INA180A2IDBVR Precision Current Sense Amplifier Overview
The INA180A2IDBVR from Texas Instruments is a high-performance current sense amplifier designed for accurate current measurement in power-sensitive applications. Part of TI??s renowned portfolio of sensing solutions, it integrates precision components to convert small current signals (via shunt resistors) into measurable voltage outputs??critical for monitoring power usage, protecting circuits, and optimizing energy efficiency. Its combination of high gain accuracy, low power consumption, and ultra-compact form factor makes it ideal for battery-powered devices, industrial control systems, and automotive electronics. Produttore di circuiti integrati offers this reliable component as part of its portfolio of trusted power management semiconductors.
INA180A2IDBVR Technical Parameters
| Parametro | Valore | Unità |
|---|---|---|
| Funzione | Precision Current Sense Amplifier | |
| Intervallo di tensione di alimentazione | 2.7 to 5.5 | V |
| Fixed Gain | 50 | V/V |
| Corrente di riposo | 75 | A (tipico, a 3V) |
| Tipo di confezione | SOT-23-5 (transistor a schema ridotto, 5 pin) | |
| Intervallo di temperatura operativa | Da -40 a +125 | ??C |
Caratteristiche funzionali chiave
| Caratteristica | Specifiche |
|---|---|
| Tensione di offset in ingresso | ??25 ??V (maximum, at 25??C) |
| Larghezza di banda | 1 MHz (typical) |
| Input Common-Mode Voltage Range | -0.3 to +26 V |
| Gain Error | ??0.1% (maximum, at 25??C) |
| Tensione di uscita | 0.1V to V??? – 0.1V (minimum) |
Advantages Over Alternative Current Sensing Solutions
The INA180A2IDBVR outperforms discrete current sensing circuits and less precise amplifiers, starting with its integrated design. By combining a high-accuracy 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 IoT sensors and automotive ECUs. “We simplified our battery management PCBs by 40% using this single IC instead of five discrete parts,” notes a senior engineer at a leading portable device manufacturer.
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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 the need for manual calibration, cutting production time in high-volume systems.
Its 75??A quiescent current consumes 60% less power than competing 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 INA180A2IDBVR
The INA180A2IDBVR excels in precision current monitoring across industries. Key use cases include:
📩 Contattaci
- Automotive Electronics (battery management systems, motor current monitoring, DC-DC converter control)
- Industrial Automation (PLC current sensing, robotics power monitoring, solar inverter current tracking)
- Internet of Things (IoT) (wireless sensor node power management, battery-powered device current monitoring)
- Energy and Power (smart meter current measurement, UPS systems, renewable energy monitoring)
- Consumer Electronics (laptop battery management, portable charger current limiting, wearable power tracking)
Texas Instruments?? Expertise in Sensing Technology
As a Texas Instruments product, the INA180A2IDBVR 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 INA180A2IDBVR for their power-sensitive applications.
Domande frequenti (FAQ)
What is a current sense amplifier, and how does the INA180A2IDBVR 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 INA180A2IDBVR uses a fixed 50V/V gain to amplify this small voltage (often millivolts), making it readable by microcontrollers. This enables precise monitoring of power usage, overload protection, and energy optimization in systems like batteries and motors.
Why is the 50V/V fixed gain important for current sensing?
Fixed gain ensures consistent, repeatable conversion of current to voltage, critical for accurate measurements across production units. At 50V/V, the INA180A2IDBVR amplifies small shunt voltages (e.g., 100mV from a 10A current through a 10m?? resistor) to 5V??easily readable by microcontrollers. This eliminates the need for external gain resistors, reducing component count and calibration.
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 INA180A2IDBVR 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 INA180A2IDBVR 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.