MAX9065EBS+T

Linear - Comparators

The MAX9065EBS+T is a linear comparator which is designed for automotive operational environments. It is a wired-OR device and offers an industrial grade, a temperature-stability of 0.01%/°C. It has an internal signal-delay supply voltage regulator with an ultra-low input voltage tracking error and differential input noise-rejection ratio for improved signal-to-noise (SNR) performance.

The MAX9065EBS+T offers a wide range of features, including adjustable pull-up and pull-down current, with selectable pull-up/pull-down currents in the range of 5 mA to 15 mA. It also comes with a large input common-mode range (Vcm≤-0.3V) and a wide output voltage swing ranging from -0.3V to +7.0V.

The device provides a very low jam-spike current of 65mA on the output, along with a fast transient response. The device is protected from latch-up due to its input current overdrive protection circuit. It is protected from damage due to inrush current and over-voltage on the output.

Application Field

The MAX9065EBS+T is suitable for a variety of industrial applications, from low-power audio and video systems, to automotive audio and automotive power systems. It can be used for pulse-width modulation(PWM) signal processing in motor control systems, for throttle control, switch mode power supplies and in hot-swap power systems. The device can be used to detect low levels of current in automobile power systems, (ADC) analog-to-digital converters, audio system power supplies, or in miniaturized power applications. Additionally, it is suitable for Vref buffer applications as it offers a very low noise output.

Working Principle

The MAX9065EBS+T linear comparator is based on a classical differential amplifier architecture, with an adjustable pull-up and pull-down current feature. A voltage differential between the two input pins causes the output to go high or low, depending on the relative polarity. The comparator features a wide input voltage common-mode range, which ensures good common-mode rejection (CMRR). The input common-mode rejection (CMRR) is typically 75 to 80 dB, depending on the pull-up/pull-down currents.

When the input differential voltage is within the hysterisis range, the output remains at its current state, as long as the differential voltage stays within the hysteresis range. This is due to the adjustable hysteresis feature which can be set by selecting different pull-up/pull-down currents.

The MAX9065 is also protected against over-voltage and inrush current, thus providing a fail-safe feature which ensures that the device will not be damaged in case of an event involving a large inrush current or an overload.

Conclusion

The MAX9065EBS+T is a linear comparator which is specifically designed for automotive operational environments. It is ideal for applications such as pulse-width modulation(PWM) signal processing in motor control systems, switch mode power supplies, audio systems, and automotive audio and power systems. The device offers adjustable pull-up and pull-down current, with selectable pull-up/pull-down currents in the range of 5 mA to 15 mA, a wide input voltage common-mode range, and a wide output voltage swing ranging from -0.3V to +7.0V. It is protected from latch-up due to its input current overdrive protection circuit, and it is protected from damage due to inrush current and over-voltage on the output.