INA138NA/3K

Product Overview

• Category: Integrated Circuit
• Use: Current Shunt Monitor
• Characteristics: High Accuracy, Low Offset Voltage, Wide Common-Mode Range
• Package: 8-Pin SOIC
• Essence: Precision Current Measurement
• Packaging/Quantity: Tape and Reel, 3000 pieces per reel

Specifications

• Supply Voltage: 2.7V to 36V
• Input Offset Voltage: ±150µV (maximum)
• Input Bias Current: ±100nA (maximum)
• Common-Mode Rejection Ratio: 80dB (minimum)
• Bandwidth: 500kHz (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The INA138NA/3K has the following pin configuration:

1. V+
2. V-
3. REF
4. OUT
5. NC
6. NC
7. GND
8. SHDN

Functional Features

• High accuracy current sensing
• Low offset voltage for precise measurements
• Wide common-mode range allows for versatile applications
• Shutdown mode for power-saving operation
• Internal reference voltage for simplified circuit design

Advantages and Disadvantages

Advantages

• High precision current measurement
• Wide operating voltage range
• Low power consumption
• Compact package size
• Shutdown mode for power-saving

Disadvantages

• Limited bandwidth compared to some alternatives
• Requires external components for proper operation

Working Principles

The INA138NA/3K is a current shunt monitor that utilizes a precision amplifier to measure small voltage drops across a shunt resistor. It amplifies this voltage drop and provides an output proportional to the current flowing through the shunt resistor. The device incorporates a low-offset voltage amplifier and a high-precision internal reference to achieve accurate current measurements.

Detailed Application Field Plans

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

1. Battery management systems
2. Power supply monitoring
3. Motor control
4. Current sensing in industrial equipment
5. Overcurrent protection circuits
6. Energy monitoring systems

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the INA138NA/3K are:

1. INA139: Similar specifications with a different package (8-Pin DIP)
2. INA169: Lower cost option with slightly reduced accuracy
3. MAX4080: Higher bandwidth option for faster current sensing applications
4. AD8210: High-side current shunt monitor with integrated current sense amplifier

These alternative models offer similar functionality and can be chosen based on specific application requirements.

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