MAX942AUA+T Datasheet/PDFThe MAX942AUA+T is a high-speed, high-voltage comparator family ideal for use in analog sensing and control applications. It is part of an extensive line of linear and comparator chips for communications and multimedia applications.
The MAX942AUA+T completes the MAX942 family, which includes features such as high-speed rise time, with a typical fall time of 200ns, and a wide operating temperature range from -40°C to 145°C. The chip also exhibits low power consumption, with a typical supply current of 2.6mA.
Application Field
The MAX942AUA+T is ideal for use in analog sensing and control applications. This includes applications such as current level sensing, over-voltage monitoring and temperature sensing. In addition, it can be used in detection and control of mechanical motion, eddy current, optical switch and analog-to-digital conversion applications.
MAX942AUA+T parts are also ideal for security systems, motor control and loop control systems, voltage regulation, and operation of hybrid electrical vehicles.
Working Principle
The MAX942AUA+T works on the concept of differential voltage detection, where two voltage inputs are compared to each other and the output indicate their relative magnitudes. Specifically, the family offers two comparators (A and B) whose outputs can be independently configured as either open-collector or complementary outputs for either voltage comparison and hysteresis or for threshold detection.
The operation of the chip is based on the process of comparing the differential voltages applied to the +IN and -IN pins. The A and B comparators, set to use hysteresis control, have configurable voltage thresholds to not just detect, but also control specific thresholds. In addition, each of the two comparators has a corresponding VL input pin to create positive, overall, or negative hysteresis.
The frequency of operation is set by adjusting the VL connections and the level of the thresholds. The family\'s response time can be set up to 1μs. This amazing agility allows the chip to detect fast changing conditions and then change the output accordingly, yielding intuitive control.
Package Options
The MAX942AUA+T family\'s product line includes seven versions in SOIC-8 (1mm Height) packaging, as well as a TSSOP-8 (1.2mm Height) package with exposed backside pad.
The 0°C to 70°C devices are available in China version and are RoHS compliant, while the -40°C to 105°C parts are available in Pb-free version and are RoHS compliant as well.
Conclusion
The MAX942AUA+T is sure to bring a range of new capabilities to analog sensing and control applications. The two comparators, high-speed and wide operating temperature range, low power consumption, and flexible package options make this an ideal chip family for many applications.