TI AMC1304L25DWR

AMC1304 is a high-precision Δ-Σ (ΔΣ) modulator that isolates the output from the input circuitry through a capacitive dual-isolation barrier with high magnetic field immunity. Per DIN V VDE V 0884-10, UL1577, and CSA standards, the isolation barrier is certified to provide reinforced isolation up to 7000VPEAK. When used with an isolated power supply, the device prevents noise currents on common-mode high-voltage lines from entering the local system ground and interfering with or damaging low-voltage circuits. The AMC1304 input is optimized for direct connection to shunt resistors or other low-voltage signal sources. With a unique ±50mV low input voltage range, the device significantly reduces power dissipation through the shunt while delivering excellent AC and DC performance. By using an appropriate digital filter (i.e., integrated in the TMS320F2807x or TMS320F2837x series) to decimate the bitstream, the device achieves 16-bit resolution with 81dB (13.2 ENOB) dynamic range at a 78kSPS data rate. On the high side, the modulator is powered by an integrated LDO regulator that supports unregulated input voltages (LDOIN) between 4V and 18V. The isolated digital interface is powered by a 3.3V or 5V supply (DVDD). The AMC1304 is available in a wide-body SOIC-16 (DW) package and operates over a temperature range of −40°C to +125°C.

• Pin-compatible family optimized for shunt resistor-based current measurement
• Input voltage range: ±50mV or ±250mV
• CMOS or LVDS digital interface options
• Excellent DC performance for system-level high-accuracy sensing
• Offset error: ±50μV or ±100μV (maximum)
• Offset drift: 1.3μV/°C (maximum)
• Gain error: ±0.2% or ±0.3% (maximum)
• Gain drift: ±40ppm/°C (maximum)
• 7000VPK reinforced isolation, compliant with DIN V VDE V0884-10 (VDE V 0884-10): 2006-12
• UL 1577 compliant, 5000V RMS isolation for up to 1 minute
• CAN/CSA No. 5A component recognition, IEC60950-1 and IEC 60065 end equipment standards
• Transient immunity: 15kV/μs (minimum)
• High immunity to electromagnetic fields
• External 5MHz to 20MHz clock input for easier system-level synchronization
• 18V on-chip LDO regulator for operation over extended industrial temperature range

• Shunt resistor-based current sensing for:
• Industrial motor drives
• Photovoltaic inverters
• Uninterruptible power supplies
• Isolated voltage measurement