Analog Devices Inc./Maxim Integrated MAX4376HAUK/V+T

Overview

MAX4376HAUK/V+T from Maxim Integrated is a single-channel, high-side current-sense amplifier with fixed +100V/V gain, 0–28V input common-mode range independent of supply voltage, ±0.5% typical full-scale accuracy at +25°C, and operation over –40°C to +125°C for automotive applications. It delivers buffered voltage output driving up to 2mA into ground-referenced loads and is used in battery-charger control loops and smart fuel gauges.

For engineers reviewing the MAX4376HAUK/V+T datasheet, MAX4376HAUK/V+T pinout, MAX4376HAUK/V+T application, or MAX4376HAUK/V+T equivalent, key selection criteria include its AEC-Q100 qualification, 2MHz bandwidth at G=100, 1mA typical supply current, and compatibility with deep-discharge battery monitoring where ground-path integrity is critical.

Technical Context

The MAX4376HAUK/V+T implements a precision BiCMOS-based high-side sensing architecture with internal gain-setting resistors and a current-mirror feedback loop. Its input common-mode range (0V to +28V) remains fully functional even when V_RS+ drops below 2V - though high-accuracy operation is specified above +2V - and is decoupled from V_CC (3V to 28V).

It features a buffered rail-to-rail-capable output stage delivering 2mA drive capability, 1µs saturation recovery time, and 400ns/800ns setting time for rising/falling step transitions (6.25mV ↔ 100mV). Total output voltage error is ±0.5% at +25°C and ±5% over full temperature range.

Key Specifications

Pinout & Package

The MAX4376HAUK/V+T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057), optimized for space-constrained PCB layouts in portable and automotive electronics.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side current-sense amplifier applications.

Compared with MAX4376HAUK/V+T, MAX4080TAUA+ offers lower power but no automotive qualification or 100V/V gain option, while INA240A1DGNR provides wider bandwidth and better CMR but sacrifices AEC-Q100 compliance and high-temperature operation.

Availability

MAX4376HAUK/V+T is available at Aetrix Electronics and suitable for automotive battery management, notebook fuel gauging, and battery-charger control applications requiring stable component supply across long production lifecycles.

Supply support for MAX4376HAUK/V+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and computing applications.

The MAX4376 family delivers integrated high-side current sensing with internal gain for compact, accurate, and robust current monitoring in battery-powered and automotive systems.

FAQ

What is the gain configuration of the MAX4376HAUK/V+T?

The MAX4376HAUK/V+T features a fixed +100V/V gain, indicated by the "H" suffix in its part number. This gain is implemented internally using laser-trimmed resistors and does not require external components. It scales the differential sense voltage (V_RS+ − V_RS−) linearly to produce an output voltage of up to 10V for a 100mV input, supporting high-resolution current measurement with low-value shunt resistors. The gain accuracy is ±0.5% at +25°C and ±5% over the full –40°C to +125°C operating range.

Is the MAX4376HAUK/V+T qualified for automotive use?

Yes, the MAX4376HAUK/V+T is AEC-Q100 qualified (Grade 1), as confirmed by the "/V" suffix in its ordering code. It operates reliably from –40°C to +125°C and meets automotive stress-test requirements for temperature cycling, humidity, and mechanical shock. Its 0V to +28V common-mode input range supports battery monitoring during deep discharge, and its 30V absolute maximum ratings on RS+/RS− pins enhance robustness against load-dump transients commonly encountered in vehicle electrical systems.

What package type and footprint does the MAX4376HAUK/V+T use?

The MAX4376HAUK/V+T is supplied in a 5-pin SOT23 package (outline 21-0057, land pattern 90-0174), designated U5+2A in Maxim's package coding. This RoHS-compliant, surface-mount package measures 2.9mm × 1.6mm × 1.1mm and features gull-wing leads compatible with standard reflow soldering processes. Its compact size makes it ideal for space-constrained applications such as notebook computers, smart battery packs, and automotive ECUs where board area is at a premium.

Can the MAX4376HAUK/V+T operate with a 3V supply?

Yes, the MAX4376HAUK/V+T operates with a minimum supply voltage of +3V, as specified in its absolute maximum ratings and electrical characteristics. At V_CC = 3V, the device maintains full functionality across its common-mode input range (0V to +28V), delivers a valid buffered output, and achieves typical supply current of 1mA. Output high voltage is guaranteed to be within 1.2V of V_CC, ensuring compatibility with 3.3V logic interfaces when used with appropriate external conditioning or ADC reference scaling.

What is the maximum capacitive load the MAX4376HAUK/V+T can drive without oscillation?

The MAX4376HAUK/V+T is stable with capacitive loads up to 1000pF, as specified in its Electrical Characteristics table under "Maximum Capacitive Load." This value was verified with no sustained oscillation observed during characterization. For reliable operation, keep load capacitance ≤1000pF and ensure proper PCB layout - minimize trace length between OUT and the destination node, and avoid routing near noisy digital signals. Adding a small series resistor (e.g., 10Ω–50Ω) between OUT and the load capacitor further improves stability in marginal cases.