Analog Devices Inc. ADUM7704 16-Bit Isolated Sigma-Delta Modulators

Analog Devices Inc. ADUM7704 16-Bit Isolated Sigma-Delta Modulators converts analog input signala into a high speed, single-bit data stream. The device features on-chip digital isolation based on Analog Devices' iCoupler® technology. The modulator operates from a 4.5V to 20V power supply range (VDD1). It can accept a pseudo-differential input signal of ±50mV (±64mV full-scale). The pseudo-differential input is ideal for shunt voltage monitoring in high voltage applications where galvanic isolation is required.


  • 5MHz to 21MHz master clock input frequency
  • Offset drift vs. temperature: ±0.25μV/°C maximum
  • SNR: 82dB typical
  • 16 bits, no missing codes
  • Full-scale analog input voltage range: ±64mV
  • ENOB: 13-bits typical
  • IDD1: 10mA maximum
  • On-board digital isolator
  • Operating temperature range
    • −40°C to +125°C (16-lead SOIC_W)
    • −40°C to +105°C (8-lead SOIC_IC)
  • 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
      • DIN V VDE V 0884-10: VIORM = 1270 VPEAK
      • DIN V VDE V 0884-11: VIORM = 1060 VPEAK (pending)


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

Functional Block Diagram

Block Diagram - Analog Devices Inc. ADUM7704 16-Bit Isolated Sigma-Delta Modulators
Published: 2020-12-04 | Updated: 2023-08-14