Analog Devices Inc./Maxim Integrated MAX9119ESA

Overview

MAX9119ESA from Maxim Integrated is a nanopower, rail-to-rail input comparator without internal reference, housed in an SC70-5 package. It operates from +1.6V to +5.5V, draws only 350nA supply current at 25°C, features Beyond-the-Rails™ inputs (VEE −0.2V to VCC +0.2V), and delivers push-pull CMOS output with ±5mA drive capability - ideal for 2-cell battery monitoring in portable medical instruments.

For engineers reviewing the MAX9119ESA datasheet, MAX9119ESA pinout, MAX9119ESA application, or MAX9119ESA equivalent, key selection criteria include ultra-low quiescent current, guaranteed 1.6V operation, input common-mode range extending beyond supply rails, rail-to-rail output swing under 5mA load, and absence of internal reference for flexible threshold design.

Technical Context

The MAX9119ESA uses a break-before-make output stage that minimizes supply-current surges during switching, eliminating typical comparator-induced supply glitches. Its input stage supports differential signals across the full extended common-mode range and includes internal hysteresis (4mV) to prevent oscillation with slow-moving or noisy inputs.

This device lacks an integrated voltage reference, distinguishing it from the MAX9117/MAX9118 variants. Its push-pull output drives both high and low actively, enabling direct interfacing with CMOS logic without external pull-up resistors - unlike open-drain versions (MAX9118/MAX9120).

Key Specifications

Pinout & Package

The MAX9119ESA is supplied in a 5-pin SC70 package (package code X5-1), measuring 2.0mm × 1.25mm × 0.95mm, with gull-wing leads and 0.65mm pitch - optimized for space-constrained portable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3691IDBVR and MAX40002ANA+T, the MAX9119ESA uniquely balances 1.6V operation, 350nA current, and SC70 footprint - making it optimal for long-life, low-voltage battery systems where every nanoamp and millivolt matters.

Availability

MAX9119ESA is available at Aetrix Electronics and suitable for 2-cell battery monitoring, ultra-low-power telemetry, and medical instrument sensing requiring stable component supply across industrial temperature ranges (−40°C to +85°C).

Supply support for MAX9119ESA 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 demanding environments.

The MAX9117–MAX9120 family was engineered specifically for nanopower, rail-extending comparators in battery-constrained portable systems - emphasizing supply current, input range, and glitch-free switching over speed or integration.

FAQ

What is the minimum operating voltage for the MAX9119ESA?

The MAX9119ESA is guaranteed to operate down to +1.6V across the full −40°C to +85°C temperature range. This enables reliable function at the end-of-life voltage of two alkaline cells (~1.8V nominal, ~1.6V depleted), supporting long-term deployment in battery-powered field sensors without voltage regulation.

Does the MAX9119ESA include an internal voltage reference?

No, the MAX9119ESA does not include an internal voltage reference. Unlike the MAX9117/MAX9118 variants, it is designed for applications where the threshold voltage is provided externally - such as via resistor dividers, DAC outputs, or dedicated reference ICs - offering greater flexibility in precision threshold setting.

What output configuration does the MAX9119ESA use?

The MAX9119ESA features a CMOS push-pull output stage that actively sources and sinks current. This eliminates the need for external pull-up resistors, supports rail-to-rail output swing under ±5mA load, and enables direct interfacing with standard CMOS logic families - distinguishing it from open-drain variants like the MAX9120.

Can the MAX9119ESA accept input voltages outside the supply rails?

Yes, the MAX9119ESA supports Beyond-the-Rails™ inputs: its common-mode range extends from VEE −0.2V to VCC +0.2V. This allows direct sensing of signals at ground (e.g., current-sense shunt) or above VCC (e.g., unregulated battery terminals) without external level-shifting components or clamping diodes.

How does the MAX9119ESA minimize supply-line interference during switching?

The MAX9119ESA employs a crowbar-current-free break-before-make output architecture that limits supply-current surges during transitions. This virtually eliminates supply glitches common in other comparators - reducing or eliminating the need for large local bypass capacitors and improving stability in noise-sensitive analog subsystems powered from shared rails.