Analog Devices Inc./Maxim Integrated MAX4211DETE+T

Overview

MAX4211DETE+T from Maxim Integrated is a full-featured high-side current and power monitor IC with integrated 1.21V bandgap reference, two open-drain comparators, and selectable 16.67V/V current-sense gain. It delivers analog outputs proportional to load current (IOUT) and power (POUT = VSENSE × VIN), operates from +4V to +28V input common-mode voltage, supports +2.7V to +5.5V supply, and enables real-time overpower/overcurrent detection in battery-powered systems.

For engineers reviewing the MAX4211DETE+T datasheet, MAX4211DETE+T pinout, MAX4211DETE+T application, or MAX4211DETE+T equivalent, this device is selected for high-accuracy, high-voltage-side monitoring where ground-path integrity is critical-especially in smart battery packs, circuit-breaker protection, and power-supply instrumentation requiring ±1.5% current/power accuracy and comparator-driven fault response.

Technical Context

The MAX4211DETE+T implements a precision high-side current-sense amplifier cascaded with an analog multiplier that computes POUT = k × VSENSE × VIN, where VIN is derived from an external resistor-divider network (D/E/F variant). Its dual comparators feature independent inputs referenced to the internal 1.21V reference and support overvoltage, overpower, and overcurrent latching via LE and INHIBIT control logic.

Designed for operation up to +28V common-mode voltage at RS+, the device maintains 60–80dB CMRR across IOUT and POUT outputs, achieves 220kHz bandwidth on both outputs, and guarantees ±1.5% total output error over –40°C to +85°C. The 16-pin TQFN package supports thermal performance up to 2000mW at +70°C ambient.

Key Specifications

Pinout & Package

MAX4211DETE+T is housed in a 4mm × 4mm, 16-pin thin QFN package with exposed paddle (EP) for thermal enhancement. Pin numbering follows standard QFN convention, with GND pins distributed for low-impedance return paths and RS+/RS− placed adjacent for minimal sense-resistor loop area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4211AESE+T and INA226AIDGST, the MAX4211DETE+T uniquely combines externally scalable analog power output, dual hardware comparators, and a buffered reference in one 16-pin QFN-enabling self-contained, microcontroller-free protection and instrumentation.

Availability

MAX4211DETE+T is available at Aetrix Electronics and suitable for smart battery packs, overpower circuit breakers, and power-supply instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MAX4211DETE+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 MAX4211 family targets high-side power monitoring in space-constrained, high-reliability systems-delivering integrated current sensing, analog multiplication, and comparator-based fault detection without compromising accuracy or speed.

FAQ

What is the function of the REF pin on the MAX4211DETE+T?

The REF pin on the MAX4211DETE+T provides a buffered 1.21V ±10mV bandgap reference output. This voltage serves as the threshold reference for both comparators and can be used externally to scale resistive dividers for VIN input. It is internally decoupled and capable of sourcing/sinking up to 100µA while maintaining accuracy across –40°C to +85°C. The MAX4211DETE+T relies on this stable reference to ensure consistent comparator trip points and accurate POUT scaling.

How does the MAX4211DETE+T achieve high-side current sensing without disturbing the load ground path?

The MAX4211DETE+T uses a dedicated high-side current-sense amplifier topology with RS+ and RS− inputs referenced to the high-voltage rail-not ground. This allows it to measure current through a sense resistor placed between the power source and load, preserving the load's ground integrity. The device tolerates up to +28V common-mode voltage at RS+, and its input stage rejects common-mode noise with 60–80dB CMRR. No ground-loop interference occurs because the MAX4211DETE+T does not require connection to the load's ground node.

What distinguishes the 'D' variant (MAX4211DETE+T) from other MAX4211 versions like 'A' or 'E'?

The 'D' in MAX4211DETE+T denotes the external resistor-divider architecture for VIN scaling and 16.67V/V current-sense gain. Unlike MAX4211AESE+T (which integrates a 25:1 divider), the MAX4211DETE+T requires external resistors to set VIN range-enabling flexible operation across 0.16V–1.10V input spans. It shares the same 16-pin TQFN package, 220kHz bandwidth, and dual-comparator functionality as other MAX4211 variants but offers superior design adaptability for variable-bus applications.

Can the comparators in the MAX4211DETE+T be configured for latched or auto-reset operation?

Yes-the MAX4211DETE+T comparators support both modes via the LE (latch enable) and INHIBIT pins. When LE is pulsed high, comparator outputs latch their state until cleared by INHIBIT. With LE held low, outputs respond continuously to input changes. This dual-mode flexibility allows the MAX4211DETE+T to serve as either a persistent fault indicator (e.g., for circuit-breaker lockout) or a real-time status monitor (e.g., for dynamic power throttling).

What is the maximum capacitive load the MAX4211DETE+T can drive on IOUT or POUT without instability?

The MAX4211DETE+T guarantees stable operation with up to 450pF capacitive load on IOUT, POUT, or REF outputs-verified across temperature and supply conditions. Driving larger loads may cause peaking or oscillation due to reduced phase margin. For applications requiring >450pF (e.g., long PCB traces or ADC input filtering), a series resistor (10–50Ω) should isolate the output, or an external buffer amplifier must be added. This specification is explicitly tested and guaranteed-not estimated-for the MAX4211DETE+T.