Analog Devices Inc. ADuM7702 16-bit Sigma-Delta Modulators

Analog Devices Inc. ADuM7702 16-bit Sigma-Delta Modulators utilize iCoupler® technology to convert analog input signals to high-speed single-bit data streams with on-chip digital isolation. These modulators accept a pseudo-differential input signal of ±50mV (±64mV full-scale) and operate from a 4.5V to 5.5V power supply range (VDD1). This pseudo-differential input is ideally suited to shunt voltage monitoring in high-voltage applications where galvanic isolation is required. The analog input of the ADuM7702 modulators is continuously sampled by a high-performance analog modulator. This input signal is then converted into a digital density output stream with a data rate of up to 21MHz.

The Analog Devices Inc. ADuM7702 Modulators can reconstruct the original information with an appropriate sinc3 digital filter to achieve an 82dB Signal-to-Noise Ratio (SNR). These modulators are available in both 16-lead SOIC_W and 8-lead SOIC_IC packages and operate within -40°C to 125°C temperature range. Typical applications include shunt current monitoring, AC motor controls, power, and solar inverters, and wind turbine inverters.


  • 5MHz to 21MHz master clock input frequency
  • ±0.25µV/°C offset drift vs. temperature
  • 82dB typical SNR
  • 16-bits, no missing codes
  • ±64mV full-scale analog input voltage range
  • 13-bits typical ENOB
  • 10mA maximum IDD1
  • On-board digital isolator
  • -40°C to 125°C operating temperature range
  • High isolation common-mode transient immunity:
    • 150kV/µs minimum, VDD2 = 3.3V
  • Wide-body SOICs:
    • 16-lead SOIC_W
    • 8-lead SOIC_IC with increased creepage
  • Safety and regulatory approvals:
    • UL recognition
    • 5700Vrms for 1 minute per UL 1577
    • CSA component acceptance notice 5A
    • VDE certificate of conformity


  • Shunt current monitoring
  • AC motor controls
  • Power and solar inverters
  • Wind turbine inverters
  • Analog-to-digital and optoisolator replacement


Block Diagram

Block Diagram - Analog Devices Inc. ADuM7702 16-bit Sigma-Delta Modulators
Published: 2020-09-04 | Updated: 2023-08-14