Analog Devices Inc./Maxim Integrated MAX4211FEUE

Overview

MAX4211FEUE from Maxim Integrated is a full-featured high-side current and power monitor IC integrating a precision current-sense amplifier, 1.21V bandgap reference, and two open-drain comparators. It delivers analog outputs proportional to load current (IOUT) and power (POUT), supports 4V–28V input source voltage, operates from +2.7V to +5.5V supply, and achieves ±1.5% current/power sensing accuracy - used in smart battery chargers and overpower circuit-breaker protection.

For engineers reviewing the MAX4211FEUE datasheet, MAX4211FEUE pinout, MAX4211FEUE application, or MAX4211FEUE equivalent, this page provides verified functional specifications, validated package mapping (16-pin TSSOP), confirmed comparator hysteresis (5mV), real-world settling time (10µs), and design-meaningful gain options (40.96 V/V current gain, 40.96 1/V power gain).

Technical Context

The MAX4211FEUE implements a high-side sensing architecture with differential inputs (RS+, RS−) referenced to load ground, enabling non-intrusive current measurement without disrupting system ground paths. Its internal multiplier computes POUT = VSENSE × VIN (for D/E/F variants) or VSENSE × VRS+ (for A/B/C variants), with the FEUE variant configured for external resistor-divider input (VIN path) and 40.96× current gain.

Two uncommitted comparators accept inputs referenced to the 1.21V internal reference and feature open-drain outputs rated to 28V, supporting direct interface to high-side MOSFET gate drivers in circuit-breaker applications. The device maintains stable operation across −40°C to +85°C with 220kHz IOUT/POUT bandwidth and <10µs settling to 1% for step changes in VSENSE.

Key Specifications

Pinout & Package

MAX4211FEUE is housed in a 16-pin TSSOP package (4.4mm × 5.0mm, 0.65mm pitch) with exposed thermal pad. Pin 1 marked via dot; pin 16 is GND. Thermal pad must be soldered to PCB ground plane for optimal power dissipation and EMI performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side power monitoring applications.

Compared with MAX4211AEUE and MAX4211BEUE, the MAX4211FEUE provides highest current/power gain (40.96×), enabling accurate low-current measurement with smaller sense resistors and tighter power resolution - essential for battery fuel gauging and low-power IoT node monitoring.

Availability

MAX4211FEUE is available at Aetrix Electronics and suitable for smart battery packs, overpower circuit breakers, and short-circuit protection systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MAX4211FEUE 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 and mixed-signal ICs for power, sensing, and interface applications in industrial, automotive, and computing markets.

The MAX4211 product line delivers integrated high-side current and power monitors with on-chip comparators and references - engineered specifically for compact, self-contained fault protection and energy monitoring in space-constrained battery and power systems.

FAQ

What is the function of the LE (Latch Enable) pin on the MAX4211FEUE?

The LE pin on the MAX4211FEUE is an active-high control that latches the state of both comparators upon assertion, holding COUT1 and COUT2 outputs until cleared by INHIBIT or power cycle. This ensures fault events are captured reliably even during brief transients. In the MAX4211FEUE, LE operates independently of the analog outputs IOUT and POUT, which remain continuously updated. Latching behavior is confirmed in the Electrical Characteristics table under "LATCH Setup Time" (3µs).

Does the MAX4211FEUE support external resistor-divider networks for the VIN input?

Yes, the MAX4211FEUE explicitly supports external resistor-divider networks for the VIN input path, as confirmed by its "F" suffix designation in the MAX4211 family nomenclature and Electrical Characteristics section. Unlike A/B/C variants with internal 25:1 dividers, the FEUE variant uses externally applied VIN to the CIN1+/CIN2+ pins, enabling flexible scaling for wide input voltage ranges (e.g., 0.16V–1.10V full-scale). This is validated in the "IN Input Voltage Range" specification (0.16V to 1.10V) and "Power-Sense Amplifier Gain" table entry for MAX4211F.

What is the maximum sink current capability of the COUT1 and COUT2 outputs on the MAX4211FEUE?

The COUT1 and COUT2 outputs on the MAX4211FEUE are open-drain comparators rated to sink up to 1mA while maintaining VOL ≤ 0.6V (typical 0.2V at 1mA), as specified in the "Comparator Output Low Voltage" parameter. They tolerate pull-up voltages up to 28V, making them suitable for direct interface to high-side gate drivers or optocouplers. This sink capability is consistent across all MAX4211 variants including the FEUE, and is confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections of the datasheet.

How does the MAX4211FEUE achieve ±1.5% power-sense accuracy over temperature?

The MAX4211FEUE achieves ±1.5% power-sense accuracy over −40°C to +85°C through factory-trimmed gain and offset calibration of both the current-sense amplifier and multiplier core, combined with a low-drift 1.21V bandgap reference (±10mV over temperature). The "Total POUT Output Error" specification explicitly guarantees ±1.5% at +25°C and ±3.0% over full temperature range for the F variant, with error contributions from gain, offset, and feedthrough tightly controlled in silicon design. This is documented in Note 10 and the POUT Output Error tables for MAX4211F.

Can the REF pin on the MAX4211FEUE be loaded with external circuitry?

Yes, the REF pin on the MAX4211FEUE can drive external circuitry, with guaranteed operation up to 100µA load current while maintaining 1.21V ±10mV accuracy over temperature, as specified in the "Reference Voltage" parameter. The output impedance is low (≤0.5Ω), enabling direct connection to comparator inputs, ADC references, or precision voltage followers. Loading beyond 100µA risks deviation outside the ±1.23V max limit, so design must respect this current limit - confirmed in the Electrical Characteristics table under VREF conditions.