The AD7401 is a second-order, high-precision sigma-delta modulator with 16-bit accuracy, on-chip digital isolation, and low power consumption. The device utilizes Analog Devices' proprietary Σ-Δ modulator technology to convert an analog input signal into a high-precision, high-speed, single-bit digital data stream. The AD7401 is suitable for AC motor control, data acquisition systems, and A/D isolation replacements.
The AD7401 from Analog Devices is a second‑order sigma‑delta modulator that converts an analog input into a high‑speed 1‑bit data stream. It features an on‑chip digital isolator, reference, and operates from a 5 V supply with a differential input range of ±200 mV.
The device is supplied in a 16‑lead SOIC package, supports a maximum external clock rate of 20 MHz, and meets safety standards such as UL 1577 with a 5000 Vrms isolation voltage. It operates over a temperature range of –40 °C to +105 °C and includes detailed pin configurations and timing specifications.
| Maximum external clock rate | 20 MHz |
|---|---|
| Resolution | 16 bits |
| Input voltage range | +200 mV min / +320 mV max |
| Operating temperature range | –40 °C to +105 °C |
| Isolation voltage (momentary withstand) | 5000 Vrms for 1 minute |
The AD7401 supports a maximum external clock rate of 20 MHz.
It meets a 5000 Vrms isolation voltage for a 1‑minute duration.
The device operates from –40 °C to +105 °C.
It provides 16‑bit resolution.