Overview
The INA253A3IPWR, produced by Texas Instruments, is a high-performance, voltage-output, current sense amplifier designed for precise bidirectional current measurement. This device integrates a 2-mΩ precision shunt resistor and a zero-drift chopped amplifier, providing high accuracy and low temperature drift. It operates over a wide common-mode range from –4 V to +80 V, independent of the supply voltage, and is available in three fixed gains: 100 mV/A, 200 mV/A, and 400 mV/A (the INA253A3IPWR specifically offers a gain of 400 mV/A). The INA253A3IPWR is optimized for applications requiring real-time continuous current measurements, particularly in motor-drive and solenoid valve control scenarios.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Shunt Resistor | 2 mΩ | |
| Shunt Inductance | 3 nH | |
| Shunt Resistor Tolerance | 0.1% (Max) | |
| Continuous Current Range | ±15 A (–40°C to +85°C) | |
| Gain | 400 mV/A (INA253A3IPWR) | |
| Gain Error | 0.4% (Max) | |
| Gain Drift | 45 ppm/°C (Max) | |
| Offset Current | ±15 mA (Max) | |
| Offset Drift | 125 µA/°C (Max) | |
| Common-Mode Range | –4 V to +80 V | |
| Quiescent Current | 2.4 mA (Max) | |
| Operating Voltage Range | 2.7 V to 5.5 V | |
| Operating Temperature Range | –40°C to +125°C | |
| Package | 20-pin TSSOP |
Key Features
- Integrated Shunt Resistor: A precise, 2-mΩ current-sensing resistor with low drift over temperature.
- Zero-Drift Amplifier: Utilizes a zero-drift chopped amplifier for high accuracy and minimal temperature drift.
- Enhanced PWM Rejection: Designed to suppress large (dv/dt) signals, enabling real-time continuous current measurements.
- High Common-Mode Rejection Ratio (CMRR): > 120-dB DC CMRR and 90-dB AC CMRR at 50 kHz.
- Wide Common-Mode Range: Operates from –4 V to +80 V, independent of the supply voltage.
- Multiple Gain Options: Available in gains of 100 mV/A, 200 mV/A, and 400 mV/A.
- Low Quiescent Current: Maximum of 2.4 mA.
- High Bandwidth: –3-dB bandwidth of 350 kHz and fast slew rate of 2.4 V/µs.
Applications
- Solenoid and Valve Controls: Precise current measurement for solenoid and valve control applications.
- Transmission Control: Used in transmission control systems for accurate current sensing.
- Motor Controls: Suitable for motor drive applications requiring real-time current measurements.
- Actuator Controls: Ideal for actuator control systems where precise current monitoring is essential.
- DC/DC Converters: Used in DC/DC converter applications for current sensing and monitoring.
- Remote I/O Link Control: Applicable in remote I/O link control systems for accurate current measurement.
Q & A
- What is the shunt resistor value of the INA253A3IPWR?
The shunt resistor value is 2 mΩ.
- What are the available gain options for the INA253 series?
The INA253 series is available in gains of 100 mV/A, 200 mV/A, and 400 mV/A.
- What is the common-mode range of the INA253A3IPWR?
The common-mode range is from –4 V to +80 V.
- What is the maximum continuous current the INA253A3IPWR can handle?
The maximum continuous current is ±15 A from –40°C to +85°C.
- What is the operating voltage range of the INA253A3IPWR?
The operating voltage range is 2.7 V to 5.5 V.
- What is the package type of the INA253A3IPWR?
The package type is a 20-pin TSSOP.
- What is the quiescent current of the INA253A3IPWR?
The quiescent current is a maximum of 2.4 mA.
- What is the bandwidth of the INA253A3IPWR?
The –3-dB bandwidth is 350 kHz.
- What are some typical applications of the INA253A3IPWR?
Typical applications include solenoid and valve controls, transmission control, motor controls, actuator controls, DC/DC converters, and remote I/O link control.
- How does the INA253A3IPWR handle PWM signals?
The INA253A3IPWR features enhanced PWM rejection circuitry to suppress large (dv/dt) signals, enabling real-time continuous current measurements.
