Analog Devices Inc./Maxim Integrated MAX40009ANT+

Overview

MAX40009ANT+ from Analog Devices is a single micro-power rail-to-rail input comparator with push-pull output, operating from 1.7V to 5.5V supply and consuming only 12μA typical supply current at +25°C. It delivers 220ns propagation delay (L→H), 0.5mV typical input offset voltage, and integrated 3mV hysteresis - enabling clean switching in battery-powered IR receivers and threshold detectors.

For engineers reviewing the MAX40009ANT+ datasheet, MAX40009ANT+ pinout, MAX40009ANT+ application, or MAX40009ANT+ equivalent, this device is selected for ultra-low-power, high-speed sensing in automotive-grade portable systems where supply glitch immunity, rail-to-rail input range, and shutdown functionality are critical.

Technical Context

The MAX40009ANT+ implements a proprietary output stage that suppresses supply-current surges during switching, eliminating typical comparator supply glitches. Its internal hysteresis (3mV) and rail-to-rail input range (–0.2V to VDD + 0.2V at +25°C) ensure stable operation with slow-moving or noisy signals.

It features active-low shutdown (SHDN), reducing quiescent current to ≤1μA over temperature, and supports full automotive –40°C to +125°C operation. The push-pull output drives loads up to 8mA while delivering rail-to-rail swing - VOL = 0.4V (sinking 8mA at VDD = 3.3V), VOH = VDD – 0.6V (sourcing 8mA at VDD = 3.3V).

Key Specifications

Pinout & Package

MAX40009ANT+ is packaged in a 0.73mm × 1.1mm, 6-bump wafer-level package (WLP) with 0.35mm pitch - optimized for space-constrained PCB layouts in mobile and wearable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3604DBVR and MAX9062AXK+T, the MAX40009ANT+ uniquely combines automotive-grade temperature support, integrated hysteresis, push-pull output, and 12μA supply current in a 0.73mm × 1.1mm WLP - making it optimal for space- and power-constrained automotive and portable sensing nodes.

Availability

MAX40009ANT+ is available at Aetrix Electronics and suitable for portable/battery-powered systems, IR receivers, threshold detectors, and level translators requiring stable component supply across automotive and industrial production cycles.

Supply support for MAX40009ANT+ 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 MAX40009ANT+ belongs to the MAX40008/MAX40009 family of ultra-low-power comparators designed specifically for battery-critical, space-constrained applications demanding rail-to-rail inputs, fast response, and automotive-grade reliability.

FAQ

What is the maximum allowable voltage on the IN+, IN–, or SHDN pins of the MAX40009ANT+?

The MAX40009ANT+ allows input voltages from –0.3V to +6V relative to GND on IN+, IN–, and SHDN pins. This extended range supports interfacing with signals beyond the supply rails - such as sensor outputs or legacy logic families - without clamping diodes or external protection. Always ensure current into any input pin remains below 20mA continuous.

Does the MAX40009ANT+ require an external pull-up resistor on its OUT pin?

No. The MAX40009ANT+ features a push-pull output stage, so it actively drives both high and low states without needing an external pull-up resistor. This differs from the open-drain MAX40008ANT+ variant, which requires a pull-up. The push-pull design simplifies board layout and improves rise/fall time consistency in timing-critical applications using the MAX40009ANT+.

How does the internal hysteresis of the MAX40009ANT+ affect threshold accuracy?

The MAX40009ANT+ integrates 3mV typical hysteresis to prevent oscillation near trip points, but this creates two distinct thresholds: VTRIP+ and VTRIP–, separated by VHYST. For precision threshold detection, the effective trip point is centered at the input offset voltage (±0.5mV typ). Designers must account for this 3mV band when defining acceptable window margins - especially in low-overdrive signal conditions where the MAX40009ANT+'s hysteresis dominates uncertainty.

Can the MAX40009ANT+ operate from a 1.7V supply while maintaining full 220ns propagation delay performance?

Yes. The MAX40009ANT+ is fully specified from 1.7V to 5.5V, and its 220ns propagation delay (L→H, 100mV overdrive) is guaranteed across the entire supply range and temperature span (–40°C to +125°C). At 1.7V, output swing remains rail-to-rail (VOL ≤ 0.4V, VOH ≥ VDD – 0.6V), ensuring interoperability with 1.8V logic families while sustaining timing performance in the MAX40009ANT+.

Is the MAX40009ANT+ pin-compatible with the MAX40008ANT+?

Yes - the MAX40009ANT+ and MAX40008ANT+ share identical 6-bump WLP pinout and footprint (N60D1+1), including identical placement of IN+, IN–, VDD, GND, SHDN, and OUT. However, their output stages differ: MAX40009ANT+ uses push-pull, while MAX40008ANT+ uses open-drain. Swapping them requires verifying load drive requirements and removing or adding pull-up resistors accordingly in the MAX40009ANT+ design.