The Texas Instruments INA240A1QPWRQ1 is a high-precision, automotive-qualified bidirectional current sense amplifier designed for accurate shunt-based current measurement in systems with large PWM common-mode transients.
The INA240A1-Q1 version provides a fixed voltage gain of 20V/V and supports a wide -4V to 80V common-mode voltage range, independent of its supply voltage. The negative common-mode capability enables reliable current sensing during flyback conditions commonly found in motors, solenoids and other inductive loads.
Enhanced PWM rejection significantly suppresses large common-mode voltage transitions found in PWM-controlled systems. This helps minimize output disturbances and recovery ripple, enabling more accurate in-line phase-current measurements in motor-control and switching applications.
The device offers high measurement precision with a maximum input offset voltage of ±25µV, maximum gain error of 0.2%, and gain-error drift of up to 2.5ppm/°C. It also provides excellent common-mode rejection, including approximately 132dB DC CMRR, together with a 400kHz bandwidth.
INA240A1QPWRQ1 operates from a single 2.7V to 5.5V supply and supports bidirectional current measurement through its reference input, making it suitable for systems where current can flow in either direction.
The device is AEC-Q100 qualified for automotive applications and is Functional Safety-Capable, providing supporting documentation for functional-safety system development.
The specific INA240A1QPWRQ1 ordering code is supplied in an 8-pin TSSOP (PW) package with an operating temperature range of -40°C to +125°C and tape-and-reel packaging for automated SMT assembly.
Key Features
- Manufacturer: Texas Instruments / TI
- Part Number: INA240A1QPWRQ1
- Product Type: Current Sense Amplifier
- Qualification: AEC-Q100 Automotive
- Current Measurement: Bidirectional
- Voltage Gain: 20V/V
- Common-Mode Voltage Range: -4V to 80V
- Supply Voltage: 2.7V to 5.5V
- Bandwidth: 400kHz
- Maximum Input Offset Voltage: ±25µV
- Maximum Gain Error: 0.2%
- Maximum Gain Error Drift: 2.5ppm/°C
- DC CMRR: 132dB
- Enhanced PWM Rejection
- Low-Side and In-Line Current Sensing
- Zero-Drift Architecture
- Reference Input for Bidirectional Measurement
- Functional Safety-Capable
- Number of Channels: 1
- Package: TSSOP-8
- Package Code: PW
- Package Size: Approx. 3 × 6.4mm
- Operating Temperature: -40°C to +125°C
- Mounting Type: Surface Mount
- Packaging: Tape & Reel
- Standard Package Quantity: 2,000 pcs
- RoHS Compliant
- REACH Compliant
- Product Status: Active
Typical Applications
- Automotive Motor Control
- Brushless DC Motor Drives
- Traction and Motor Inverters
- Solenoid Control
- PWM Current Measurement
- Power Supply Current Monitoring
- DC/DC Converters
- Battery Management Systems
- Industrial Motor Drives
- Robotics
- Automotive Power Electronics
- High-Side and Low-Side Current Sensing
The INA240A1QPWRQ1 is well suited for automotive and industrial systems requiring high-accuracy bidirectional current measurement, wide common-mode voltage capability and strong PWM transient rejection.
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