AD581TH

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Analog Devices AD581TH is a programmable temperature compensated voltage reference that is designed as a pin compatible upgrade for older voltage references. It offers superior accuracy and stability over a wide temperature range compared to previous voltage references and is ideal for applications that require tight control of the output voltage, such as power supply design, data acquisition, industrial automation, and instrumentation.

The AD581TH is a three-terminal programmable voltage reference, with a supply voltage range of 3V to 9V. The device features an externally programmable output voltage range of 0.9V to 5.5V, and an output current of up to 10mA. The device also includes an internal, temperature compensated bandgap reference, which ensures that the output voltage is stable over a wide temperature range (from -40°C to +125°C).

The working principle of the AD581TH is quite simple. The device is connected to an external voltage source, or a power supply, and then an external reference voltage is applied to the reference input of the device. The internal comparator compares the reference voltage to a precision bandgap voltage reference. The output will then be adjusted, using a combination of an adjustable reference current and a linear output circuitry, to achieve the desired output voltage.

The AD581TH is suitable for applications where a programmable voltage reference is necessary. Examples include battery-powered systems, industrial or automotive applications, or in any system where the load can be expected to change or vary. In addition to providing high accuracy and tight voltage control, the on-chip temperature compensation ensures that the output voltage remains stable and accurate even at wide temperature ranges.

The AD581TH is also well suited for applications where a high degree of accuracy and precision is required, such as in data acquisition systems, medical equipment, and instrumentation. With its wide operating range and temperature compensation feature, combined with its small size and low cost, the AD581TH is an excellent choice for a wide variety of applications where a programmable voltage reference is needed.

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