MAX921CPA

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Introduction

MAX921CPA is a single operational amplifier and comparator circuit in surface-mount packaging, built into a 8-pin dual-in-line package (DIP). It belongs to a family of linear-comparator circuits and works in tandem to signal differences in signals, voltages, and currents. MAX921CPA is used in a variety of applications, including temperature sensing, automotive engine control systems, process control and security systems.

Operation Principle

MAX921CPA employs a fixed-gain feedback amplifier to compare signals, voltages and currents. It features an internal voltage reference that sets the fixed gain and can be used to reduce any errors caused by temperature fluctuations, power supply fluctuations or manufacturing defects. The MAX921CPA comparator consists of an amplifier, an input buffer, a reference source, and intermediate circuits that control its operation. An input voltage applied to the comparator’s inverting input is compared to the reference voltage in order to determine whether the signal voltage is higher or lower than the reference voltage. The MAX921CPA can work at low-noise ranges and provides a low-power solution.

Features

• Wide operating voltage range: 1.8 - 5.5V
• 36mA output current
• Internal voltage reference
• Tight gain accuracy
• Low input bias current and low power dissipation
• Small size: 8-pin DIP

Applications

MAX921CPA is especially suitable for temperature sensing applications which require high accuracy measurement and fast response time, as well as for automotive engine control systems. It is also used in process control and security systems, where fast and reliable detection of temperature and other parameters is needed.

Conclusion

The MAX921CPA is a single operational amplifier and comparator circuit in surface-mount packaging. It belongs to a family of linear-comparator circuits and uses a fixed-gain feedback amplifier to compare input signals. The MAX921CPA is a compact, low-noise solution, capable of operating at a wide voltage range and providing accurate output. It is suitable for a range of applications such as temperature sensing, automotive engine control systems and process control.

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