Optically Isolated Sigma-Delta Modulator

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The HCPL-7560 Sigma-Delta Modulator optically Isolated Modulator and HCPL-0872 Digital Interface IC or digital filter together form a optocoupler isolated programmable two-chip analog-to-digital converter. The isolated Sigma-Delta Modulator allows direct measurement of motor phase currents in power inverters.

In operation, the HCPL-7560 Sigma-Delta isolated Modulator (optocoupler with 3750 Vrms dielectric withstand voltage rating) converts a low-bandwidth analog input into a high-speed one-bit data stream by means of a Sigma-Delta isolated over-sampling modulator. This modulation provides for high noise margins and excellent immunity against isolation-mode transients. The sigma-delta modulator data and on-chip sampling clock are encoded and transmitted across the isolation boundary where they are recovered and decoded into separate high-speed clock and data channels.




  • 8-bit Linearity
  • 200 ns Conversion Time (Pre-Trigger Mode 2 with HCPL-0872)
  • 8-bit Effective Resolution with 6 us Signal Delay (14-big with 103 us with HCPL-0872)
  • Fast 3 us Over-Range Detection (with HCPL-0872)
  • /- 200 mV Input Range with Single 5 V Supply
  • 5% Internal Reference Voltage Matching
  • Offset Calibration (with HCPL-0872)
  • -40oC to 85oC Operating Temperature Range
  • 15 kV/us isolation Transient Immunity
  • Safety Approval:
    UL 1577, CSA and IEC/EN/DIN EN 60747-5-2
  • Options available are:
    060 = IEC/EN/DIN EN 60747-5-2, Viorm = 891 Vpeak
    300 = Gull Wing Surface Mount Option
    500 = Tape and Reel Packaging Option
    xxxE = Lead-Free Option


  • Motor Phase and Rail Current Sensing
  • Data Acquisition Systems
  • Industrial Process Control
  • Inverter Current Sensing
  • General Purpose Current Sensing and Monitoring

Lifecycle Status



  • RoHS
    Pb & Pb-free options available

Lifecycle Status


Substance Compliance

  • RoHS
    Pb & Pb-free options available
Specification Value
Lifecycle Active
Distrib. Inventory Yes
Samples Available Yes
RoHS6 Compliant Pb & Pb-free options available
Max Qty of Samples 20
Product Type Isolated Modulator
Package 300mil DIP-8
Operating Temperature Deg C -40 to +85
Gain Error at 25 Deg C (%) Max ±5
VDD2 (V) 4.5 - 5.5
CMR (min.) (V/µs) 20000.0
Vcm (V) 1000.0
UL Insulation Rating Viso (VRMS) 3750.0
IEC Maximum Working Insulation Voltage Viorm (VPEAK) 891.0


Application Brief (1) i
Application Note (4) i
Brochures (2) i
Data Sheet (1) i
Design Guide (1) i
Options Data Sheet (2) i
Product Change Notice (PCN) (10) i
Reliability Data Sheet (1) i
Selection Guide (2) i
White Papers (4) i