Analog Devices Inc./Maxim Integrated MAX9039BEBT+T

Overview

MAX9039BEBT+T from Analog Devices is a micropower single-supply comparator with integrated 1.23V precision voltage reference, designed for battery-operated systems requiring rail-to-rail inputs/outputs, 40μA quiescent current, ±1mV input offset (B grade), and ±3mV internal hysteresis. It operates from 2.5V to 5.5V and delivers 8mA push-pull output drive in a 6-bump UCSP package.

For engineers reviewing the MAX9039BEBT+T datasheet, MAX9039BEBT+T pinout, MAX9039BEBT+T application, or MAX9039BEBT+T equivalent, key selection criteria include its B-grade 1% initial reference accuracy, 100ppm/°C tempco, 400ns propagation delay at 100mV overdrive, and compatibility with capacitive loads up to 4.7nF on the REF pin.

Technical Context

The MAX9039BEBT+T integrates a single comparator and a series-mode voltage reference on a CMOS die. Its comparator features rail-to-rail input stage with common-mode range extending 250mV beyond supply rails and an input bias current of ≤25nA (B grade), enabling high-impedance sensing. The reference uses laser-trimmed thin-film resistors and curvature correction for stable 1.23V output.

Internal ±3mV hysteresis ensures clean switching with slow-moving signals, while the push-pull output stage sinks/sources up to 8mA without external pull-ups. Supply current remains stable at 40μA (typ) across temperature and switching frequencies up to 100kHz, minimizing dynamic power penalties.

Key Specifications

Pinout & Package

MAX9039BEBT+T is housed in a 6-bump UCSP (Ultra Compact Silicon Package) measuring 1.5mm × 1.5mm × 0.6mm, with solder bumps on the bottom side and top mark "AAZ". This wafer-level chip-scale package enables ultra-dense PCB layouts for space-constrained portable electronics.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar comparator + reference applications.

Compared with MAX9038BEBT+T, MAX9039BEBT+T offers identical performance but distinct traceability; versus TLV4041IDBVR, it delivers 72× lower quiescent current, built-in hysteresis, and superior reference stability - making it optimal for long-life, noise-sensitive battery systems.

Availability

MAX9039BEBT+T is available at Aetrix Electronics and suitable for precision battery management, IR receivers, window comparators, and level translators requiring stable component supply across industrial temperature ranges (-40°C to +85°C).

Supply support for MAX9039BEBT+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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.

The MAX9038–MAX9043/MAX9050–MAX9053 family was engineered specifically for ultra-low-power, space-constrained sensing and monitoring applications where integrating comparator and reference functions minimizes footprint and power budget.

FAQ

What is the reference voltage accuracy specification for MAX9039BEBT+T?

The MAX9039BEBT+T features a B-grade 1.23V voltage reference with ±0.4% initial accuracy at +25°C and ±1% maximum over the full -40°C to +85°C operating temperature range. Its temperature coefficient is 100ppm/°C, resulting in a worst-case drift of ±0.87mV across the industrial temperature span.

Does MAX9039BEBT+T support rail-to-rail input operation?

Yes, MAX9039BEBT+T supports rail-to-rail input operation with a common-mode voltage range extending from VEE – 0.25V to VCC + 0.25V. This allows direct interfacing with sensors or signals that swing beyond the supply rails, such as AC-coupled IR receiver outputs or thermistor divider networks.

What is the maximum capacitive load supported on the REF pin of MAX9039BEBT+T?

The REF pin of MAX9039BEBT+T is stable with capacitive loads from 0 to 4.7nF. This allows placement of a local 100nF ceramic capacitor for noise suppression without risking oscillation - a key advantage over references requiring strict ESR or zero-capacitance conditions.

Can MAX9039BEBT+T be used in dual-comparator configurations?

No, MAX9039BEBT+T contains only one comparator. For dual-comparator functionality with the same 1.23V reference, consider the MAX9042 or MAX9043 families. MAX9039BEBT+T is strictly a single-comparator + reference device in UCSP-6 packaging.

What is the typical supply current of MAX9039BEBT+T at 2.7V and 5V operation?

At TA = +25°C, MAX9039BEBT+T draws 40μA typical supply current at both 2.7V and 5V supply voltages. This ultra-low quiescent current remains stable across temperature and switching frequencies up to 100kHz, enabling multi-year battery life in always-on monitoring applications.