Manufacturer Part No: HCNRE. Order Code: Technical Datasheet: HCNRE Datasheet. See all Technical Docs. Broadcom HCNRE: available from 15 distributors. Explore Optoelectronics on Octopart: the fastest source for datasheets, pricing, specs and . HCNR/HCNR is UL Recognized with Vrms for 1 minute per UL . Mount. Wing & Reel 1 Minute rating VIORM = Vpeak. Quantity. E.
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External Creepage L IO2 Parameter Symbol Device Min. Precision analog isolation amplifier. Because a photodiode can conduct current in only one direction, two diodes D1 and D2 are used to steer the input current to the appropriate terminal of input photodiode PD1 to allow bipolar input currents.
HCNRE Avago Technologies US Inc., HCNRE Datasheet
Because the basic circuit operation has not changed, the circuit still has good gain stability. Figure 13 illustrates how to change the basic circuit to accommodate both positive and negative input and output voltages.
Normally the forward voltage drops of the diodes would cause a serious linearity or accuracy problem. The lower gains, higher input currents and higher offset voltages affect the accuracy of the circuit, but not the way it operates. It’s a datashret project which helps to repair anything.
In the high-speed circuit discussed above, hcnr021-000e input and output circuits are stabilized by reducing the local loop gains of the input and output circuits.
IMRR is defined as the ratio of the signal gain with signal applied to VIN of Figure 16 to the isolation mode gain with VIN connected to input common and the hcnr201-000s applied between the input and output commons at 60 Hz, expressed in dB.
An analysis similar to the one above yields the following expression relating output current to input voltage: The output circuit does not directly generate an output voltage which is sensed by R2, it instead uses Q1 to generate an output current which flows through R3.
IPD2 error to best fit line is the deviation below and above the best fit line, expressed as a percentage of the full scale output. IPD1 is equal to the current in R1 and is given by the following equation: Page 3 Package Outline Drawings High Speed High Precision ycnr201-000e. As a result, the non-linearity. Diodes D1 and D2 help reduce crossover distortion by keeping both amplifiers active during both positive and negative portions of the input signal.
RoHS 6 fully compliant options available. Two example circuits that operate with bipolar input signals are discussed in the next section. To achieve very high linearity for bipolar signals, the gain should be exactly the same for both positive and negative input polarities.
Q3 2N Vcc 5. This output current generates a voltage across R3, which is then sensed by R2. The output photodiode produces a photocur rent. LED forward voltage vs. Example Application Circuits The circuit shown in Figure 16 is a high-speed low-cost circuit designed for use in the feedback path of switchmode power supplies.
As in the simpler circuits, the input amplifier adjusts the LED current so that both of its input terminals are at the same voltage. CNR fig 8 This allows the designer to make perf- ormance trade-off s that would otherwise be diffi cult Also notice that IPD1 is exactly proportional to VIN, giving a very linear relationship between the input voltage and the photodiode dataasheet.
Typical photodiode leakage vs.
Device considered a two-terminal device: Units Test Conditions Fig. The fi nal circuit shown in Figure 19 isolates a bipolar analog signal using only one optocoupler and generates two output signals: A Parameter Symbol Input-Output Two topologies that allow for bipolar operation are shown in Figure It is also possible to convert this circuit into a fully bipolar circuit with a bipolar output signal by using the output of the 6N to drive some CMOS switches to switch the polarity of PD2 depending on the polarity of the input signal, obtaining a bipolar output voltage swing.
However, an additional amplifier is used to provide an appropriate offset voltage to the other amplifiers that exactly cancels the diode voltage drops to maintain circuit accuracy.
Data Sheet HCNR200 and HCNR201 High-Linearity Analog Optocouplers
Isolator for thermo couples 4 mA to 20 mA loop isola. IORM peak Example 2: Input photodiode CTR vs. Example Application Circuits The circuit shown Pins 1, 2, 3, and 4 shorted together and pins 5, 6, 7, and 8 shorted together. The input terminals of the op-amps and the photodiodes are connected in the circuit using Kelvin connections to help ensure the accuracy of the circuit. The first circuit has the obvious advantage of requiring only one optocoupler; however, the offset performance of the circuit is dependent on the matching of IOS1 and IOS2 and is also dependent on the gain of the optocoupler.
HCNR fig 2 0.
Package Outline Drawings High-speed datashewt analog isolator. Contact your Avago sales representative or authorized distributor for information. High-speed low-cost analog isolator. Assuming that A1 is a perfect op-amp, no current flows into the inputs of A1; therefore, all of the current flowing through R1 will flow through PD1.