REF193GSZ

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The REF193GSZ is a precision low-power voltage reference designed to meet the high accuracy and low dropout voltage requirements of high efficiency, precision analog and digital circuits. It has a temperature coefficient of just 0.7 ppm/°C over the full industrial temperature range and a wide input voltage range of up to 36 volts. The REF193GSZ offers a wide output range of 0.25V to 42V with a maximum output current of 350mA and a typical output error of +/- 0.1%. The device also features input protection, an under-voltage lockout, and noise-filtering, making it an ideal solution for powering precision analog and digital circuits in applications ranging from datacom, to consumer electronics, to automotive markets.

The REF193GSZ is classified as a PMIC (Power Management Integrated Circuit) and belongs to the Voltage Reference family. The application field for the REF193GSZ is in precision analog and digital circuits where a high-accuracy and low-power voltage reference is required. It is ideal for low-voltage circuits that must meet the power efficiency, accuracy and reliability specifications of today’s demanding applications. The REF193GSZ is also an ideal choice for powering high-speed analogue-to-digital converters, digital-to-analogue converters and low-dropout regulators.

In terms of its working principle, the REF193GSZ is a voltage reference circuit which comprises a bandgap reference and a current mirror circuit. The bandgap reference circuit is based on a diode connected PNPN bipolar transistor and a point-contact transistor in a Darlington configuration. The current mirror circuit is formed from high and low current transistors (in a ratio of 4:1), which generate a fraction of the bandgap reference current. This fraction is then fed back to the input of the bandgap reference, thus providing the voltage reference with low noise and high accuracy.

The REF193GSZ’s output is designed to be buffered using a series-connected transistor and an output resistor. This provides a stable output voltage and ensures minimum noise. Additionally, the REF193GSZ offers temperature compensation capabilities, with a temperature coefficient as low as 0.7 ppm/°C over the full industrial temperature range. This enables higher accuracy under temperature variations and extreme environments.

Overall, the REF193GSZ is an ideal choice for providing high-accuracy, low-power and low-noise voltage references for precision analog and digital circuits that must meet tight efficiency and reliability requirements. Its wide input voltage range of up to 36V, low-temperature coefficient, and noise-filtering capabilities make it well-suited for powering low-voltage circuits in demanding applications.

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