16-bit isolated measurement for motor-drive current sensing
The AMC1306M25EDWVR is a reinforced isolated sigma-delta modulator from Texas Instruments, designed to digitise analog signals — typically shunt-resistor voltage drops — across a galvanic isolation barrier. Its 16-bit resolution and 78 kSPS sampling rate make it a fit for motor-drive phase-current feedback, solar-inverter DC-link monitoring, and industrial power-supply control loops where the controller side must stay electrically isolated from the high-voltage power stage. The reinforced isolation rating means the modulator meets the creepage and clearance requirements for basic or double insulation per IEC 60747-17 — critical for safety in 400 V or 690 V drive systems where a fault on the shunt side must not propagate to the DSP or FPGA on the low-voltage side.
Supply-rail flexibility and temperature grade
The device operates from a 3 V to 5.5 V supply on the analog side and 2.7 V to 5.5 V on the digital side. This dual-range means the same part works with a 3.3 V DSP core and a 5 V isolated DC-DC rail without a separate level translator — the CMOS serial data interface handles the voltage-domain crossing internally. Rated for -40°C to 125°C ambient, the modulator stays within spec in an enclosure next to a hot motor drive or under a solar inverter lid where internal air temperature climbs well above 85°C. The 8-SOIC wide-body package provides the pin-to-pin creepage distance needed to maintain the reinforced isolation rating across the full temperature range.
Active lifecycle — design in now, no LTB clock
Texas Instruments lists the AMC1306M25EDWVR as Active — no end-of-life notice, no last-time-buy window to track. This is a current-production part that can be specified into new BOMs without a migration plan. The single-channel architecture means one modulator per shunt; for three-phase motor drives, three devices populate the BOM, each in its own 8-SOIC footprint.