AD7938/AD7939 is a 8-channel, 1.5 MSPS, 12-bit and 10-bit parallel ADC with a sequencer.
The AD7938 and AD7939 are 8‑channel, 1.5 MSPS, 12‑bit/10‑bit parallel ADCs with a built‑in sequencer. They support single‑ended, fully differential, and pseudo‑differential inputs and feature an on‑chip 2.5 V reference.
The datasheet provides detailed functional block diagrams, electrical specifications, timing parameters, absolute maximum ratings, and recommended PCB layout guidelines for designers integrating these converters into microprocessor‑based systems.
| Throughput rate | 1.5 MSPS |
|---|---|
| Power consumption (3 V supply) | 6 mW max |
| Power consumption (5 V supply) | 13.5 mW max |
| On‑chip reference voltage | 2.5 V |
| Input configuration | Single‑ended, fully differential, pseudo‑differential |
| Resolution (AD7938) | 12 bits |
| Resolution (AD7939) | 10 bits |
The devices can sample up to 1.5 MSPS.
It consumes up to 6 mW at 1.5 MSPS when powered from 3 V.
The ADCs include an accurate 2.5 V on‑chip reference.
The converters support single‑ended, fully differential, and pseudo‑differential inputs, selectable via software.