MAX9923HEUB+T

Product Overview

Category

The MAX9923HEUB+T belongs to the category of integrated circuits (ICs).

Use

This IC is primarily used for automotive applications, specifically in the field of sensor interfaces.

Characteristics

• The MAX9923HEUB+T is a high-side current-sense amplifier with an integrated comparator.
• It operates over a wide voltage range, making it suitable for various automotive systems.
• This IC offers precise current sensing and monitoring capabilities.
• It features a low offset voltage and low quiescent current, ensuring accurate measurements.
• The device is designed to withstand harsh automotive environments, with high ESD protection and robustness against electrical transients.

Package

The MAX9923HEUB+T is available in a small 10-pin µMAX package, which is compact and space-saving.

Essence

The essence of the MAX9923HEUB+T lies in its ability to accurately sense and monitor current in automotive applications, providing crucial information for system control and diagnostics.

Packaging/Quantity

This IC is typically sold in reels or tubes, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 4.5V to 28V
• Operating Temperature Range: -40°C to +125°C
• Quiescent Current: 50µA (typical)
• Input Offset Voltage: 100µV (maximum)
• Output Voltage Swing: 0V to VCC - 1.2V
• Response Time: 1µs (typical)

Detailed Pin Configuration

The MAX9923HEUB+T has the following pin configuration:

1. IN+
2. IN-
3. REF
4. GND
5. OUT
6. VCC
7. FLT
8. EN
9. SET
10. NC

Functional Features

• High-side current sensing: The MAX9923HEUB+T allows accurate measurement of current flowing through a load connected to the high side of the power supply.
• Integrated comparator: The IC includes a built-in comparator, enabling threshold-based monitoring and control based on the sensed current.
• Fault detection: The FLT pin provides an indication of fault conditions, such as overcurrent or short circuit events.
• Enable/disable control: The EN pin allows the device to be easily enabled or disabled, conserving power when not in use.
• Adjustable gain: The SET pin enables the user to adjust the gain of the current-sense amplifier, providing flexibility for different applications.

Advantages and Disadvantages

Advantages

• Accurate current sensing for automotive applications
• Wide operating voltage range
• Low offset voltage and quiescent current
• Robustness against harsh automotive environments
• Compact package size

Disadvantages

• Limited pin configuration options
• Not suitable for low-voltage applications

Working Principles

The MAX9923HEUB+T operates by measuring the voltage drop across a sense resistor connected in series with the load. This voltage is amplified by the internal current-sense amplifier and compared to a reference voltage. The integrated comparator then generates an output signal based on the comparison result. The device can be configured to detect fault conditions and provide appropriate indications.

Detailed Application Field Plans

The MAX9923HEUB+T finds extensive application in various automotive systems, including:

1. Electric power steering: The IC can monitor the current drawn by the steering motor, enabling precise control and fault detection.
2. Battery management systems: It allows accurate measurement of charging and discharging currents, aiding in battery health monitoring and protection.
3. Motor control: The MAX9923HEUB+T can be used to sense and monitor the current in motor control circuits, ensuring efficient and safe operation.
4. Lighting systems: It enables current monitoring in automotive lighting systems, facilitating adaptive lighting control and fault detection.

Detailed and Complete Alternative Models

1. MAX9921HEUB+T: Similar to the MAX9923HEUB+T, but without the integrated comparator.
2. MAX9925HEUB+T: A higher precision version of the MAX9923HEUB+T, with lower offset voltage and higher accuracy.
3. MAX9927HEUB+T: Offers additional features such as adjustable gain and temperature compensation.

These alternative models provide options with varying specifications and functionalities, allowing users to choose the most suitable IC for their specific requirements.

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