company blog about MAXIM MAX4376TAUK 1mA Single High-Side Current-Sense Amplifiers With Internal Gain

MAXIM MAX4376TAUK 1mA Single High-Side Current-Sense Amplifiers With Internal Gain

Shenzhen Mingjiada Electronics Co., Ltd., as a renowned supplier of electronic components, now offers the MAXIM MAX4376TAUK high-side current sense amplifier. This precision amplifier utilises a space-saving SOT-23 package with an internal fixed gain, providing an efficient and compact solution for various current monitoring applications.

【MAX4376TAUK Product Description】

The MAXIM MAX4376TAUK is a high-side current sense amplifier housed in a space-saving 5-pin SOT-23 package. It features an internally fixed gain, eliminating the need for external gain-setting resistors. The device delivers ±0.5% typical full-scale accuracy, operates over a supply voltage range of +3V to +28V, consumes only 1mA (typical), and functions stably across the automotive-grade temperature range of -40°C to +125°C.

Its high-side current monitoring technology avoids interference with battery charger ground paths, making it particularly suitable for battery-powered systems. The input common-mode range spans 0 to +28V, independent of the supply voltage, ensuring current detection feedback remains available even when connected to deeply discharged battery packs.

【MAX4376TAUK Specifications】

Amplifier Type: Current Sense

Number of Circuits: 1

Slew Rate: 10 V/µs

-3dB Bandwidth: 2 MHz

Input Bias Current: 800 µA

Supply Current: 1 mA

Supply Voltage Range (Min): 3 V

Supply Voltage Range (Max): 28 V

Operating Temperature: -40°C to 125°C

【MAX4376TAUK Core Product Features】

The MAX4376TAUK is a single-channel, high-side current sense amplifier with the following core characteristics:

High-Precision Measurement: The MAX4376TAUK delivers ±0.5% typical full-scale accuracy, ensuring precise and reliable current measurement. This high precision makes it particularly suitable for systems demanding stringent current monitoring, such as battery fuel gauges and power management systems.

Wide Common-Mode Voltage Range: The MAX4376TAUK features a broad common-mode input range from 0 to +28V, independent of the supply voltage. This capability ensures that current detection feedback remains viable even when connected to deeply discharged battery packs (as low as 0V), offering significant advantages for battery-powered systems.

Internal fixed-gain options: The MAX4376TAUK incorporates a version with a gain of +20V/V, allowing users to configure full-scale current readings by selecting appropriate voltage gain and external sense resistors.

【MAX4376TAUK Operating Principle】

The MAX4376TAUK is a high-side current sense amplifier that monitors load current by measuring the voltage drop across a sense resistor connected in series within the power path.

The primary advantage of high-side sensing is that it does not interfere with the ground path, preserving system ground integrity. This is particularly important for battery-powered systems as it avoids affecting the ground path of the battery charger.

The internal fixed-gain amplifier within the MAX4376TAUK amplifies the small voltage signal across the sense resistor into an easily measurable output voltage. The internally set gain eliminates the need for external gain-setting resistors, simplifying circuit design.

【MAX4376TAUK Applications】

Consumer Electronics: Laptops, mobile phones, PC power meters, smart battery packs.

Battery-Powered Devices: Battery chargers and power management systems in laptops, mobile phones, smart battery packs, and other portable equipment.

Automotive Electronics: Automotive current detection systems, benefiting from its automotive-grade operating temperature range (-40°C to +125°C).

Power Management: Current-limited power supplies, PC battery meters, general-purpose system/board-level current monitoring, and PA bias control.

Industrial Systems: Portable/battery-powered systems and general-purpose current monitoring applications.