INA203AID

Product Overview

Category: Integrated Circuit (IC)

Use: Current Shunt Monitor

Characteristics: - High accuracy current sensing - Wide common-mode voltage range - Low offset voltage and drift - Small package size for space-constrained applications

Package: SOIC (Small Outline Integrated Circuit)

Essence: The INA203AID is a high-precision current shunt monitor IC designed for accurate current measurement in various applications.

Packaging/Quantity: The INA203AID is available in a standard SOIC package. It is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.7V to 26V
• Common-Mode Voltage Range: -0.3V to +26V
• Input Offset Voltage: ±150µV (maximum)
• Gain Error: ±0.5% (maximum)
• Bandwidth: 500kHz (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The INA203AID has a total of 8 pins, which are assigned specific functions as follows:

1. V+ (Positive Power Supply)
2. V- (Negative Power Supply)
3. REF (Reference Voltage)
4. OUT (Output Voltage)
5. IN- (Inverting Input)
6. IN+ (Non-Inverting Input)
7. SET (Gain Setting)
8. NC (No Connection)

Functional Features

• High Accuracy: The INA203AID provides precise current sensing with low offset voltage and drift, ensuring accurate measurements.
• Wide Common-Mode Voltage Range: It can handle a wide range of common-mode voltages, making it suitable for diverse applications.
• Small Package Size: The compact SOIC package allows for easy integration into space-constrained designs.

Advantages and Disadvantages

Advantages: - High accuracy current sensing - Wide common-mode voltage range - Low offset voltage and drift - Compact package size

Disadvantages: - Limited maximum supply voltage range (up to 26V) - Requires external gain-setting resistor for precise measurements

Working Principles

The INA203AID operates based on the principle of measuring the voltage drop across a shunt resistor to determine the current flowing through it. It amplifies this voltage drop and provides an output voltage proportional to the measured current. By adjusting the gain-setting resistor, the user can calibrate the output voltage to match the desired current range.

Detailed Application Field Plans

The INA203AID is commonly used in various applications that require accurate current measurement, such as:

1. Power Management Systems: Monitoring current consumption in power supplies, battery chargers, and DC-DC converters.
2. Motor Control: Current monitoring in motor drives and control systems.
3. Industrial Automation: Current sensing in industrial equipment and machinery.
4. Automotive Electronics: Current measurement in automotive systems, including electric vehicles and hybrid vehicles.
5. Renewable Energy Systems: Monitoring current flow in solar panels, wind turbines, and energy storage systems.

Detailed and Complete Alternative Models

1. INA202AID: Similar to INA203AID but with lower bandwidth (250kHz typical).
2. INA204AID: Higher precision version with lower offset voltage (±75µV maximum).
3. INA205AID: Higher gain version with adjustable gain setting.

These alternative models offer different specifications and features to cater to specific application requirements.

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