Catalog
16-Bit, Isolated Sigma-Delta Modulator
Key Features
• 5 MHz to 21 MHz master clock input frequency
• Offset drift vs. temperature: ±0.6 μV/°C maximum
• SNR: 86 dB typical
• 16 bits, no missing codes
• Full-scale analog input voltage range: ±320 mV
• ENOB: 14 bits typical
• IDD1: 10 mA maximum
• On-board digital isolator
• Operating temperature range: −40°C to +125°C
• High common-mode transient immunity: 150 kV/μs minimum, VDD2= 3.3 V
• Wide-body SOICs16-lead SOIC_W8-lead SOIC_IC with increased creepage
• 16-lead SOIC_W
• 8-lead SOIC_IC with increased creepage
• Safety and regulatory approvals8-lead SOIC_ICUL 1577VISO= 5700 V rms for 1 minuteIEC/EN/CSA 62368-1IEC/CSA 60601-1IEC/CSA 61010-1DIN EN IEC 60747-17 (VDE 0884-17)VIORM= 1401 VPEAK16-lead SOIC_ICUL 1577VISO= 5700 V rms for 1 minuteIEC/EN/CSA 62368-1IEC/CSA 60601-1IEC/CSA 61010-1DIN EN IEC 60747-17 (VDE 0884-17)VIORM= 1401 VPEAK
• 8-lead SOIC_ICUL 1577VISO= 5700 V rms for 1 minute
• UL 1577VISO= 5700 V rms for 1 minute
• VISO= 5700 V rms for 1 minute
• IEC/EN/CSA 62368-1
• IEC/CSA 60601-1
• IEC/CSA 61010-1
• DIN EN IEC 60747-17 (VDE 0884-17)VIORM= 1401 VPEAK
• VIORM= 1401 VPEAK
• 16-lead SOIC_ICUL 1577VISO= 5700 V rms for 1 minute
• UL 1577VISO= 5700 V rms for 1 minute
• VISO= 5700 V rms for 1 minute
• IEC/EN/CSA 62368-1
• IEC/CSA 60601-1
• IEC/CSA 61010-1
• DIN EN IEC 60747-17 (VDE 0884-17)VIORM= 1401 VPEAK
• VIORM= 1401 VPEAK
Description
AI
The ADuM7701 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 Analog Devices, Inc.,iCoupler® technology. The device operates from a 4.5 V to 5.5 V power supply range (VDD1) and accepts a pseudo differential input signal of ±250 mV (±320 mV full-scale). The pseudo 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 21 MHz. The original information can be reconstructed with an appropriate sinc3 digital filter to achieve an 86 dB signal-to-noise ratio (SNR) at 78.1 kSPS with a 256 decimation rate and a 20 MHz main clock. The serial input and output operates from a 5 V or a 3 V supply (VDD2).The serial interface is digitally isolated. High speed complementary metal-oxide semiconductor (CMOS) technology, combined with monolithic transformer technology, results in the on-chip isolation providing outstanding performance characteristics, superior to alternatives such as optocoupler devices. The ADuM7701 device is available in both a 16-lead and an 8-lead wide-body SOIC and has an operating temperature range of −40°C to +125°C.ApplicationsShunt curent monitoringAC motor controlsPower and solar invertersWind turbine invertersAnalog-to-digital and optoisolator replacement
