Overview
The INA240A2PWR is a high-performance, voltage-output, current-sense amplifier produced by Texas Instruments. This device is designed to sense current across shunt resistors over a wide common-mode voltage range from –4 V to 80 V, making it suitable for various applications including motor controls, solenoid and valve controls, power management, and more. The INA240A2PWR features enhanced pulse width modulation (PWM) rejection, which minimizes the impact of large common-mode transients associated with PWM signals, ensuring accurate current measurements. It operates from a single 2.7-V to 5.5-V power supply and is available in 8-pin TSSOP and SOIC packages.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 2.7 to 5.5 | V |
| Common-Mode Range | –4 to 80 | V |
| Gain (INA240A2) | 50 | V/V |
| Gain Error | ±0.20% | % |
| Offset Voltage | ±25 μV | μV |
| Offset Voltage Drift | ±250 nV/°C | nV/°C |
| Quiescent Current | 2.4 mA | mA |
| Bandwidth | 400 kHz | kHz |
| Operating Temperature Range | –40 to 125 | °C |
| Package Types | 8-pin TSSOP, 8-pin SOIC |
Key Features
- Enhanced PWM Rejection: Minimizes the effect of large common-mode transients associated with PWM signals, ensuring accurate current measurements.
- Wide Common-Mode Range: Operates over a range of –4 V to 80 V, independent of the supply voltage.
- High CMRR: Excellent common-mode rejection ratio (CMRR) of 132 dB DC and 93 dB AC at 50 kHz.
- Zero-Drift Topology: Low offset voltage and drift, enabling precise current sensing with minimal error.
- Multiple Gain Options: Available in four fixed gains: 20 V/V, 50 V/V, 100 V/V, and 200 V/V.
- Low Power Consumption: Operates from a single 2.7-V to 5.5-V power supply with a maximum quiescent current of 2.4 mA.
Applications
- Motor Controls: Suitable for motor drive systems that use PWM signals.
- Solenoid and Valve Controls: Ideal for applications requiring precise control over solenoids and valves.
- Power Management: Used in power management systems to monitor and control current flow.
- Actuator Controls: Applicable in actuator control systems that require accurate current sensing.
- Pressure Regulators: Can be used in pressure regulation systems to ensure precise control.
- Telecom Equipment: Suitable for use in telecom equipment for supply and current monitoring.
Q & A
- What is the common-mode voltage range of the INA240A2PWR?
The INA240A2PWR operates over a common-mode voltage range of –4 V to 80 V.
- What is the gain of the INA240A2PWR?
The gain of the INA240A2PWR is 50 V/V.
- What is the maximum quiescent current of the INA240A2PWR?
The maximum quiescent current is 2.4 mA.
- What is the bandwidth of the INA240A2PWR?
The bandwidth is 400 kHz.
- What are the available package types for the INA240A2PWR?
The device is available in 8-pin TSSOP and 8-pin SOIC packages.
- What is the operating temperature range of the INA240A2PWR?
The operating temperature range is –40°C to 125°C..
- How does the INA240A2PWR handle PWM signals?
The INA240A2PWR features enhanced PWM rejection, which minimizes the effect of large common-mode transients associated with PWM signals..
- What are the typical applications of the INA240A2PWR?
Typical applications include motor controls, solenoid and valve controls, power management, actuator controls, pressure regulators, and telecom equipment..
- What is the significance of the zero-drift topology in the INA240A2PWR?
The zero-drift topology ensures low offset voltage and drift, enabling precise current sensing with minimal error..
- How does the INA240A2PWR adjust its output voltage?
The output voltage can be adjusted using the reference pins, allowing for precise biasing of the output voltage..
