Analog Devices Inc./Maxim Integrated MAX9100ESA+

Overview

MAX9100ESA+ from Analog Devices is a micropower, single-supply comparator with push-pull CMOS output, optimized for battery-powered systems operating from 1.0V to 5.5V supply. It delivers 5μA quiescent current, 4μs propagation delay, rail-to-rail output swing (≤180mV drop at 5mA), and input common-mode range extending to the negative rail - enabling full utilization of low-voltage battery headroom in portable instrumentation and sensor interfaces.

For engineers reviewing the MAX9100ESA+ datasheet, MAX9100ESA+ pinout, MAX9100ESA+ application, or MAX9100ESA+ equivalent, key selection criteria include ultra-low 1.0V operation, guaranteed rail-to-rail output drive up to 5mA, absence of output phase reversal under overdrive, and compatibility with mixed-voltage logic-level translation circuits requiring precise threshold control and minimal power overhead.

Technical Context

The MAX9100ESA+ employs a BiCMOS input stage with differential pair topology enabling rail-to-rail input operation down to 0V and up to VCC − 0.2V, while maintaining ±10mV max input offset voltage across −40°C to +85°C. Its push-pull output stage uses large internal CMOS drivers to sustain rail-to-rail swing under 5mA load without external components.

Propagation delay remains stable across supply voltages (3.3μs at 1.0V, 3.4μs at 5.0V) and temperature, with no output phase reversal when inputs are overdriven beyond common-mode limits - critical for reliable sensing in noisy, low-voltage environments like single-cell medical monitors or wearables.

Key Specifications

Pinout & Package

MAX9100ESA+ is housed in an 8-pin plastic SO (SOIC-8) package with standard 1.27mm pitch, footprint code S8-2, and RoHS-compliant lead-free finish. The device features two no-connect (N.C.) pins (pins 1, 5, and 8) - only five pins are functional.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3691IDBVR and MAX9062ASA+, the MAX9100ESA+ uniquely balances true 1.0V operation, 5μA ICC, and 4μs delay in a single comparator - making it irreplaceable for legacy single-cell battery systems where voltage headroom is non-negotiable and layout space precludes dual-channel integration.

Availability

MAX9100ESA+ is available at Aetrix Electronics and suitable for medical wearable sensor interfaces, single-cell battery monitors, industrial proximity sensor nodes, and IoT environmental data loggers requiring stable component supply across extended production lifecycles.

Supply support for MAX9100ESA+ 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 since 1965.

The MAX9100ESA+ belongs to Analog Devices' micropower comparator product line, engineered specifically for ultra-low-voltage, battery-critical applications where 1.0V operation, sub-10μA current, and rail-to-rail functionality are mandatory design requirements.

FAQ

What is the minimum operating voltage for the MAX9100ESA+?

The MAX9100ESA+ is fully specified to operate down to 1.0V - a key differentiator among micropower comparators. At this voltage, it maintains functional rail-to-rail input range, 5μA quiescent current, and 3.3μs propagation delay. This enables direct interfacing with aging alkaline or primary lithium cells without voltage boosting, which is essential for long-life portable instrumentation where every millivolt of battery headroom matters. The MAX9100ESA+ datasheet guarantees performance across the full −40°C to +85°C range at 1.0V.

Does the MAX9100ESA+ have internal hysteresis, and how does it affect threshold stability?

Yes, the MAX9100ESA+ includes 2mV of internal hysteresis (±1mV around trip point), explicitly documented in its Electrical Characteristics table. This built-in hysteresis raises the upper threshold and lowers the lower threshold to prevent multiple output transitions when input signals cross the decision point slowly or with noise - a common issue in sensor monitoring and battery voltage detection. Unlike external hysteresis networks, this feature requires no additional resistors and remains stable across temperature and supply voltage, ensuring consistent noise immunity in the MAX9100ESA+ without design overhead.

Can the MAX9100ESA+ drive a 5mA load while maintaining rail-to-rail output swing?

Yes - the MAX9100ESA+ push-pull output is characterized to deliver ≤180mV voltage drop at 5mA sink or source current across its full 1.0V–5.5V supply range. At 1.0V supply, VOL is ≤75mV and VOH is ≤75mV (measured at 0.1mA), while at 5.0V, VOL is ≤180mV and VOH is ≤180mV (at 5mA). This verified drive strength means the MAX9100ESA+ can directly interface with standard logic families (e.g., 1.8V, 3.3V, or 5V CMOS inputs) without external buffers or level shifters, simplifying BOM and layout in compact portable designs.

Is the MAX9100ESA+ pin-compatible with the MAX9101ESA+?

No - although both share the same SO-8 package footprint and pin numbering, the MAX9100ESA+ has a push-pull output (pin 6 actively drives high and low), whereas the MAX9101ESA+ has an open-drain output (pin 6 only sinks current and requires an external pull-up). Swapping them without circuit modification will cause logic failure: the MAX9101ESA+ cannot drive high without a pull-up resistor, and the MAX9100ESA+ will conflict with wired-OR configurations designed for open-drain use. Their functional differences are fundamental, not packaging-related.

What is the input common-mode voltage range of the MAX9100ESA+?

The MAX9100ESA+ input common-mode voltage range is specified from 0V to VCC − 0.2V across −40°C to +85°C, enabling true rail-to-rail input operation relative to ground. This allows direct connection of sensors, resistive dividers, or battery terminals without level-shifting circuitry - for example, monitoring a 1.2V battery with a 0.6V reference applied to IN− while IN+ connects to the battery anode. Operation up to VCC is possible with degraded parameters (e.g., increased bias current), but the guaranteed range ensures consistent accuracy and low offset in the MAX9100ESA+ across all valid supply voltages.