AMC1203 (Isolated Delta-Sigma

The AMC1203 is a 1-bit, 10MHz, isolated delta-sigma () modulator with an output buffer separated from the input interface circuitry by a silicon dioxide (SiO₂) isolation barrier. This barrier provides galvanic isolation of up to 4000V_PEAK. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry.

The AMC1203 modulator operates from a +5V supply with a dynamic range of 95dB. The differential inputs are ideal for direct connection to shunt resistors or other low-level signal sources. With the appropriate digital filter and modulator rate, the device can be used to achieve 16-bit analog-to-digital (A/D) conversion with no missing codes.