AD8418BRMZ

Product Overview

Category

AD8418BRMZ belongs to the category of integrated circuit (IC) amplifiers.

Use

The AD8418BRMZ is primarily used as a high-voltage, high-precision current sense amplifier.

Characteristics

• High voltage operation: The AD8418BRMZ can operate at voltages up to ±500V.
• High precision: It provides accurate current measurements with a maximum gain error of only 0.5%.
• Low power consumption: The amplifier consumes minimal power, making it suitable for low-power applications.
• Small package size: The AD8418BRMZ comes in a compact MSOP package, allowing for space-efficient designs.
• Wide temperature range: It operates reliably over a wide temperature range from -40°C to +125°C.

Package and Quantity

The AD8418BRMZ is available in a 10-lead MSOP package. It is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: ±4 V to ±500 V
• Gain Error: 0.5% (maximum)
• Input Offset Voltage: 100 µV (maximum)
• Bandwidth: 200 kHz
• Quiescent Current: 1.2 mA (typical)

Pin Configuration

The AD8418BRMZ has the following pin configuration:

```

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| | --| V- IN+ |-- Pin 1 --| V+ OUT |-- Pin 2 --| GND NC |-- Pin 3 --| VREF NC |-- Pin 4 --| SENSE NC |-- Pin 5 --| GND NC |-- Pin 6 --| V+ OUT |-- Pin 7 --| V- IN- |-- Pin 8 --| GND NC |-- Pin 9 --| VREF NC |-- Pin 10 |_______________| ```

Functional Features

The AD8418BRMZ offers the following functional features:

1. High-Voltage Operation: The amplifier can handle high voltages up to ±500V, making it suitable for applications requiring high voltage sensing.
2. Current Sensing: It accurately measures current with a maximum gain error of only 0.5%, enabling precise current monitoring.
3. Low Power Consumption: The amplifier consumes minimal power, making it ideal for low-power applications where energy efficiency is crucial.
4. Wide Temperature Range: It operates reliably over a wide temperature range from -40°C to +125°C, ensuring performance in various environmental conditions.

Advantages and Disadvantages

Advantages

• High-voltage operation capability
• Accurate current measurements
• Low power consumption
• Compact package size
• Wide temperature range operation

Disadvantages

• Limited bandwidth (200 kHz)
• Higher cost compared to some alternative models

Working Principles

The AD8418BRMZ operates based on the principle of amplifying the voltage drop across a sense resistor to accurately measure current. It utilizes a precision amplifier with a high common-mode voltage range to handle high-voltage applications. The amplifier's gain and offset are carefully calibrated to ensure accurate current sensing.

Application Field Plans

The AD8418BRMZ finds applications in various fields, including:

1. Industrial Automation: It is used for current sensing in motor control systems, power supplies, and industrial equipment.
2. Energy Management: The amplifier enables precise current monitoring in energy meters, solar inverters, and battery management systems.
3. Automotive Electronics: It is utilized in electric vehicle charging stations, battery monitoring systems, and automotive powertrain applications.
4. Power Distribution: The AD8418BRMZ is employed in power distribution systems to monitor current flow and ensure efficient power management.

Alternative Models

Some alternative models that offer similar functionality to the AD8418BRMZ include:

1. INA240A1: This amplifier provides high-precision current sensing with a wide supply voltage range.
2. LTC6101: It offers high common-mode voltage range and low offset for accurate current measurements.
3. MAX4080: This amplifier features a high bandwidth and low input offset voltage, suitable for high-speed current sensing applications.

These alternative models can be considered based on specific application requirements and cost considerations.

In conclusion, the AD8418BRMZ is a high-voltage, high-precision current sense amplifier that offers accurate current measurements in various applications. Its compact size, low power consumption, and wide temperature range operation make it a versatile choice for current sensing needs.