Optoelectronics I: Optocouplers
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The element14 ESSENTIALS of Optocouplers covers the concepts, design, and implementation of optocouplers: light emitting diodes integrated with a photodetector in one package to provide electrical insulation and signal isolation.
Darlington Output Transistors
The HCNW139-000EHCNW139-000E is a 1-channel 8-pin low input current High Gain Optocoupler using a light emitting diode and an integrated high gain photodetector to provide extremely high current transfer ratio between input and output. Separate pins for the photodiode and output stage result in TTL compatible saturation voltages and high speed operation. Where desired the VCC and VO terminals may be tied together to achieve conventional photodarlington operation. A base access terminal allows a gain bandwidth adjustment to be made. It is suitable for use in CMOS, LSTTL or other low power applications. A 400% minimum current transfer ratio is guaranteed over 0 to 70°C operating range for only 0.5mA of LED current. It is suitable for low input current line receiver, high voltage insulation, EIA RS-232C line receiver, telephone ring detector and low power systems - ground isolation.
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The HCPL-0701-500E is a 1-channel 8-pin low input current High Gain Optocoupler using a light emitting diode and an integrated high gain photodetector to provide extremely high current transfer ratio between input and output. Separate pins for the photodiode and output stage result in TTL compatible saturation voltages and high speed operation. Where desired the VCC and VO terminals may be tied together to achieve conventional photodarlington operation. A base access terminal allows a gain bandwidth adjustment to be made. It is suitable for use in CMOS, LSTTL or other low power applications. A 400% minimum current transfer ratio is guaranteed over 0 to 70°C operating range for only 0.5mA of LED current. It is suitable for low input current line receiver, EIA RS-232C line receiver, telephone ring detector and low power systems - ground isolation.
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Digital Output Optocouplers
HCPL-0600-500E Optocoupler, Digital Output, 1 Channel, 3.75 kV, 10 Mbaud, SOIC, 8 Pins
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The HCPL-0600-500E is a 1-channel 8-pin surface-mount optically coupled Logic Gate Optocoupler combining a GaAsP light emitting diode and an integrated high gain photodetector. An enable input allows the detector to be strobe. The output of the detector IC is an open collector Schottky-clamped transistor. This unique design provides maximum AC and DC circuit isolation while achieving TTL compatibility. The Optocoupler AC and DC operational parameters are guaranteed from -40 to 85°C allowing trouble-free system performance. It is suitable for high speed logic interfacing, input/output buffering, as line receivers in environments that conventional line receivers cannot tolerate and is recommended for use in extremely high ground or induced noise environments.
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HCPL-2231-300EHCPL-2231-300E Optocoupler, 2 Channel, 3.75 kV, 5 Mbaud, Surface Mount DIP, 8 Pins
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The HCPL-2231-300EHCPL-2231-300E is a 2-channel 8-pin surface-mount optically-coupled Logic Gate Optocoupler containing an AlGaAs LED. The detectors have totem pole output stages and optical receiver input stages with built-in Schmitt triggers to provide logic-compatible waveforms, illuminating the need for additional wave shaping. The electrical and switching characteristics of the HCPL-2231 is guaranteed from -40 to 85°C and a VCC from 4.5 to 20V. Low IF and wide VCC range allows compatibility with TTL, LSTTL and CMOS logic and result in lower power consumption compared to other high speed couplers. Logic signals are transmitted with a typical propagation delay of 150ns. It is suitable for isolation of high speed logic systems, microprocessor system interfaces, ground loop elimination, pulse transformer replacement, high speed line receiver and power control system.
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Gate Drive Output Optocouplers
HCPL-3120-000EHCPL-3120-000E Optocoupler, Gate Drive Output, 1 Channel, DIP, 8 Pins, 3.75 kV
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The HCPL-3120-000EHCPL-3120-000E from Avago is a through hole, 2.5A output current IGBT gate drive Optocoupler in 8 pin DIP package. The device contains a GaAsP LED which is optically coupled to an integrated circuit with a power output stage. This device is ideally suited for driving power IGBTs and MOSFETs.
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HCPL-0710-000EHCPL-0710-000E Optocoupler, Gate Drive Output, 1 Channel, SOIC, 8 Pins, 3.75 kV
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The HCPL-0710-000EHCPL-0710-000E is a 40ns Propagation Delay Optocoupler utilizing CMOS IC technology to achieve outstanding performance with very low power consumption. It requires only two bypass capacitors for complete CMOS compatibility. A CMOS logic input signal controls the LED driver IC which supplies current to the LED. The detector IC incorporates an integrated photodiode, a high-speed trans-impedance amplifier and a voltage comparator with an output driver.
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Linear Optocouplers
HCNR201-000EHCNR201-000E Optocoupler, Linear Optocouplers, 1 Channel, DIP, 8 Pins, 5 kV
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The HCNR201-000EHCNR201-000E from Avago is a high linearity analogue Optocoupler in 8 pin DIP package. This 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 non linearity and drift characteristics of the LED can be virtually eliminated. This Optocoupler is used to isolate analogue signals in a wide variety of applications that require good stability, linearity, bandwidth and low cost. The device is widely used at low cost analogue isolation, modem, PBX, industrial process control such as transducer isolator and isolator for thermocouples 4mA to 2mA loop isolation, SMPS feedback loop, SMPS feed forward and monitor motor supply voltage.
