ADI AD7403BRIZ-RL7

The AD74031 is a high-performance second-order Σ-Δ modulator with on-chip digital isolation using iCoupler technology, converting analog input signals into a high-speed single-bit data stream. The device operates from a 5V (VDD1) supply and accepts ±250mV differential input signals (full-scale ±320mV). This differential input is ideally suited for monitoring shunt voltages in high-voltage applications requiring current isolation. The analog input is continuously sampled by a high-performance analog modulator and converted to a density-1 digital output stream at data rates up to 20MHz. The original information can be reconstructed using an appropriate digital filter to achieve 88 dB SNR at 78.1 kSPS. The serial I/O can be powered from either a 5V or 3V supply (VDD2). The serial interface features digital isolation. By combining high-speed CMOS technology with monolithic transformer technology, the on-chip isolation delivers superior operating characteristics compared to alternative components such as conventional optocouplers. The AD7403 is available in a 16-lead wide-body SOIC package with an operating temperature range of -40°C to +125°C. The AD7403-8 is available in an 8-lead wide-body SOIC package with an operating temperature range of -40°C to +105°C.

• External clock input rate: 5 MHz to 20 MHz
• 16-bit no missing codes
• SNR: 88 dB (typical)
• ENOB: 14.2 bits (typical)
• Offset temperature drift AD7403: 1.6 μV/°C (typical); AD7403-8: 2 μV/°C (typical)
• On-chip digital isolator
• On-chip voltage reference
• Full-scale analog input range: ±320 mV
• Operating range AD7403: -40°C to +125°C; AD7403-8: -40°C to +105°C
• High common-mode transient immunity: >25 kV/μs
• Wide-body SOIC package for increased creepage distance
• Slew-rate limited output for low EMI
• Safety and regulatory approvals: UL recognition 1-minute 5000 V rms per UL 1577; CSA Component Acceptance Notice 5A; VDE certification per DIN V VDE V 0884-10 (VDE V 0884-10):2006-12, VIORM = 1250 VPEAK

• Shunt current monitoring
• AC motor control
• Power and solar inverters
• Wind turbine inverters
• Data acquisition systems
• Replacement for analog and optoisolators