Overview
The INA240A1PW, 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 INA240A1PW operates over a wide common-mode voltage range from –4 V to 80 V, independent of the supply voltage, and is powered by a single 2.7-V to 5.5-V supply, drawing a maximum of 2.4 mA of supply current.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 2.7 to 5.5 | V |
| Common-Mode Range | –4 to 80 | V |
| Gain (INA240A1) | 20 | V/V |
| Gain Error | ±0.20% | % |
| Gain Drift | 2.5 ppm/°C | ppm/°C |
| Offset Voltage | ±25 µV | µV |
| Offset Drift | 250 nV/°C | nV/°C |
| Quiescent Current | 2.4 mA | mA |
| Operating Temperature Range | –40 to 125 | °C |
| Package Types | 8-pin TSSOP, 8-pin SOIC | |
| Bandwidth | 400 kHz (–3-dB bandwidth) | kHz |
| Common-Mode Rejection Ratio (CMRR) | 132 dB (DC), 93 dB (AC at 50 kHz) | dB |
Key Features
- Enhanced PWM Rejection: High levels of suppression for large common-mode transients associated with PWM signals, ensuring accurate current measurements without large transients and recovery ripple.
- Excellent CMRR: 132-dB DC CMRR and 93-dB AC CMRR at 50 kHz, providing high common-mode rejection.
- Wide Common-Mode Range: Operates from –4 V to 80 V, independent of the supply voltage.
- High Accuracy: Low gain error (±0.20%), low offset voltage (±25 µV), and low offset drift (250 nV/°C).
- Multiple Gain Options: Available gains include 20 V/V, 50 V/V, 100 V/V, and 200 V/V.
- Low Power Consumption: Maximum quiescent current of 2.4 mA.
- Extended Operating Temperature Range: Specified over –40°C to +125°C.
- Compact Packaging: Available in 8-pin TSSOP and 8-pin SOIC packages.
Applications
- Motor Controls: Ideal for motor drive systems that use PWM signals.
- Solenoid and Valve Controls: Accommodates the flyback period of solenoid applications.
- Power Management: Suitable for various power management systems requiring precise current sensing.
- Actuator Controls: Used in actuator control systems that require accurate current measurement.
- Pressure Regulators: Can be used in pressure regulation systems that need precise current sensing.
- Telecom Equipment: Applicable in telecom equipment for supply monitoring and current sensing.
Q & A
- What is the common-mode voltage range of the INA240A1PW?
The INA240A1PW operates over a common-mode voltage range from –4 V to 80 V.
- What are the available gain options for the INA240?
The available gains include 20 V/V, 50 V/V, 100 V/V, and 200 V/V.
- What is the maximum quiescent current of the INA240A1PW?
The maximum quiescent current is 2.4 mA.
- What is the operating temperature range of the INA240A1PW?
The device is specified over an operating temperature range of –40°C to +125°C.
- What are the package types available for the INA240A1PW?
The device is available in 8-pin TSSOP and 8-pin SOIC packages.
- What is the bandwidth of the INA240A1PW?
The bandwidth is 400 kHz (–3-dB bandwidth).
- How does the INA240A1PW handle PWM signals?
The device features enhanced PWM rejection, providing high levels of suppression for large common-mode transients associated with PWM signals.
- What is the common-mode rejection ratio (CMRR) of the INA240A1PW?
The CMRR is 132 dB (DC) and 93 dB (AC at 50 kHz).
- Can the INA240A1PW be used in solenoid control systems?
Yes, it is suitable for solenoid control systems, accommodating the flyback period of typical solenoid applications.
- What is the supply voltage range for the INA240A1PW?
The supply voltage range is from 2.7 V to 5.5 V.
