INA138NA/3KG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Current Shunt Monitor
• Characteristics: High accuracy, low offset voltage, wide common-mode range
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: Measures current flowing through a shunt resistor
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 2.7V to 36V
• Input Common-Mode Voltage Range: -0.3V to V+ + 0.3V
• Output Voltage Swing: 0V to V+
• Quiescent Current: 100µA
• Gain Bandwidth Product: 500kHz
• Offset Voltage: ±150µV
• Temperature Range: -40°C to +125°C

Pin Configuration

The INA138NA/3KG4 has the following pin configuration:

1. V-
2. V+
3. REF
4. OUT
5. NC (No Connection)
6. NC (No Connection)
7. GND
8. IN+

Functional Features

• Measures small differential voltages across a shunt resistor
• Provides a high-accuracy output voltage proportional to the measured current
• Wide common-mode voltage range allows for flexible applications
• Low offset voltage minimizes measurement errors
• High gain bandwidth product enables accurate measurements at high frequencies

Advantages

• High accuracy and precision in current measurement
• Wide supply voltage range allows for versatile use
• Small package size for space-constrained applications
• Low power consumption for energy-efficient designs
• Robust performance over a wide temperature range

Disadvantages

• Limited output voltage swing may restrict certain applications
• Non-standard pin configuration may require additional circuitry for compatibility
• Higher cost compared to some alternative models

Working Principles

The INA138NA/3KG4 operates based on the principle of measuring the voltage drop across a shunt resistor. It amplifies the small differential voltage across the shunt resistor and provides an output voltage proportional to the measured current. The device utilizes a precision amplifier with low offset voltage and high common-mode rejection ratio to ensure accurate measurements.

Application Field Plans

The INA138NA/3KG4 is commonly used in various applications, including:

1. Battery management systems
2. Power supply monitoring
3. Motor control systems
4. Current sensing in industrial equipment
5. Solar power systems
6. Automotive electronics

Alternative Models

Other alternative models that can be considered as alternatives to the INA138NA/3KG4 include:

1. INA139: Similar specifications and pin configuration, but with higher gain bandwidth product
2. INA137: Lower-cost option with slightly reduced accuracy and performance
3. MAX4080: Comparable performance with different package options
4. AD8211: Higher accuracy and wider temperature range, but with different pin configuration

Please note that the above list is not exhaustive, and there may be other suitable alternatives available in the market.

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