ISL43120IHZ-T Integrated Circuits (ICs)

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ISL43120IHZ-T Application Field and Working Principle

The ISL43120IHZ-T is part of a family of middle-speed, low power, quad analog multiplexers/demultiplexers. It is used to route and access multiple analog signals to/from one location by means of electrical signals. This product falls into the Interface - Analog Switches, Multiplexers, Demultiplexers group which has a wide range of applications.

Applications of ISL43120IHZ-T

This device has various applications such as ADC/DAC switching, instrumentation, gain/offset selection and sensor isolation. It can be used in applications requiring general purpose switching such as video switching, multiplexed I/O, and digitizers. It is often used as part of a signal chain in medical or automotive systems. This device has very low on resistance and so it is suitable for high-precision data acquisition systems. Due to its low power consumption characteristics, it is often preferred for battery-operated devices. In addition, the ISL43120IHZ-T has excellent ESD and latch-up immunity, making it useful for portable devices.

Working Principle of ISL43120IHZ-T

This device consists of four independent, single-pole/single-throw switches. Each switch consists of two pins: an input pin (S) and an output pin (D). To control the switches, select (or control) pins (CS1 and CS2) must be held high or low. A high level on the select pin closes the associated switch, while a low level on the select pins opens them. The ISL43120IHZ-T has a power-on reset feature that sets all switches in the off state. The device operates in complement select mode, meaning that if CS1 is high, CS2 must be low to close the switch. Both select pins must be held low to ensure the switch is open.

The device also has TTL and CMOS compatible logic inputs and outputs. The logic inputs have TTL compatible levels with Schmitt-trigger buffers, while the logic outputs are in open-drain configuration capable of sinking up to 500µA. It also has built-in overvoltage protection for the inputs. To ensure the power-on reset feature is always active, the device has an active low reset input. The device is offered in a narrow 8-pin SOIC package and has commercial, industrial and automotive grade options.

Conclusion

The ISL43120IHZ-T is part of a family of middle-speed, low power, quad analog multiplexers/demultiplexers, ideal for ADC/DAC switching, instrumentation, gain/offset selection and sensor isolation applications. It can also be used in high-precision data acquisition systems as it has very low on resistance. The device also has TTL and CMOS compatible logic inputs and outputs and offers excellent ESD and latch-up immunity. The device is offered in a narrow 8-pin SOIC package and has commercial, industrial and automotive grade options.

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