The AD7400A1 is a second-order Σ-Δ modulator from Analog Devices that offers 16-bit resolution, 10 MHz clock rate, ±2LSB INL, 1.5μV/°C typical offset drift, low power consumption, etc.
The AD7400A is a second‑order sigma‑delta modulator that converts an analog input into a high‑speed 1‑bit data stream. It includes an on‑chip digital isolator, reference, and operates from a 5 V supply with low power consumption (15.5 mA typical). The device is offered in 8‑lead PDIP and 16‑lead SOIC packages.
The datasheet provides detailed specifications, timing parameters, insulation and safety ratings, regulatory approvals, and pin‑out descriptions. It also lists typical applications such as AC motor controls, shunt current monitoring, and data‑acquisition systems.
| Clock Rate | 10 MHz |
|---|---|
| Resolution | 16 bits |
| Input Voltage Range | ±250 mV (full scale ±320 mV) |
| Operating Temperature | ‑40 °C to +125 °C |
| Isolation Voltage | 5000 Vrms (1 min, UL 1577) |
| Power Consumption | 15.5 mA typical at 5.5 V |
The device operates with a 10 MHz master clock output.
It is rated for 5000 Vrms isolation for 1 minute according to UL 1577.
The specified operating temperature range is –40 °C to +125 °C.
The analog input accepts a differential range of ±250 mV (full‑scale ±320 mV).