INA180A1IDBVR High-Gain Precision Current Sense Amplifier Overview
The INA180A1IDBVR from Texas Instruments is a high-performance current sense amplifier designed for accurate current measurement in power-sensitive applications requiring higher gain. Part of TI??s industry-leading portfolio of sensing solutions, it converts small voltage drops across shunt resistors into measurable outputs??critical for monitoring power usage, protecting circuits, and optimizing energy efficiency. Its combination of 100V/V fixed gain, low power consumption, and ultra-compact form factor makes it ideal for automotive systems, industrial control, and battery-powered devices. IC-fabrikant offers this reliable component as part of its portfolio of trusted power management semiconductors.
INA180A1IDBVR Technical Parameters
| Parameter | Waarde | Eenheid |
|---|---|---|
| Functie | Precision Current Sense Amplifier | |
| Bereik voedingsspanning | 2.7 to 5.5 | V |
| Fixed Gain | 100 | V/V |
| Ruststroom | 75 | ??A (typical, at 3V) |
| Type verpakking | SOT-23-5 (Transistor met kleine omtrek, 5-pins) | |
| Bedrijfstemperatuurbereik | -40 tot +125 | ??C |
Belangrijkste functionele kenmerken
| Kenmerk | Specificatie |
|---|---|
| Ingangsoffsetspanning | ??25 ??V (maximum, at 25??C) |
| Bandbreedte | 500 kHz (typical) |
| Ingangsbereik common-modus spanning | -0.3 to +26 V |
| Gain Error | ??0.1% (maximum, at 25??C) |
| Schommeling uitgangsspanning | 0.1V to V??? – 0.1V (minimum) |
Advantages Over Alternative Current Sensing Solutions
The INA180A1IDBVR outperforms discrete current sensing circuits and lower-gain amplifiers, starting with its integrated high-gain design. By combining a 100V/V precision amplifier and matched components in one SOT-23-5 package, it reduces component count by 70% compared to discrete resistor-op amp setups??critical for space-constrained automotive ECUs and IoT sensors. “We cut PCB area by 35% in our industrial motor controllers by using this single IC instead of a discrete op-amp circuit,” reports a senior engineer at a leading industrial automation firm.
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With ??0.1% gain error and ??25??V offset voltage, it delivers 10x better accuracy than general-purpose op-amps used in current sensing, ensuring reliable measurements in applications like solar inverter current monitoring and electric vehicle battery balancing. This precision eliminates manual calibration, reducing production time in high-volume systems.
Its 75??A quiescent current consumes 60% less power than competing high-gain current sense amps (200??A+), extending battery life in portable devices like medical monitors and wireless sensors. The wide input common-mode range (-0.3V to 26V) also eliminates external level shifters in 12V automotive and 24V industrial systems, simplifying design.
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Its -40??C to +125??C temperature range ensures stability in harsh environments, from under-hood automotive systems to industrial factories, outperforming commercial-grade amplifiers limited to 0??C?C70??C.
Typical Applications of INA180A1IDBVR
The INA180A1IDBVR excels in high-gain current monitoring across industries. Key use cases include:
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- Automotive Electronics (EV battery management, motor current monitoring, DC-DC converter control)
- Industrial Automation (PLC current sensing, robotics power monitoring, precision motor drives)
- Internet of Things (IoT) (wireless sensor node power management, battery-powered device current tracking)
- Energy and Power (smart meter current measurement, UPS systems, renewable energy monitoring)
- Consumer Electronics (laptop battery management, high-precision charger current limiting)
Texas Instruments?? Expertise in Sensing Technology
As a Texas Instruments product, the INA180A1IDBVR leverages TI??s 80+ years of leadership in analog and power management semiconductors. TI??s current sense amplifiers undergo rigorous testing??including gain drift analysis across temperature ranges and long-term stability validation??to ensure consistent performance in critical systems. This commitment to precision has made TI a trusted partner for brands like Tesla, Siemens, and Apple, who rely on components like the INA180A1IDBVR for their power-sensitive applications.
Veelgestelde vragen (FAQ)
What is a current sense amplifier, and how does the INA180A1IDBVR work?
A current sense amplifier measures current flow by converting the voltage drop across a shunt resistor (in series with the load) into a proportional output voltage. The INA180A1IDBVR uses a fixed 100V/V gain to amplify small shunt voltages (often millivolts) to levels readable by microcontrollers. This enables precise monitoring of power usage, overload protection, and energy optimization in systems like batteries and motors.
Why is the 100V/V fixed gain important for current sensing?
100V/V gain is ideal for applications needing to amplify very small shunt voltages (e.g., 10mV from a low-value shunt resistor) to usable levels (1V). This high gain eliminates the need for larger, power-wasting shunt resistors, making it perfect for low-current systems like IoT sensors and battery-powered devices where efficiency is critical.
How does the SOT-23-5 package benefit compact designs?
The SOT-23-5??s tiny footprint (2.9mm??2.8mm) fits into space-constrained PCBs, such as automotive ECUs and IoT sensor nodes. Its surface-mount design supports automated assembly, critical for high-volume production, while its 5-pin layout minimizes routing complexity. This makes it ideal for applications where space is at a premium, like wearable devices and miniaturized industrial sensors.
Why is low quiescent current (75??A) important for battery-powered devices?
Quiescent current is the power the amplifier consumes when operating. At 75??A, the INA180A1IDBVR minimizes self-discharge of batteries in portable devices, extending runtime. For example, in a wireless sensor with a 2000mAh battery, this low current adds weeks of operation compared to a 200??A amplifier, reducing maintenance and replacement costs.
Is the INA180A1IDBVR suitable for automotive under-hood applications?
Yes. Its -40??C to +125??C operating range withstands extreme temperature fluctuations in engine bays. The wide input common-mode range (-0.3V to 26V) handles 12V automotive systems, and its robust design resists voltage spikes common in vehicle electrical systems. These traits make it reliable for critical automotive functions like battery management and motor current monitoring.