Overview
The INA240A4PWR is a high-precision current sense amplifier manufactured by Texas Instruments. Designed for applications requiring accurate current measurement, this device is part of the INA240 series, known for its enhanced PWM rejection and wide common-mode voltage range. It is particularly suited for systems such as motor drives and solenoid controls, where precise current sensing is critical. The INA240A4PWR operates on a single power supply ranging from 2.7V to 5.5V and features a low offset voltage, making it ideal for low-side current sensing applications. Its compact TSSOP-8 package and extended temperature range (-40°C to +125°C) ensure reliability in harsh environments.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Manufacturer | Texas Instruments | - | - |
| Product Category | Current Sense Amplifier | - | - |
| Channels | 1 | Channel | - |
| Gain Bandwidth Product | 100 | kHz | - |
| Common-Mode Voltage Range | -4 to +80 | V | - |
| Common-Mode Rejection Ratio (CMRR) | 132 | dB | DC CMRR |
| Input Bias Current | 90 | µA | - |
| Input Offset Voltage | 5 | µV | - |
| Supply Voltage (Max) | 5.5 | V | - |
| Supply Voltage (Min) | 2.7 | V | - |
| Operating Supply Current | 2.4 | mA | - |
| Gain Error | 0.05 | % | - |
| Operating Temperature Range | -40 to +125 | °C | - |
| Package | TSSOP-8 | - | - |
| 3dB Bandwidth | 400 | kHz | - |
| Accuracy | 0.02 | % | - |
| Output Type | Voltage | - | - |
| Slew Rate | 2 | V/µs | - |
| Features | Bi-directional, Enhanced PWM Rejection, Low-side Capable | - | - |
Key Features
- Enhanced PWM rejection for accurate current measurement in systems with large common-mode transients.
- Wide common-mode voltage range (-4V to +80V) enables operation in diverse applications.
- Low offset voltage (5µV) ensures precise current sensing even at low levels.
- Single-supply operation (2.7V to 5.5V) simplifies power management.
- Extended temperature range (-40°C to +125°C) for reliable performance in harsh environments.
- Compact TSSOP-8 package suitable for space-constrained designs.
Applications
The INA240A4PWR is widely used in applications requiring precise current measurement and monitoring. Key application areas include motor control systems, where it ensures accurate current feedback for efficient motor operation. It is also employed in solenoid control systems, battery management systems, and power supplies, where its enhanced PWM rejection and wide common-mode range provide reliable performance. Additionally, its low-side current sensing capability makes it suitable for industrial automation and robotics, ensuring accurate current detection in complex systems.
Q & A
1. What is the operating voltage range of the INA240A4PWR?
The INA240A4PWR operates on a single power supply ranging from 2.7V to 5.5V.
2. What is the common-mode voltage range of this device?
The common-mode voltage range is -4V to +80V, allowing operation in a wide variety of applications.
3. Does the INA240A4PWR support bidirectional current sensing?
Yes, it supports bidirectional current sensing, making it versatile for different current measurement scenarios.
4. What is the gain bandwidth product of the INA240A4PWR?
The gain bandwidth product is 100 kHz.
5. What is the typical input offset voltage?
The typical input offset voltage is 5 µV, ensuring high precision in current measurement.
6. Is the INA240A4PWR suitable for high-temperature environments?
Yes, it has an extended operating temperature range of -40°C to +125°C, making it suitable for harsh environments.
7. What package does the INA240A4PWR come in?
It is available in a compact TSSOP-8 package.
8. Does this device feature enhanced PWM rejection?
Yes, it features enhanced PWM rejection, which is ideal for systems with large common-mode transients.
9. What is the typical supply current?
The typical supply current is 2.4 mA.
10. Can the INA240A4PWR be used in low-side current sensing applications?
Yes, it is capable of low-side current sensing, making it suitable for a variety of configurations.
