ZR431LF01TC

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The ZR431LF01TC is a versatile precision voltage reference device primarily intended as a reference in systems with integrated analog-to-digital converters. It offers high accuracy, tight temperature coefficient, and low noise with a variety of output voltages.

Application Field

The ZR431LF01TC voltage reference can be typically used in DC motor speed control, space-limited precision instrumentation, automatic test equipment and medical equipment. This voltage reference is also used in multi-channel data acquisition systems, closed-loop process control, industrial automation and robotics.

The device is used in precision systems including amplifiers and voltage regulators. The ZR431LF01TC provides an accurate output current in a wide range of temperatures, allowing accurate and efficient precision measurement systems that don’t need an internal power supply or trimming.

Working Principle

The ZR431LF01TC integrated circuit is a 3-terminal, programmable voltage reference. Its output voltage is selected with an external voltage divider resistors. The output voltage is set to 0.5V below the voltage applied to the REF IN terminal. It includes a bandgap reference connected to a buffer to provide a constant voltage output.

The output voltage is temperature compensated by a circuitry that uses two external temperature sensitive resistors (NTCs). It works in its temperature range of -40°C to +125°C, making sure the accuracy of the voltage reference is maintained over the application temperature range. The maximum output current is limited to 100 µA.

The ZR431LF01TC is fully specified from supply voltages from 2.7V to 10V, making it suitable for use in systems with integrated A/D converters and low-power systems. The reference voltage appears at the REF OUT node and it is temperature stable over all supply voltages. Its dynamic stability is also excellent, making it ideal for PID control loops and dynamic regulation systems.

The device has a low power consumption of 2mA typical, allowing it to be used in low power systems. The maximum supply current is 5mA. The reference voltage and differential output voltage is also very low, making it very suitable for applications requiring low current and low voltage.

The ZR431LF01TC is available in a variety of packages, providing designers with additional flexibility. These include SOT-23, SOT-223, TSSOP and TO-220 packages. The device is RoHS compliant, which means it can be used in green and environmental friendly systems.

In summary, the ZR431LF01TC is a versatile precision voltage reference device primarily intended as a reference in systems with integrated analog-to-digital converters. It provides temperature stability over a wide temperature range and offers excellent dynamic stability, making it ideal for precision systems. The device is available in a variety of packages, is RoHS compliant and has a very low power consumption.

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