Overview
The INA240A4DR, produced by Texas Instruments, is a high-performance, voltage-output, current-sense amplifier designed for precise current measurement across a wide range of applications. This device features enhanced pulse width modulation (PWM) rejection, making it ideal for systems that use PWM signals, such as motor drives and solenoid control systems. The INA240A4DR operates with a single 2.7-V to 5.5-V power supply and is available in an 8-pin TSSOP and 8-pin SOIC packages. It boasts a zero-drift topology, ensuring high accuracy and minimal offset voltage, and supports both high-side and low-side current sensing.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 2.7 to 5.5 | V |
| Common-Mode Range | -4 to 80 | V |
| Gain | 200 V/V | |
| Gain Error | ±0.20% | |
| Offset Voltage | ±25 μV | |
| Offset Drift | ±250 nV/°C | |
| Quiescent Current | 2.4 mA | |
| Bandwidth | 400 kHz | |
| Operating Temperature Range | -40°C to 125°C | |
| Package | 8-pin TSSOP, 8-pin SOIC |
Key Features
- Enhanced PWM Rejection: High levels of suppression for large common-mode transients associated with PWM signals.
- Wide Common-Mode Range: Operates from -4 V to 80 V, independent of the supply voltage.
- Zero-Drift Topology: Ensures high accuracy with minimal offset voltage and drift.
- Excellent CMRR: 132 dB DC CMRR and 93 dB AC CMRR at 50 kHz.
- Multiple Gain Options: Available in gains of 20 V/V, 50 V/V, 100 V/V, and 200 V/V.
- Low Power Consumption: Maximum quiescent current of 2.4 mA.
- High Bandwidth: 400 kHz bandwidth for fast response and accurate current measurements.
Applications
- Motor Controls: Suitable for motor drive systems that use PWM signals.
- Solenoid and Valve Controls: Ideal for solenoid applications due to its ability to operate below ground during the flyback period.
- Power Management: Used in power management systems to monitor current accurately.
- Actuator Controls: Applicable in actuator control systems requiring precise current sensing.
- Pressure Regulators: Can be used in pressure regulator systems for accurate current measurement.
- Telecom Equipment: Suitable for telecom equipment supply monitoring.
Q & A
- What is the operating voltage range of the INA240A4DR?
The INA240A4DR operates from a single 2.7-V to 5.5-V power supply.
- What is the common-mode range of the INA240A4DR?
The device operates over a wide common-mode range from -4 V to 80 V.
- What are the available gain options for the INA240?
The INA240 is available in gains of 20 V/V, 50 V/V, 100 V/V, and 200 V/V.
- What is the maximum quiescent current of the INA240A4DR?
The maximum quiescent current is 2.4 mA.
- What is the bandwidth of the INA240A4DR?
The bandwidth is 400 kHz.
- What is the operating temperature range of the INA240A4DR?
The device operates over a temperature range of -40°C to 125°C.
- What packages is the INA240A4DR available in?
The device is available in 8-pin TSSOP and 8-pin SOIC packages.
- What is the significance of the enhanced PWM rejection feature?
The enhanced PWM rejection feature reduces the effect of large common-mode transients associated with PWM signals, ensuring accurate current measurements.
- How does the zero-drift topology benefit the INA240A4DR?
The zero-drift topology ensures high accuracy with minimal offset voltage and drift, making it suitable for precise current sensing applications.
- What are some typical applications of the INA240A4DR?
Typical applications include motor controls, solenoid and valve controls, power management, actuator controls, pressure regulators, and telecom equipment supply monitoring.
