The AD7400 is an isolated Sigma-Delta modulator with features such as a 10 MHz clock rate, 16 bits, ±2 LSB INL typical, and a maximum offset drift of 3.5 μV/°C.
The AD7400 is a second‑order sigma‑delta modulator with on‑chip digital isolation. It operates from a 4.5 V to 5.25 V supply, offers a 10 MHz clock rate, and delivers a 16‑bit resolution with no missing codes. The device includes an on‑board reference, low‑power operation (18 mA max), and is supplied in a 16‑lead SOIC package.
The document lists detailed electrical specifications, timing parameters, insulation and safety ratings (5000 Vrms for 1 minute per UL 1577), regulatory approvals, and pin descriptions. It also includes application notes for AC motor controls, data‑acquisition systems, and A/D plus opto‑isolator replacements.
| Clock rate | 10 MHz |
|---|---|
| Resolution | 16 bits |
| Operating temperature range | -40 °C to +105 °C |
| Supply voltage (VON) | 4.5 V to 5.25 V |
| Isolation voltage (UL 1577) | 5000 Vrms for 1 minute |
| Maximum supply current | 13 mA |
The AD7400 operates with a typical master clock output frequency of 10 MHz.
The device is rated for 5000 Vrms isolation for 1 minute according to UL 1577.
It is specified to operate from –40 °C up to +105 °C.
The converter provides a 16‑bit resolution with no missing codes.