INA194AIDBVRG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Current Shunt Monitor
• Characteristics: High accuracy, low offset voltage, wide common-mode voltage range
• Package: SOT-23-5
• Essence: Monitors current flowing through a shunt resistor
• Packaging/Quantity: Tape and Reel, 3000 pieces per reel

Specifications

• Supply Voltage Range: 2.7V to 26V
• Input Common-Mode Voltage Range: -0.3V to +26V
• Output Voltage Swing: 0V to Vcc - 1.2V
• Quiescent Current: 60µA (typical)
• Gain Error: ±0.5% (maximum)
• Offset Voltage: ±100µV (maximum)
• Bandwidth: 500kHz (typical)

Detailed Pin Configuration

The INA194AIDBVRG4 has a total of 5 pins:

1. Pin 1: SHDN (Shutdown) - Active-low shutdown pin
2. Pin 2: IN- (Negative Input) - Inverting input for the current sense signal
3. Pin 3: IN+ (Positive Input) - Non-inverting input for the current sense signal
4. Pin 4: Vout (Output) - Output voltage proportional to the sensed current
5. Pin 5: Vcc (Supply Voltage) - Positive supply voltage

Functional Features

• High accuracy current sensing
• Wide common-mode voltage range allows monitoring of high-side and low-side currents
• Low offset voltage minimizes measurement errors
• Rail-to-rail output swing enables accurate measurements near the supply rails
• Shutdown mode for power-saving applications

Advantages and Disadvantages

Advantages

• High accuracy current monitoring
• Wide common-mode voltage range
• Low offset voltage for precise measurements
• Small package size for space-constrained applications
• Shutdown mode for power-saving

Disadvantages

• Limited output voltage swing compared to some other models
• Higher quiescent current compared to some low-power alternatives

Working Principles

The INA194AIDBVRG4 is designed to monitor the current flowing through a shunt resistor. It utilizes a precision operational amplifier to amplify the voltage across the shunt resistor and provide an output voltage proportional to the sensed current. The device operates in a wide common-mode voltage range, allowing it to monitor both high-side and low-side currents accurately.

Detailed Application Field Plans

The INA194AIDBVRG4 finds applications in various fields, including:

1. Battery Management Systems: Monitoring current in battery charging and discharging circuits.
2. Power Supplies: Current sensing in DC-DC converters, linear regulators, and switch-mode power supplies.
3. Motor Control: Current monitoring in motor control circuits for precise control and protection.
4. Industrial Automation: Current sensing in industrial equipment and machinery for fault detection and control.
5. Automotive Electronics: Current monitoring in automotive systems such as electric vehicles, hybrid vehicles, and engine control units.

Detailed and Complete Alternative Models

1. INA193AIDBVRG4: Similar specifications but with a lower supply voltage range (2.7V to 18V).
2. INA195AIDBVRG4: Similar specifications but with a higher gain error (±1% maximum).
3. INA196AIDBVRG4: Similar specifications but with a higher bandwidth (1MHz typical).

(Note: These alternative models are from the same INA19x family and have similar pin configurations and package types.)

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