AC input isolated modulator with integrated resistive divider and external clock

The AMC0386 is a precision,

galvanically isolated delta-sigma (ΔΣ) modulator with a high-voltage, high impedance input, and

external clock. The input is designed to connect directly to a high-voltage signal

source.

The isolation barrier separates parts of the

system that operate on different common-mode voltage levels. The isolation barrier is highly

resistant to magnetic interference and is certified to provide reinforced isolation of up to

5kVRMS (60s).

The output bitstream of the AMC0386 is synchronized to

the internally generated 10MHz clock. Combined with a

sinc3, OSR 256 filter, the device achieves 14.8 effective

bits of resolution or 89dB of dynamic range, at a 39kSPS sample rate.

With the integrated resistive divider,

excellent DC accuracy, low temperature drift and high stability, the AMC0386 achieves better than 1% accuracy over lifetime and temperature without system-level

calibration.

The AMC0386 is available in

a 15-pin, 0.65mm pitch SSOP package and is fully specified over the temperature range from

–40°C to +125°C.