Isolated 15-bit A/D Converter

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The HCPL-7860/HCPL-786J 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 modulator allows direct measurement of motor phase currents in power inverters used in automotive applications.

In operation, the HCPL-7860/HCPL-786J Isolated Modulator (optocoupler with 3750 VRMS dielectric withstand voltage rating) converts a lowbandwidth analog input into a high-speed one-bit data stream by means of a Sigma-Delta (Σ−∆) over-sampling modulator.

This modulation provides for high noise margins and excellent immunity against isolation-mode transients. The 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.




  • 12-bit Linearity
  • 800 ns Conversion Time (Pre-Trigger Mode 2)
  • 5 Conversion Modes for Resolution/Speed Trade-Off; 12-bit Effective Resolution with 20 us Signal Delay (14-bit with 103 us)
  • Fast 3 us Over-Range Detection
  • Serial I/O (SPI,QSPI and Microwire Compatible)
  • /-200 mV Input Range with Single 5 V Supply
  • 1% Internal Reference Voltage Matching
  • Offset Calibration
  • -40oC to 85oC Operating Temperature Range
  • 15 kV/us Isolation Transient Immunity
  • Regulatory Approvals; UL, CSA, IEC/EN/DIN EN 60747-5-2
  • Options available are:
300 = Gull Wing Surface Mount Option
500 = Tape and Reel Packaging Option
XXXE = Lead Free Option


  • Motor Phase and Rail Current Sensing
  • DC Bus Voltage sensing
  • Inverter Current Sensing
  • Switched Mode Power Supply Signal Isolation
  • General Purpose Current Sensing and Monitoring
  • General Purpose Analog Signal Isolation
  • Traditional Hall Effect Current Sensor Replacement

Lifecycle Status


Substance Compliance

  • RoHS
    Pb & Pb-free options available
Specification Value
Lifecycle Active
Distrib. Inventory Yes
RoHS6 Compliant Pb & Pb-free options available
Product Type Isolated Modulator
Package 300mil DIP-8
Operating Temperature Deg C -40 to +85
Gain Error at 25 Deg C (%) Max ±1
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
IEC Highest Allowable Overvoltage Viotm (VPEAK) 6000
Application Brief1 i
Application Note13 i
Brochures3 i
Data Sheet1 i
Design Guide1 i
FAQs2 i
Obsolescence Notice1 i
Options Data Sheet6 i
Product Change Notice (PCN)13 i
Promotional Material2 i
Regulatory Certificate3 i
Reliability Data Sheet2 i
Selection Guide2 i
White Papers5 i