) Range: Adapts flexibly from to match common 3.3V logic platforms and standard 5V TTL systems. Current Consumption ( ICCcap I sub cap C cap C end-sub
: 3750 Vrms to 5000 Vrms (depending on the specific package and testing standard). Environmental Operating Temperature : Ranges from -40°C to +85°C. Pinout and Package The A1458 is typically housed in an 8-pin SOP (Small Outline Package) DIP-8 package Input Side
A look at the electrical parametric ratings from the HCPL-1458 / A1458 Datasheet reveals its optimization for low-power, high-speed digital applications:
Provides a minimum Common Mode Transient Immunity of 15 kV/µs up to 50 kV/µs at a common-mode voltage ( VCMcap V sub cap C cap M end-sub a1458 optocoupler datasheet
Ideal for high-speed data links like RS-232, RS-485, or CAN bus isolation. Replacement and Equivalents
Engineers specify the A1458 primarily for its fast operational speed, robust transient immunity, and resilient packaging. The technical parameters typically outlined on page one of the device's technical data include:
This configuration uses to improve noise performance and signal integrity. ) Range: Adapts flexibly from to match common 3
R2=VOutputISaturation=12V2mA=6kΩcap R sub 2 equals the fraction with numerator cap V sub cap O u t p u t end-sub and denominator cap I sub cap S a t u r a t i o n end-sub end-fraction equals the fraction with numerator 12 V and denominator 2 mA end-fraction equals 6 k cap omega (A standard resistor works optimally). 8. Troubleshooting and Implementation Best Practices
Inverter topologies, solar power converters, and variable-frequency motor drives utilize High-Power MOSFETs or IGBTs. The A1458 isolates the high-voltage power stage while sending sharp, distortion-free switching control pulses down to the gate-driver circuit. Single Channel, High Speed Optocouplers Technical Data
high-speed, single-channel optocoupler (also known as the HCPL-A1458 ) manufactured by Avago/Agilent Pinout and Package The A1458 is typically housed
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.
The A1458 is a standard speed optocoupler. It is great for low-frequency signals (relays, buttons, power switching). It is not suitable for high-speed data transmission (like Ethernet or high-speed SPI), as the transistor has a "saturation delay" (turn-off time) that slows the signal down.
Extremely high common mode transient immunity (CMTI) ensures reliable performance in "noisy" industrial environments.
The (often associated with the HCPL-1458 by Broadcom/Avago Technologies ) is a single-channel, high-speed, low-power optoisolator designed for critical digital logic and isolation applications. Renowned for its exceptional speed and high common-mode transient immunity (CMR), the A1458 is widely used in high-voltage industrial controls, motor drives, and telecommunications equipment.
IC=IF×CTR=10mA×1.0=10mAcap I sub cap C equals cap I sub cap F cross CTR equals 10 mA cross 1.0 equals 10 mA
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