Overview
The INA240A3QDRQ1 is an automotive-qualified, voltage-output, current-sense amplifier produced by Texas Instruments. This device is part of the INA240-Q1 family, which is designed to provide high accuracy and reliability in current sensing applications. It features enhanced pulse width modulation (PWM) rejection, allowing for accurate current measurements even in the presence of large common-mode transients. The INA240A3QDRQ1 operates over a wide common-mode voltage range from –4 V to 80 V and is suitable for various automotive and industrial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 2.7 to 5.5 | V |
| Quiescent Current | 1.8 to 2.4 | mA |
| Gain | 100 V/V | |
| Gain Error | ±0.20% | |
| Gain Drift | 2.5 ppm/°C | |
| Offset Voltage | ±25 μV | |
| Offset Drift | 250 nV/°C | |
| Common-Mode Range | –4 V to 80 V | |
| DC CMRR | 132 dB | |
| AC CMRR at 50 kHz | 93 dB | |
| Bandwidth | 400 kHz | |
| Operating Temperature Range | –40°C to +125°C (Grade 1), –40°C to +150°C (Grade 0) | °C |
| Package | 8-pin TSSOP, 8-pin SOIC |
Key Features
- AEC-Q100 Qualified for Automotive Applications: Ensures the device meets stringent automotive standards.
- Enhanced PWM Rejection: Reduces the effect of common-mode transients associated with PWM signals, providing accurate current measurements.
- Excellent CMRR: Offers 132 dB DC CMRR and 93 dB AC CMRR at 50 kHz for high common-mode rejection.
- Wide Common-Mode Range: Operates over a range of –4 V to 80 V, independent of the supply voltage.
- High Accuracy: Features a gain error of ±0.20% and an offset voltage of ±25 μV, with low drift over temperature.
- Functional Safety-Capable: Documentation available to aid in functional safety system design.
- Zero-Drift Topology: Enables current sensing with maximum drops across the shunt as low as 10-mV full-scale.
Applications
- Electronic Power Steering
- Stability and Traction Control
- Motor and Actuator Control
- Solenoid and Valve Control
- Power Management
- Pressure Regulators
- Telecom Equipment
Q & A
- What is the operating voltage range of the INA240A3QDRQ1?
The INA240A3QDRQ1 operates from a single 2.7-V to 5.5-V power supply.
- What is the gain of the INA240A3QDRQ1?
The gain of the INA240A3QDRQ1 is 100 V/V.
- What is the common-mode range of the INA240A3QDRQ1?
The common-mode range is from –4 V to 80 V.
- What is the DC CMRR of the INA240A3QDRQ1?
The DC CMRR is 132 dB.
- What is the maximum quiescent current of the INA240A3QDRQ1?
The maximum quiescent current is 2.4 mA.
- What are the available packages for the INA240A3QDRQ1?
The device is available in 8-pin TSSOP and 8-pin SOIC packages.
- What is the operating temperature range of the INA240A3QDRQ1?
The operating temperature range is –40°C to +125°C (Grade 1) and –40°C to +150°C (Grade 0).
- Does the INA240A3QDRQ1 support functional safety?
Yes, the device is functional safety-capable with available documentation to aid in system design.
- What applications is the INA240A3QDRQ1 suitable for?
The device is suitable for electronic power steering, stability and traction control, motor and actuator control, solenoid and valve control, power management, pressure regulators, and telecom equipment.
- How does the INA240A3QDRQ1 handle PWM signals?
The device features enhanced PWM rejection, which reduces the effect of common-mode transients associated with PWM signals, allowing for accurate current measurements.
