| Parameter | Symbol | Conditions | Min | Typ | Max | Unit | |-----------|--------|-------------|-----|-----|-----|------| | Forward Voltage | V_F | I_F = 20 mA | 1.2 | 1.4 | 1.6 | V | | Reverse Leakage | I_R | V_R = 6 V | - | - | 10 | μA | | Capacitance | C_in | V=0V, f=1MHz | - | 30 | - | pF |
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) : Certified protection between 3750 Vrms to 5300 Vrms depending on the exact housing variant. a1458 optocoupler datasheet
: Delivers impressive performance with typical propagation delays as low as and data rates reaching up to Exceptional Noise Immunity
To safely use the A1458, you must correctly calculate the input current-limiting resistor ( Rincap R sub i n end-sub ) and the output pull-up resistor ( Rpullcap R sub p u l l end-sub Step 1: Calculate the Input Resistor ( Rincap R sub i n end-sub | Parameter | Symbol | Conditions | Min
If the exact A1458 model is unavailable, the following alternatives can be considered, but verify pin-to-pin compatibility via their respective datasheets:
Switching speed is heavily dependent on the load resistor (R_L). A smaller R_L reduces the time constant (R_L * C_CE) but also reduces output voltage swing. For higher speeds (>100 kHz), consider a phototransistor optocoupler with a base access pin or a digital optocoupler. For higher speeds (>100 kHz), consider a phototransistor
Electrical characteristics define how the optocoupler performs under normal working conditions ( Input Characteristics Test Conditions Forward Voltage VFcap V sub cap F Reverse Current IRcap I sub cap R Terminal Capacitance Ctcap C sub t Output Characteristics Test Conditions Collector Dark Current ICEOcap I sub cap C cap E cap O end-sub Collector-Emitter Breakdown BVCEOcap B cap V sub cap C cap E cap O end-sub Emitter-Collector Breakdown BVECOcap B cap V sub cap E cap C cap O end-sub Transfer Characteristics Test Conditions Current Transfer Ratio CTRcap C cap T cap R Saturation Voltage
Extremely high common mode transient immunity (CMTI) ensures reliable performance in "noisy" industrial environments.