MAX901BESE+

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The MAX901BESE+ is a linear-comparator integrated circuit from Maxim Integrated that offers superior power-supply rejection, low supply-current, a wide supply range, low-voltage operation, open-drain output for rail-to-rail voltage-swings, and low propagation delay to meet various timing requirements.

The MAX901BESE+ is an excellent choice in applications where fast settling time, output current-driving capabilities, low input current, low temperature coefficients, and an active-low output are necessary. It can be used in several high-precision switch-controlling applications, like switching power supplies, DC motor-control systems, light dimmers, and motor-driven equipment control.

The MAX901BESE+ has a basic structure that consists of an input amplifier stage, a threshold detector and a reference current generator. It has two pins; one for the input voltage (VIN) and the other for the reference voltage or amplifier bias voltage (V REF ). This unique combination provides a low-offset voltage and wide input dynamic range.

The way the MAX901BESE+ works is as follows: A threshold detector is used to monitor the input voltage. When the input voltage VIN exceeds the predetermined voltage VREF, the threshold detector triggers an open-drain output. This provides a rail-to-rail voltage-swing. Moreover, the output goes active-low with a propagation delay of typically 360ns.

One of the most attractive features of the MAX901BESE+ is its high power-supply rejection ratio. It has a Noise-Rejection-Ratio (NRR) of 18dB and a Supply-Rejection-Ratio (SRR) of 75dB. This ensures a high degree of accuracy in noisy environments. Additionally, it features a “low” power-supply current of typically 2mA, which offers a degree of power savings in terms of battery-powered applications.

Finally, the MAX901BESE+ offers a wide dynamic supply range between 2.7V and 5.5V and an operating temperature range between -40°C to +125°C, which makes it well-suited to a variety of applications.

In summary, the MAX901BESE+ is an excellent choice for high-precision switch-controlling applications. It offers superior power-supply rejection, low supply-current, a wide supply range, low-voltage operation, open-drain output for rail-to-rail voltage-swings, and low propagation delay. Such features make the MAX901BESE+ a preferred choice for applications ranging from power supplies, DC motor-control systems, light dimmers, to motor-driven equipment control.

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