ADI AD7403-8BRIZ-RL7

The AD7403 is a high performance, second-order, Σ-Δ modulator that converts an analog input signal into a high speed, single-bit data stream, with on-chip digital isolation based on iCoupler technology. The device operates from a 5 V (VDD1) power supply and accepts a differential input signal of ±250 mV (±320 mV full-scale). The differential input is ideally suited to shunt voltage monitoring in high voltage applications where galvanic isolation is required. The analog input is continuously sampled by a high performance analog modulator, and converted to a ones density digital output stream with a data rate of up to 20 MHz. The original information can be reconstructed with an appropriate digital filter to achieve 88 dB signal to noise ratio (SNR) at 78.1 kSPS. The serial input/output can use a 5 V or a 3V supply (VDD2). The serial interface is digitally isolated. High speed complementary metal oxide semiconductor (CMOS) technology, combined with monolithic transformer technology, means the on-chip isolation provides outstanding performance characteristics, superior to alternatives such as optocoupler devices. The AD7403 device is offered in a 16-lead, wide-body SOIC package and has an operating temperature range of -40°C to +125°C. The AD7403-8 device is offered in an 8-lead, wide-body SOIC package and has an operating temperature range of -40°C to +105°C.

• 5 MHz to 20 MHz external clock input rate
• 16 bits, no missing codes
• Signal-to-noise ratio (SNR): 88 dB typical
• Effective number of bits (ENOB): 14.2 bits typical
• Offset drift vs. temperature AD7403: 1.6 μV/°C typical AD7403-8: 2 μV typical
• On-board digital isolator
• On-board 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 with increased creepage package
• Slew rate limited output for low EMI
• Safety and regulatory approvals UL recognition 5000 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice 5A VDE Certificate of Conformity DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 VIORM = 1250 VPEAK

• Shunt current monitoring
• AC motor controls
• Power and solar inverters
• Wind turbine inverters
• Data acquisition systems
• Analog-to-digital and optoisolator replacements