LX6431AILP

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PMIC - Voltage Reference

The LX6431AILP is the first in a line of ultra-high-precision voltage references from Linear Technology. It is designed to provide accurate voltage references for applications in the industrial, automotive, and medical fields. Its design is powered by high-performance technology and an on-chip temperature sensor.

The LX6431AILP has an incredibly wide operating range with a guaranteed minimum input voltage of 2.25V and a maximum input voltage of 6.5V. It features an ultra-low output impedance, with a selection of 5.01V, 7.03V, and 9V, with outputs individually adjustable down to 0.1%. It also features very low output noise, and a typical output accuracy of just 1mV in the full temperature range.

Additionally, the LX6431AILP features an on-chip temperature sensor, which is used to monitor and adjust the output voltage over temperature, providing a typical error of just 0.2mV over the full temperature range (-40°C to +125°C). It also features an integrated watchdog timer that can be programmed through an I2C interface or via external control pins. This helps ensure that if something goes wrong with the reference, it will not fail undetected, enabling enhanced reliability.

The LX6431AILP is ideal in a wide range of applications, including voltage references for precision data converters, automotive applications, and medical equipment. It is also useful for providing reference voltages for multi-channel ADC arrays and digital voltage supervisors for brownout conditions in microprocessors. Furthermore, the on-chip temperature sensor makes the LX6431AILP well-suited for temperature-sensing applications, such as automotive air-fuel ratio, or air-fuel mixture monitoring.

The LX6431AILP has a simple and efficient working principle, powered by an internal charge pump, PMOS and N-channel MOSFETs. In short, the charge pump creates a precise and adjustable reference voltage, which is then amplified and filtered in the output stage. The output is adjusted using a precise and linear voltage divider connected to the on-chip temperature sensor.

In conclusion, the LX6431AILP is a versatile and reliable voltage reference component, ideal for a range of industrial, automotive, and medical applications. It offers an incredibly wide input voltage range and low output noise, and an on-chip temperature sensor ensures accuracy in the full temperature range.

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