Precision delta-sigma modulator is highly resistant to magnetic interference

Texas Instruments (TI) has introduced the AMC1305, a precision, delta-sigma (?S) modulator with the output separated from the input circuitry by a capacitive double isolation barrier that is highly resistant to magnetic interference. The barrier provides certified reinforced isolation of up to 7000 VPEAK according to the DIN V VDE V 0884-10, UL1577, and CSA standards. Used in conjunction with isolated power supplies, the device prevents noise currents on a high common-mode voltage line from entering the local system ground and interfering with or damaging low-voltage circuitry. The device is available in a wide-body SOIC-16 (DW) package with a -40C to 125C temperature range. The AMC1305 is optimized for direct connection to shunt resistors or other low voltage level signal sources while supporting exceptional DC and AC performance. Shunt resistors are typically used to sense currents in motor drives, green energy generation systems, or other industrial applications. By using an appropriate digital filter (that is, as integrated on the TMS320F2837x) to decimate the bit stream, the device can achieve 16 bits of resolution with a dynamic range of 85dB (13.8 ENOB) at a data rate of 78kSPS, says the company.