Overview
The INA253A1IPWR, produced by Texas Instruments, is a high-performance, voltage-output, current sense amplifier designed for precise bidirectional current measurement. It features an integrated 2 mΩ shunt resistor and is optimized for applications requiring high accuracy and stability over a wide temperature range. The device operates from a single 2.7-V to 5.5-V power supply and is available in a 20-pin TSSOP package. The INA253A1IPWR is particularly suited for industrial and automotive applications where reliable and accurate current sensing is critical.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Shunt Resistor | 2 | mΩ |
| Shunt Resistor Tolerance | 0.1% | Max |
| Continuous Current Range | ±15 A | -40°C to +85°C |
| Gain | 100 mV/A (INA253A1) | |
| 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 | |
| Bandwidth | 350 kHz (-3 dB) | |
| Output Settling Time | 10 µs | |
| Slew Rate | 2.4 V/µs | |
| Voltage Noise Density | 40 nV/√Hz |
Key Features
- Integrated Shunt Resistor: A precise 2 mΩ shunt resistor with low drift over temperature.
- High Accuracy: Zero-drift chopped amplifier providing high measurement accuracy and low temperature drift.
- Enhanced PWM Rejection: Reduces the effect of common-mode transients associated with PWM signals.
- Wide Common-Mode Range: Operates over a common-mode range of -4 V to +80 V, independent of the supply voltage.
- Multiple Gain Options: Available gains of 100 mV/A, 200 mV/A, and 400 mV/A for optimizing output voltage based on the target current range.
- High CMRR: Excellent common-mode rejection ratio (CMRR) of >120 dB DC and 90 dB AC at 50 kHz.
- Low Quiescent Current: Maximum quiescent current of 2.4 mA.
- Wide Operating Temperature Range: Specified over -40°C to +125°C.
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 control applications requiring high accuracy and stability.
- Actuator Controls: Ideal for actuator control systems where precise current measurement is critical.
- DC/DC Converters: Used in DC/DC converter applications for monitoring current.
- Remote I/O Link Control: Applicable in remote I/O link control systems for reliable current sensing.
Q & A
- What is the shunt resistor value of the INA253A1IPWR?
The shunt resistor value is 2 mΩ with a tolerance of 0.1% (Max).
- What are the available gain options for the INA253?
The INA253 is available with gains of 100 mV/A, 200 mV/A, and 400 mV/A.
- What is the common-mode range of the INA253A1IPWR?
The common-mode range is from -4 V to +80 V.
- What is the maximum continuous current the INA253 can handle?
The device can handle ±15 A continuously from -40°C to +85°C.
- What is the operating voltage range of the INA253A1IPWR?
The operating voltage range is from 2.7 V to 5.5 V.
- What is the bandwidth of the INA253A1IPWR?
The bandwidth is 350 kHz (-3 dB).
- What is the quiescent current of the INA253A1IPWR?
The maximum quiescent current is 2.4 mA.
- What are some typical applications of the INA253A1IPWR?
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 INA253A1IPWR handle PWM rejection?
The device features enhanced PWM rejection circuitry to suppress large (dv/dt) signals, enabling real-time continuous current measurements.
- What is the package type of the INA253A1IPWR?
The device is available in a 20-pin TSSOP package.
