High-Linearity Analog Optocouplers

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The HCNR201 high-linearity analog optocoupler consists of a high-performance AlGaAs LED that illuminates two closely matched photodiodes. The input photodiode can be used to monitor, and therefore stabilize, the light output of the LED. As a result, the nonlinearity and drift characteristics of the LED can be virtually eliminated. The output photodiode produces a photocurrent that is linearly related to the light output of the LED. The close matching of the photodiode and advanced design of the package ensure the high linearity and stable gain characteristics of the optocoupler.

The HCNR201 can be used to isolate analog signals in a wide variety of applications that require good stability, linearity, bandwidth and low cost. The HCNR201 is very flexible and, by appropriate design of the application circuit, is capable of operating in many different modes, including: unipolar/bipolar, AC/DC and inverting/non-inverting. The HCNR201 is an excellent solution for many analog isolation problems.




  • Low Nonlinearity: 0.01%
  • K3 (IPD2/IPD1) Transfer Gain: /-5%
  • Low Gain Temperature Coefficient: -65 ppm/ degrees C
  • Wide Bandwidth - DC to > 1 MHz
  • Worldwide Safety Approval:
UL 1577 Recognized (5 kV rms/1 min Rating)
CSA Approved
IEC/EN/DIN EN 60747-5-2 Approved VIORM = 1414 V peak (Option 050)
  • Surface Mount Option Available (Option 300)
  • 8-Pin DIP Package - 0.400" Spacing
  • Allows Flexible Circuit Design
  • Special Selection for HCNR201: Tighter K1, K3 and Lower Nonlinearity Available
  • Options available are:
060 = IEC/EN/DIN/EN 60747-5-2 VIORM = 1414 V peak Option
300 = Gull Wing Surface Mount Lead Option
500 = Tape/Reel Package Option (1 k min.)
XXXE = Lead Free Option


  • Low Cost Analog Isolation
  • Telecom: Modem, PBX
  • Industrial Process Control:
    Transducer Isolater
    Isolater for Thermocouplers
    4 mA to 20 mA Loop Isolation
  • SMPS Feedback Loop, SMPS Feedforward
  • Monitor Motor Supply Voltage
  • Medical

Lifecycle Status


Substance Compliance

  • RoHS
    Pb & Pb-free options available
Specification Value
Lifecycle Active
Distrib. Inventory Yes
CTR Max. (%) 0.72
CTR Min. (%) 0.36
RoHS6 Compliant Pb & Pb-free options available
Product Type High Linearity Analog
Application Brief1 i
Application Note9 i
Brochures2 i
FAQs2 i
Obsolescence Notice1 i
Options Data Sheet6 i
Product Change Notice (PCN)13 i
Regulatory Certificate2 i
Reliability Data Sheet2 i
Selection Guide2 i
Technical Notes2 i
White Papers3 i
Promotional Material1 i