devices feature an on‑chip 2.5 V reference that can also be over‑driven for an external reference.
Key features include a 1.5 MSPS maximum throughput rate, low power operation (6 mW at 3 V, 13.5 mW at 5 V), 70 dB SINAD in differential mode, and a flexible parallel interface with word/byte modes. The datasheet provides detailed specifications, timing diagrams, absolute maximum ratings, and application hints for microprocessor interfacing.
| Throughput rate | 1.5 MSPS |
|---|---|
| Power consumption (3 V supply) | 6 mW max |
| Power consumption (5 V supply) | 13.5 mW max |
| Number of analog input channels | 4 |
| On‑chip reference accuracy | +0.2 % max @ 25 °C |
| SINAD (differential mode) | 70 dB min |
| Resolution (AD7934) | 12 bits |
| Input configuration options | Single‑ended, pseudo‑differential, fully differential |
The AD7934 can sample up to 1.5 MSPS.
At a 5 V supply the device dissipates up to 13.5 mW in normal operation.
It supports single‑ended, fully differential, and pseudo‑differential analog inputs, selectable by software.
The device includes an accurate on‑chip 2.5 V reference.