AD8611ARMZ-REEL

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Comparators - AD8611ARMZ-REEL

The AD8611ARMZ-REEL is a low power, rail-to-rail, low power, precision CMOS differential amplifier with an integrated CMOS level shift output stage. It is an excellent device for converting signal levels between high and low voltage systems, especially in smart phones and microcontrollers. The AD8611ARMZ-REEL provides rail-to-rail input swing, low quiescent current consumption of 1.9 μA (typical), and a high slewing rate of 100 V/μs (typical). It offers outstanding on-chip ESD protection.

Application Field

The AD8611ARMZ-REEL has several uses for linear applications. It provides rail-to-rail input and output capability, allowing for level translation in applications from high voltage to low voltage, and vice versa. The low power consumption, low quiescent current, and high slew rate of the device make it ideal for low power applications, such as smart phones and handheld gaming devices. The differential amplifier can also be used as a voltage amplifier, current amplifier, or gain amplifier for circuit design, as well as for power management and voltage conversion.

The AD8611ARMZ-REEL can also be used as a comparator in applications such as motor control, speech recognition, and data acquisition systems. It can be used in a comparator configuration with a single input connected to a reference voltage, and the other input connected to a signal of interest. The output of the comparator can be used to provide an accurate comparison between the two voltage signals. In addition, the device can also be used in a crowbar circuit to provide over-voltage protection.

Working Principle

The AD8611ARMZ-REEL is a differential amplifier with an integrated CMOS level shift output stage. The differential amplifier consists of two input amplifier cells connected in parallel, and a single output amplifier cell. The output amplifier provides a rail-to-rail output swing by providing an output gain of 5x in the positive swing and 10x in the negative swing. The output stage also features a level shifter, which facilitates level translation between high and low voltage systems.

When used as a comparator, the circuit takes the voltage at the non-inverting input as the reference voltage and compares it to the input of the inverting input. When the voltage of the inverting input exceeds the reference voltage, the output of the amplifier goes low. Conversely, when the voltage of the inverting input is lower than the reference voltage, the output of the amplifier goes high. This can be used for simple voltage comparison applications.

The AD8611ARMZ-REEL also has excellent on-chip ESD protection, allowing it to withstand voltage transients up to 8000 V. This is especially useful for portable devices or applications in harsh or rugged environments, where electrical surges may be common. The device also has a wide operating temperature range of –40 °C to +125 °C, making it suitable for a variety of applications.

Conclusion

The AD8611ARMZ-REEL is a low power, rail-to-rail, and high slew rate CMOS differential amplifier with an integrated CMOS level shift output stage. It is an excellent device for level translation between high and low voltage systems, and has a wide operating temperature range and excellent on-chip ESD protection. When used as a comparator, the AD8611ARMZ-REEL provides a rail-to-rail output swing, making it ideal for applications from motor control to power management and voltage conversion.

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