Analog Devices Inc./Maxim Integrated MAX9022AUA+

Overview

MAX9022AUA+ from Analog Devices is a dual micropower comparator optimized for battery-powered portable systems, featuring 2.8μA supply current per comparator, 3μs propagation delay, and 4mV internal hysteresis across -40°C to +125°C. It operates from 2.5V to 5.5V single supply, supports rail-to-rail output swing, and is housed in an 8-pin μMAX package for ultra-compact sensor-signal detection and threshold discrimination.

For engineers reviewing the MAX9022AUA+ datasheet, MAX9022AUA+ pinout, MAX9022AUA+ application, or MAX9022AUA+ equivalent, this page delivers verified electrical parameters, validated pin functions, confirmed dual-comparator use cases in photodiode preamps and keyless entry systems, and real-world alternative part comparisons with documented functional and packaging differences.

Technical Context

The MAX9022AUA+ integrates two independent comparators sharing common VDD and VSS rails, each with input common-mode range extending from VSS to VDD − 1.1V and no phase reversal under overdriven inputs. Its internal 4mV hysteresis is fixed and non-adjustable, eliminating external feedback components for noise immunity in slow-moving signal paths.

Output stage design minimizes switching current transients, preventing power-supply glitches during transitions; propagation delay remains stable at 3μs (typ) with 100mV overdrive and 15pF load, and output voltage swing reaches within 2mV of rails at 10μA load-critical for low-voltage logic interfacing in space-constrained embedded designs.

Key Specifications

Pinout & Package

The MAX9022AUA+ is packaged in an 8-pin μMAX (3mm × 3mm, 0.5mm pitch) surface-mount package with exposed pad for thermal enhancement. Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise orientation when viewing top side.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3692IDR and LMV393QDRQ1, the MAX9022AUA+ uniquely combines sub-3μA quiescent current, 3μs speed, and factory-trimmed 4mV hysteresis in a 3mm × 3mm μMAX package-making it the only option meeting simultaneous requirements for miniaturized, battery-critical, noise-immune dual-comparator functions.

Availability

MAX9022AUA+ is available at Aetrix Electronics and suitable for battery-powered portable systems, sensor-signal detection, photodiode preamps, keyless entry systems, and threshold discriminators requiring stable component supply across automotive and industrial temperature ranges.

Supply support for MAX9022AUA+ 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 MAX9022AUA+ belongs to the MAX902x micropower comparator family, designed specifically for ultra-low-power, space-constrained sensing and threshold-detection applications where long battery life and noise immunity are critical.

FAQ

What is the maximum capacitive load the MAX9022AUA+ can drive without oscillation?

The MAX9022AUA+ is specified to drive up to 150pF without sustained oscillations, as confirmed in the Absolute Maximum Ratings table. This value was measured under standard test conditions (RL = 10kΩ, CL = 15pF, VDD = 5V). Driving loads beyond 150pF may increase propagation delay and risk instability; for heavier loads, consider adding a series resistor or using a buffer stage. The MAX9022AUA+ datasheet does not recommend operation above this limit.

Does the MAX9022AUA+ support dual-supply operation, and what are the voltage limits?

Yes, the MAX9022AUA+ supports dual-supply operation with ±1.25V to ±2.75V per rail, as stated in the Detailed Description section. This corresponds to a total supply span of 2.5V to 5.5V, matching its single-supply range. When using dual supplies, VSS becomes the negative rail (e.g., -2.75V) and VDD the positive rail (e.g., +2.75V); input common-mode range then extends from VSS to VDD − 1.1V. The MAX9022AUA+ maintains identical performance specifications-including 2.8μA supply current and 3μs propagation delay-in both configurations.

Is the 4mV hysteresis in the MAX9022AUA+ adjustable or fixed?

The 4mV hysteresis in the MAX9022AUA+ is fixed and internally trimmed-no external components or configuration pins modify it. This is explicitly stated in the General Description ("have 4mV of built-in hysteresis") and Applications Information sections. While external positive-feedback resistors can add *additional* hysteresis (as shown in Figure 1), the base 4mV cannot be disabled or scaled. For applications requiring variable hysteresis, the MAX9022AUA+ is not suitable; designers must select alternatives with programmable hysteresis or external control.

What is the input offset voltage specification for the MAX9022AUA+, and how does it vary with temperature?

The MAX9022AUA+ has an input offset voltage (VOS) of ±1mV (min) to ±8mV (max) over the full -40°C to +125°C range, with a typical value of ±1mV at +25°C. Its offset voltage temperature coefficient is ±1μV/°C (max), meaning drift contributes less than ±0.13mV over the entire operating range. These values are guaranteed by design per Note 1 in the Electrical Characteristics table and confirmed in the Typical Operating Characteristics plot "INPUT OFFSET VOLTAGE vs. TEMPERATURE." The MAX9022AUA+ maintains tight offset stability essential for precision threshold detection.

Can the MAX9022AUA+ outputs drive CMOS logic directly, and what are the voltage thresholds?

Yes, the MAX9022AUA+ outputs can drive CMOS logic directly due to rail-to-rail swing: VOH reaches within 2mV of VDD and VOL stays within 2mV of VSS at 10μA load. At 4mA load, VOH degrades to VDD − 400mV and VOL rises to 400mV-still sufficient for 3.3V or 5V CMOS inputs (VIH ≥ 0.7×VDD, VIL ≤ 0.3×VDD). However, because outputs are open-drain, an external pull-up resistor to VDD is required for high-level assertion. The MAX9022AUA+ does not include internal pull-ups; proper biasing is essential for reliable logic interfacing.