H11A1TVM

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Optoisolators - Transistor, Photovoltaic Output

An H11A1TVM optoisolator is a type of optocoupler with low voltage transistor output, meaning it can be used for signal isolation between two circuits with varying input and output voltage levels. The optoisolator consists of an infrared LED emitter and a phototransistor junction to detect the incoming signal. This device is designed to operate over a wide range of environmental conditions, including temperatures from -40°C to +85°C, and can detect both DC and AC input signals.

The H11A1TVM optoisolator features fast response time of 1.5 microseconds and low off-state leakage of 0.1µA. It provides a reliable 3000V AC or 4000V DC dielectric isolation to protect the controlled circuit from high voltage transients in the input signal. The LED output is also kept safe from excessive voltage by a built-in circuit protection.

H11A1TVM Application and Working Principle

The H11A1TVM optoisolator has a variety of applications, the most common of which is to prevent noise and high voltage in circuits. It is commonly used in low level signal isolation between two circuits, such as connecting an isolated load to a microcontroller or for connecting two circuits in a noisy or high voltage environment. The optoisolator is also used to transmit signals from low voltage drivers to higher voltage applications such as motor control.

In order to understand the operation of the H11A1TVM optoisolator, it is important to understand the basic principles of how an optocoupler works. A optocoupler consists of two parts - an LED, which emits light when an electrical signal is applied, and a phototransistor, which detects the light from the LED and produces an electrical output. When an electrical signal is applied to the LED, it emits light, activating the phototransistor. The phototransistor then controls the current of an output transistor to produce an electrical output. This input and output are isolated from each other, meaning that any noise or high voltage present in one circuit will not be present in the other.

The H11A1TVM optoisolator utilizes these same principles but with a few additional features. The built-in circuit protection ensures that the LED output is not damaged by sudden voltage spikes. The device also features an open collector DC output, meaning it can be used in a variety of applications that require both low level and high level outputs.

The H11A1TVM optoisolator is a reliable and cost-effective solution for signal isolation between two circuits with varying input and output voltage levels. Its wide operating temperature range and low off-state leakage make it suitable for a range of applications, including motor control, low level signal transmission, and noise and high voltage protection.

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