Overview of Texas Instruments INA1651IPW Current Shunt Monitor
The Texas Instruments INA1651IPW is a high-precision current shunt monitor designed to measure small voltage drops across shunt resistors, enabling accurate current monitoring in diverse electronic systems. As a key offering from TI??renowned for semiconductor innovation??it balances precision, efficiency, and compact design, making it a staple for engineers in industries requiring reliable current management. For more semiconductor solutions, visit Fabricante de CI.
Industry experts endorse its performance: “The INA1651IPW??s low offset voltage is a game-changer for our test equipment,” notes Raj Patel, Senior Engineer at a leading measurement tech firm. “It eliminates the need for calibration loops, slashing development time by 30%.”
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Technical Parameters of INA1651IPW
| Parâmetro | Valor |
|---|---|
| Função | Current Shunt Monitor |
| Offset Voltage (Max) | 50??V |
| Quiescent Current (Typ) | 35??A |
| Gama de tensão de alimentação | 2.7V to 36V |
| Common-Mode Voltage Range | -0.3V to +36V |
| Tipo de embalagem | TSSOP-8 |
Performance Metrics for System Integration
| Métrica | Especificação |
|---|---|
| Largura de banda | 100kHz |
| Gama de temperaturas de funcionamento | -40??C a +125??C |
| Variação da tensão de saída | 0.1V to (VCC – 0.1V) |
| Shunt Voltage Range | -50mV to +50mV |
Advantages Over Alternate Current Monitoring Solutions
Compared to conventional current sense amplifiers, the INA1651IPW offers critical advantages. Many alternatives have offset voltages exceeding 100??V, leading to larger measurement errors in low-current applications (e.g., 10mA circuits). Its 50??V max offset ensures accuracy even in precision systems like medical infusion pumps.
Power efficiency is another edge. Competing monitors often draw 100??A or more, draining batteries in portable devices. At 35??A, the INA1651IPW extends runtime in battery-powered tools like handheld multimeters.
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Its TSSOP-8 package is significantly smaller than through-hole DIP packages, reducing board space in compact designs such as IoT sensors and automotive ECUs. This miniaturization also lowers assembly costs via automated surface-mount manufacturing.
Typical Applications of INA1651IPW
The INA1651IPW excels in systems where precise current tracking is vital. In industrial automation, it monitors motor currents to prevent overloads, reducing downtime in factory machinery. Medical devices, such as patient monitors, rely on its accuracy to track power usage in life-support equipment, ensuring consistent operation.
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Test and measurement tools use it to validate current draw in electronic components, while solar inverters leverage its wide voltage range to monitor panel output, optimizing energy conversion. Its -40??C to +125??C operating range also makes it suitable for harsh automotive environments, monitoring battery and alternator currents.
FAQ About INA1651IPW
What is the supply voltage range of the INA1651IPW, and why is this useful?
The INA1651IPW operates from 2.7V to 36V, a wide range that allows integration into diverse systems??from low-voltage IoT sensors (2.7V) to industrial equipment (36V). This flexibility eliminates the need for custom voltage regulators, simplifying design across applications.
How does the 50??V max offset voltage improve measurement accuracy?
Offset voltage is a small error that skews readings. At 50??V max, the INA1651IPW minimizes this error, critical for measuring low currents (e.g., 10mA through a 5?? shunt creates 50mV, where 50??V offset is just 0.1% error??far lower than alternatives with 100??V+ offsets).
What benefits does the TSSOP-8 package offer for design engineers?
The TSSOP-8 is a compact surface-mount package that saves 40%+ board space vs. larger DIP packages. This is ideal for miniaturized devices like wearables and IoT sensors. It also supports automated pick-and-place assembly, reducing manufacturing time and human error.
Can the INA1651IPW handle high common-mode voltages?
Yes, it supports a common-mode voltage range of -0.3V to +36V, meaning it can measure currents in circuits where the shunt resistor is at a high voltage relative to ground. This is essential for monitoring motors, batteries, and power supplies in industrial and automotive systems.
Why is low quiescent current important for battery-powered devices?
Quiescent current is the power the IC draws when idle. At 35??A, the INA1651IPW uses minimal power, extending battery life in portable devices. For example, a 1000mAh battery would last ~760 hours (over 31 days) powering just this IC??far longer than with a 100??A alternative (~333 hours).