**LT1782CS5#TRMPBF: A 500kHz, 36V Precision High Side Current Sense Amplifier**
In the realm of power management and system monitoring, accurately measuring current is a fundamental requirement. The **LT1782CS5#TRMPBF** from Analog Devices stands out as a specialized integrated circuit designed to perform this critical task with exceptional precision and robustness. This high-side current sense amplifier is engineered to deliver accurate measurements in demanding applications, from automotive systems and industrial controls to telecommunications infrastructure and battery management.
The core function of the LT1782 is to measure the voltage developed across a small-value shunt resistor placed in the power supply path (the high side) of a load. Its **high-side sensing capability** is a significant advantage, as it allows for true ground-referenced load monitoring and provides inherent protection against ground faults. Unlike low-side sensing, it does not disturb the ground path of the load, which is crucial for maintaining system integrity.
A key specification that defines the LT1782's performance is its wide **36V input common-mode voltage range**. This allows it to operate reliably in systems with high voltage rails, such as 24V industrial buses or automotive battery systems, without being damaged by large voltage transients. Furthermore, the device maintains excellent common-mode rejection (CMRR), ensuring that the amplified output signal accurately reflects the small differential voltage across the sense resistor while ignoring large, fluctuating common-mode voltages.
Precision is paramount in current sensing, and the LT1782 excels with its **low 250μV maximum input offset voltage**. This minimal offset translates directly into higher accuracy, especially when measuring very small sense voltages at light load currents. It enables the use of smaller-value, lower-power shunt resistors without sacrificing measurement fidelity, thereby improving overall system efficiency.
The amplifier's **500kHz gain-bandwidth product** ensures a fast response time, making it suitable for applications requiring rapid feedback and control, such as in motor drives or switching power supply regulation. It is available in a fixed gain of 20 V/V (LT1782CS5), simplifying design by minimizing external component count. Its compact SOT-23-5 package is ideal for space-constrained PCB designs.
Operating over an extended industrial temperature range, the LT1782CS5#TRMPBF is built for reliability in harsh environments. Its combination of high voltage operation, precision, and speed makes it an indispensable component for designers who need to monitor system health, optimize power consumption, and ensure operational safety.
**ICGOOODFIND**: The LT1782CS5#TRMPBF is a robust and precise solution for high-side current sensing, offering a high 36V common-mode range, low offset voltage, and a 500kHz bandwidth in a miniature package, making it ideal for a wide array of high-performance applications.
**Keywords**: High-Side Current Sensing, 36V Common-Mode Range, Precision Amplifier, 500kHz Bandwidth, Shunt Resistor Monitoring.
