Analog Devices Inc./Maxim Integrated MAX9051AESA+T

Overview

MAX9051AESA+T from Analog Devices is a micropower single comparator with integrated 2.500V precision voltage reference, operating from 2.7V to 5.5V supply, consuming only 40µA quiescent current, featuring rail-to-rail inputs/outputs, ±3mV internal hysteresis, and 400ns propagation delay - ideal for precision battery management and low-power sensor threshold detection.

For engineers reviewing the MAX9051AESA+T datasheet, MAX9051AESA+T pinout, MAX9051AESA+T application, or MAX9051AESA+T equivalent, this page delivers verified electrical specs, SO-8 package terminal mapping, A-grade reference accuracy (±0.4% initial, 6ppm/°C tempco), comparator input bias current (1.0pA typ), and real-world use cases in window comparators and IR receivers.

Technical Context

The MAX9051AESA+T integrates a single high-precision comparator and a laser-trimmed series-mode voltage reference on a CMOS die. Its comparator features rail-to-rail input range extending 250mV beyond rails, 0.5mV typical input offset, and push-pull output capable of sourcing/sinking 8mA - unlike the open-drain MAX9038. The reference delivers 2.500V ±0.4% (A grade) with 6ppm/°C tempco and stable operation up to 4.7nF capacitive load.

Internal hysteresis (±3mV) ensures noise-immune switching for slow-moving signals, while the unique output stage minimizes supply current surges during transitions - reducing power-supply glitches and eliminating need for large bypass capacitors in battery-sensitive designs.

Key Specifications

Pinout & Package

MAX9051AESA+T is housed in an 8-pin SO (Small Outline) package with standard 150-mil width and 1.27mm pitch. Pin 1 is marked by a beveled corner or dot; device orientation follows JEDEC MS-012.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX9050AEUK+T and TLV4041IDBVR, MAX9051AESA+T uniquely combines uncommitted IN–, SO-8 mechanical robustness, and 2.500V A-grade reference in a single micropower solution - making it optimal for industrial battery monitors requiring long-term stability and layout flexibility.

Availability

MAX9051AESA+T is available at Aetrix Electronics and suitable for precision battery management, window comparators, IR receivers, and level translators requiring stable component supply across extended temperature ranges (-40°C to +85°C).

Supply support for MAX9051AESA+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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX9038–MAX9053 family was designed specifically for ultra-low-power, single-supply systems needing integrated precision references and comparators - targeting battery-operated instrumentation, portable medical devices, and energy-harvesting sensors.

FAQ

What is the reference voltage accuracy and temperature coefficient of MAX9051AESA+T?

The MAX9051AESA+T features an A-grade 2.500V voltage reference with ±0.4% initial accuracy over temperature and a typical temperature coefficient of 6ppm/°C. This is confirmed in the Electrical Characteristics table for A-grade devices across -40°C to +85°C, enabling stable threshold generation in thermally varying environments without calibration.

Does MAX9051AESA+T have rail-to-rail input and output capability?

Yes, MAX9051AESA+T has rail-to-rail inputs with a common-mode range from VEE – 0.25V to VCC + 0.25V, and a rail-to-rail push-pull output that sources/sinks up to 8mA. This is explicitly stated in the General Description and verified in the Electrical Characteristics table under "Common-Mode Voltage Range" and "Output Voltage High/Low" parameters.

What is the supply current consumption of MAX9051AESA+T at different supply voltages?

MAX9051AESA+T draws 40µA quiescent current at VCC = 2.7V and 45µA at VCC = 5.0V (A-grade specification). These values are specified in the "Supply Current" row of the Electrical Characteristics table and are validated across the full -40°C to +85°C operating range - critical for estimating battery runtime in portable applications.

Can MAX9051AESA+T drive capacitive loads on its REF pin?

Yes, MAX9051AESA+T's reference output is stable with capacitive loads up to 4.7nF, as confirmed in the "Capacitive-Load Stability Range" parameter (CL(VREF) = 0 to 4.7nF). This eliminates need for external compensation and supports direct connection to ADC reference inputs or filtering capacitors without oscillation risk.

What are the key differences between MAX9051AESA+T and MAX9050AESA?

MAX9051AESA+T has an uncommitted IN– input, while MAX9050AESA ties IN– internally to REF. Both share identical 2.500V A-grade reference, 40µA supply current, and SO-8 package. The IN– configuration difference dictates circuit topology: MAX9051AESA+T supports differential or externally biased configurations; MAX9050AESA is optimized for single-ended threshold detection against REF.