AD8468WBKSZ-R7 Integrated Circuits (ICs)

Linear - Comparators

The AD8468WBKSZ-R7 is a precision comparator from Analog Devices, Inc. It is a monolithic CMOS/BiCMOS integrated circuit with an open collector output stage suitable for interfacing to TTL or CMOS levels. The AD8468WBKSZ-R7 is designed for operation over a wide temperature range, from -40° to +125°C. It is part of the Micropower family of comparator products and draws 175 µA typical supply current.

The AD8468WBKSZ-R7 features a low propagation delay of 250 ns, a high speed voltage reference amplifier with a 1.45 V internal reference voltage, and an adjustable hysteresis level up to 1 V. Furthermore, this product is designed to have excellent rail-to-rail input operation, allowing it to compare signals even near the power supply rails.

Application Field

The AD8468WBKSZ-R7 is an ideal solution for applications requiring a fast voltage comparison with Hysteresis or differentiating applications. The wide temperature range makes it suitable for temperature measurements in industrial automation and embedded systems. The open collector output makes it suitable for N-channel MOSFET high side switch applications.

For example, the AD8468WBKSZ-R7 can be used to implement over-temperature protection systems commonly used in motors, processors, and other sensitive digital devices. It is also used in level detection and warning systems, battery-operated products, automatic test equipment, temperature and pressure monitoring systems, and 4-20mA current loop monitoring and control.

Working Principle

The working principle of the AD8468WBKSZ-R7 is based on a voltage comparison, with an input threshold level (Hysteresis) adjustable up to 1 V. When the voltage on the non-inverting input (V_IN1) rises above the voltage on the inverting input (V_IN2) plus the Hysteresis voltage, V_REF2, the output will switch to the high state (V_OUT = V_DD). Conversely, when the voltage on the non-inverting input falls below the voltage on the inverting input minus the Hysteresis voltage, V_REF2, the output will switch low (V_OUT = 0 V).

The AD8468WBKSZ-R7 features rail-to-rail operation, allowing it to compare signals even near the power supply rails. The inputs can be driven from a supply voltage from 1.7 V to 5.5 V and the output can go to 2.3 V below the negative supply rail or to 1.4 V above the positive supply rail.

In addition, it has one programmable reference input (V_REF1) which can be used with the optional internal reference voltage (V_REF2) to create an adjustable threshold voltage in the range of 0 to 1.45 V. This is useful for applications requiring a comparison of two different input voltages.

The AD8468WBKSZ-R7 has a power-off protection feature that allows it to remain in the last state before power down and also an output enable pin that allows the output to be forced in the high or low state regardless of the input signals.

Overall, the AD8468WBKSZ-R7 is a versatile linear comparator ideal for a wide range of applications.