The AD7993/AD7994 are 4-channel, 10- and 12-bit ADCs with I2C-compatible interface in 16-lead TSSOP package. The products feature fast conversion time, low power consumption, automatic cycle interval mode, pin-selectable addressing, etc.
The AD7993 and AD7994 are low‑power, successive‑approximation 4‑channel ADCs with selectable 10‑bit (AD7993) or 12‑bit (AD7994) resolution. They operate from a single 2.7 V to 5.5 V supply and provide a fast 2 µs typical conversion time. An I2C‑compatible serial interface supports standard, fast, and high‑speed modes, with pin‑selectable addressing for up to five devices on the same bus.
The datasheet includes detailed electrical specifications, absolute maximum ratings, pin‑out diagrams, register maps, timing diagrams, and mode‑of‑operation descriptions. It also provides typical performance curves, connection examples, and ordering information for designers integrating the parts into measurement or control systems.
| Resolution (AD7993) | 10 bits |
|---|---|
| Resolution (AD7994) | 12 bits |
| Conversion time | 2 µs typ |
| Supply voltage range | 2.7 V to 5.5 V |
| Throughput rate (high‑speed mode) | 188 kSPS |
| Operating temperature range | −40 °C to +125 °C |
| Shutdown current | 1 µA max |
The ADC converts in about 2 µs typical conversion time.
Standard (100 kHz), Fast (400 kHz), and High‑speed modes (up to 3.4 MHz for the AD7993‑1/AD7994‑1 versions).
The part offers four single‑ended analog input channels.
The device draws a maximum of 1 µA in shutdown mode.