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HCNR200-300EHCNR200-300E Optocoupler, Linear Optocouplers, 1 Channel, Surface Mount DIP, 8 Pins, 5 kV
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The HCNR200-300EHCNR200-300E from Avago is a high linearity analogue optocoupler in 8 pin surface mount DIP package. This 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 non linearity and drift characteristics of the LED can be virtually eliminated. This Optocoupler is used to isolate analogue signals in a wide variety of applications that require good stability, linearity, bandwidth and low cost. Appropriate design of the application circuit handle operating in many different modes such as unipolar/bipolar, ac/dc and inverting/non-inverting. HCNR200-300EHCNR200-300E is widely used at low cost analogue isolation, modem, PBX, industrial process control such as transducer isolator and isolator for thermocouples 4mA to 2mA loop isolation, SMPS feedback loop, SMPS feed forward and monitor motor supply voltage.
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Optically Isolated Amplifiers
HCPL-7520-300EHCPL-7520-300E Optocoupler, Optically Isolated Amplifiers, 1 Channel, Surface Mount DIP, 8 Pins, 3.75 kV, 100 kHz
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The HCPL-7520-300EHCPL-7520-300E is an isolated Linear Sensing IC designed for current sensing in servo drive applications. In a typical implementation, motor current flows through an external resistor and the resulting analogue voltage drop is sensed by the IC. An output voltage is created on the other side of the IC optical isolation barrier. The 1-ended output voltage is proportional to the motor current. Since common-mode voltage swings of several hundred volts in tens of nanoseconds are common in modern switching inverter motor drives, the IC was designed to ignore very high common-mode transient slew rates The high CMR capability of the isolation amplifier provides the precision and stability needed to accurately monitor motor current in high noise motor control environments, providing for smoother control in various types of motor control applications.
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HCPL-7510-300EHCPL-7510-300E Optocoupler, Optically Isolated Amplifiers, 1 Channel, Surface Mount DIP, 8 Pins, 3.75 kV, 100 kHz
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The HCPL-7510-300EHCPL-7510-300E is an isolated Linear Current Sensing IC designed for current sensing in low-power servo drive applications. In a typical implementation, motor current flows through an external resistor and the resulting analogue voltage drop are sensed by an isolation amplifier. An output voltage is created on the other side of an isolation amplifier optical isolation barrier. The 1-ended output voltage is proportional to the motor current. Since common-mode voltage swings of several hundred volts in tens of nanoseconds are common in modern switching inverter motor drives, an isolation amplifier was designed to ignore very high common-mode transient slew rates. The high CMR capability of the isolation amplifier provides the precision and stability needed to accurately monitor motor current in high noise motor control environments, providing for smoother control in various types of motor control applications.
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Transistor Output Optocouplers
HCPL-817-000EHCPL-817-000E Optocoupler, Transistor Output, 1 Channel, DIP, 4 Pins, 50 mA, 5 kV, 50%
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The HCPL-817-000EHCPL-817-000E is a high density mounting type phototransistor optocoupler for general purpose. It contains a light emitting diode optically coupled to a phototransistor. Input-output isolation voltage is 5000Vrms. Response time (tr) is typically 4µs and minimum CTR is 50% at input current of 5mA.
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ACPL-247-500E Optocoupler, Transistor Output, 4 Channel, SOIC, 16 Pins, 50 mA, 3 kV, 50%
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The ACPL-247-500E from Avago is a surface mount DC input quad channel half pitch phototransistor optocoupler in 16 pin SO package. This Optocoupler is widely used as I/O interface for programmable controllers, computers, sequence controllers, system appliances and signal transmission between circuits of different potentials and impedances.
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Optocouplers - Miscellaneous
HCPL-3120-000EHCPL-3120-000E Optocoupler, Gate Drive Output, 1 Channel, DIP, 8 Pins, 3.75 kV, HCPL-3120/J312; HCNW3120
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The HCPL-3120-000EHCPL-3120-000E from Avago is a through hole, 2.5A output current IGBT gate drive Optocoupler in 8 pin DIP package. The device contains a GaAsP LED which is optically coupled to an integrated circuit with a power output stage. This device is ideally suited for driving power IGBTs and MOSFETs.
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HCNW3120-300EHCNW3120-300E Optocoupler, Gate Drive Output, 1 Channel, Surface Mount DIP, 8 Pins, 5 kV
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The HCNW3120-300EHCNW3120-300E is a 2.5A Output Current IGBT Gate Drive Optocoupler containing an AlGaAs LED. The LED is optically coupled to an integrated circuit with a power output stage. It is ideally suited for driving power IGBTs and MOSFETs used in motor control inverted applications. The high operating voltage range of the output stage provides the drive voltages required by gate controlled devices. The voltage and current supplied make it ideally suited for directly driving IGBTs with ratings up to 1200V/100A.
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