The ACPL-C87AT-500E is a product from Broadcom (formerly Avago Technologies). It is an optocoupler, also known as an optoisolator, designed for high-speed digital signal transmission and is commonly used in industrial, automotive, and consumer applications where electrical isolation is required.
Detai LED Explanation of Pin Function Specifications:
The ACPL-C87AT-500E comes in a SO-16 (16-pin) surface-mount package.
Here’s a breakdown of the pin functions:
Pin Number Pin Function Pin 1 Anode of LED (Internal LED) Pin 2 Cathode of LED (Internal LED) Pin 3 No connection (NC) Pin 4 No connection (NC) Pin 5 Input, Data Input (Low-speed logic level) Pin 6 No connection (NC) Pin 7 Output, Data Output (Collector of photo transistor ) Pin 8 Ground (GND) Pin 9 Output, Data Output (Emitter of phototransistor) Pin 10 No connection (NC) Pin 11 VCC (Supply voltage for phototransistor) Pin 12 No connection (NC) Pin 13 Input, Data Input (High-speed logic level) Pin 14 No connection (NC) Pin 15 No connection (NC) Pin 16 VCC (Supply voltage for internal LED)Pin Description Summary:
LED Anode (Pin 1): The positive terminal of the LED. It is connected to the internal LED’s anode for signal transmission. LED Cathode (Pin 2): The negative terminal of the LED. NC Pins (Pins 3, 4, 6, 10, 12, 14, 15): These pins have no electrical connection and are reserved. Data Input (Pins 5 and 13): These are used for high-speed and low-speed data input. These pins are where the control signal is fed to drive the LED. Data Output (Pins 7 and 9): These are the output pins, which carry the signal after being transmitted through the phototransistor. Ground (Pin 8): Common ground for the circuit. VCC (Pins 11 and 16): These are the power supply pins that provide the necessary voltage to operate the internal phototransistor and LED.Circuit Principle:
The ACPL-C87AT-500E optocoupler works based on the principle of light transmission. The input electrical signal (applied to Pins 5 or 13) drives an internal LED (Pins 1 and 2), which emits light. This light is received by a phototransistor (Pins 7 and 9) on the output side. The phototransistor is connected to a collector and emitter configuration, allowing for the isolation of the input and output signals while still enabling signal transmission.
FAQ – Frequently Asked Questions:
1. What is the main function of the ACPL-C87AT-500E optocoupler? The ACPL-C87AT-500E optocoupler transmits data signals with electrical isolation between the input and output, typically used for isolating high-voltage circuits from low-voltage control circuits.
2. What is the pin configuration of the ACPL-C87AT-500E? The ACPL-C87AT-500E has 16 pins in total, with each pin serving specific functions like signal input, output, ground, and power supply.
3. How do I connect the input pins (Pin 5 and Pin 13) of the ACPL-C87AT-500E? Pins 5 and 13 are used to input signals to the internal LED. Pin 5 is used for low-speed signals, while Pin 13 is for high-speed signals.
4. What does Pin 1 represent in the ACPL-C87AT-500E? Pin 1 is the anode of the internal LED. This is where the current flows into the LED for signal transmission.
5. Can I connect Pin 2 (LED cathode) directly to ground? Yes, Pin 2 (LED cathode) should be connected to the ground to complete the current path for the LED.
6. What is the purpose of the NC pins (Pins 3, 4, 6, 10, 12, 14, 15)? The NC (No Connection) pins do not serve any function in the circuit and are not electrically connected. They are reserved.
7. How does the phototransistor output signal work on the ACPL-C87AT-500E? Pins 7 and 9 act as the collector and emitter of the phototransistor, transmitting the optically isolated signal from the input to the output.
8. What is the voltage rating for the VCC pins (Pin 11 and Pin 16)? The VCC pins are connected to the supply voltage and typically require a voltage between 4.5V and 5.5V for proper operation.
9. Can I use the ACPL-C87AT-500E in high-speed applications? Yes, the ACPL-C87AT-500E is capable of high-speed data transmission, particularly when using Pin 13 for high-speed logic levels.
10. What are the typical applications for the ACPL-C87AT-500E? Typical applications include industrial control, automotive systems, and consumer electronics where electrical isolation is needed between different sections of a circuit.
11. How is the ACPL-C87AT-500E powered? The ACPL-C87AT-500E requires a supply voltage (VCC) connected to Pins 11 and 16, with ground connected to Pin 8.
12. Can I use the ACPL-C87AT-500E in a high-voltage system? Yes, the optocoupler allows for isolation between high-voltage and low-voltage circuits, making it suitable for applications requiring electrical isolation.
13. Is the ACPL-C87AT-500E available in different packaging? The ACPL-C87AT-500E is commonly available in an SO-16 (16-pin) surface-mount package.
14. What is the maximum current rating for the LED in the ACPL-C87AT-500E? The LED inside the ACPL-C87AT-500E can handle a maximum current of approximately 50 mA.
15. How do I determine the response time of the ACPL-C87AT-500E? The response time is typically specified in the datasheet, but it depends on the input signal and load conditions.
16. Can the ACPL-C87AT-500E be used in both AC and DC circuits? Yes, the ACPL-C87AT-500E can be used in both AC and DC circuits, provided that the input signal is within the specified operating voltage range.
17. What is the operating temperature range for the ACPL-C87AT-500E? The operating temperature range for the ACPL-C87AT-500E is typically -40°C to 100°C.
18. What is the typical input signal voltage for the ACPL-C87AT-500E? The typical input signal voltage ranges from 4V to 5V, depending on the logic levels being used.
19. How should I handle the ACPL-C87AT-500E during assembly? Handle the ACPL-C87AT-500E with care during assembly, ensuring proper placement on the PCB and avoiding electrostatic discharge (ESD) to prevent damage.
20. Is the ACPL-C87AT-500E RoHS compliant? Yes, the ACPL-C87AT-500E is RoHS compliant, meaning it is free from hazardous materials like lead.
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