Analog Devices Inc./Maxim Integrated MAX40001ANT12+

Overview

The MAX40001ANT12+ from Maxim Integrated is a nanoPower open-drain comparator with integrated 1.252V precision voltage reference, designed for ultra-low-power portable electronics requiring rail-to-rail input operation, sub-1µA supply current, and operation across -40°C to +125°C. It delivers 2.5mV internal hysteresis, <10µs propagation delay, and supports 1.7V–5.5V supply rails - ideal for battery voltage monitoring in wearables and medical sensors.

For engineers reviewing the MAX40001ANT12+ datasheet, MAX40001ANT12+ pinout, MAX40001ANT12+ application, or MAX40001ANT12+ equivalent, key selection criteria include its open-drain output compatibility with mixed-voltage logic translation, factory-trimmed 1% reference accuracy at +25°C, capacitive load stability up to 100pF on REF, and validated operation in automotive-grade temperature environments.

Technical Context

The MAX40001ANT12+ integrates a bandgap-based voltage reference with ±1% initial accuracy and 15ppm/°C thermal drift over -40°C to +125°C, enabling stable threshold detection without external components. Its input stage supports common-mode voltages from -0.2V to VDD + 0.2V, allowing signals beyond supply rails to be compared reliably.

The open-drain output stage sinks up to 2mA and tolerates pullup voltages up to 5.5V - independent of VDD - supporting level-shifting between 1.8V, 3.3V, and 5V domains. Internal 2.5mV hysteresis eliminates noise-induced oscillation during slow-moving input transitions, eliminating need for external hysteresis in most low-speed detection applications.

Key Specifications

Pinout & Package

MAX40001ANT12+ uses a 6-bump wafer-level package (WLP), outline N60D1+1, with 0.35mm pitch and 1.11mm × 0.76mm footprint. Bump mapping follows standard top-view orientation with bump A1 as Pin 1 (IP).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV4041DPWR and MAX40000ANT12+, the MAX40001ANT12+ uniquely combines open-drain output, WLP packaging, and automotive-grade reference stability - making it the only option that satisfies simultaneous requirements for ultra-small size, multi-rail logic interfacing, and extended temperature operation.

Availability

MAX40001ANT12+ is available at Aetrix Electronics and suitable for battery voltage monitoring, wearable sensor interfaces, automotive fault detection, and portable medical instrumentation requiring stable component supply across long product lifecycles.

Supply support for MAX40001ANT12+ 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 high-performance analog and mixed-signal ICs for power, sensing, and connectivity applications in industrial, automotive, and consumer markets.

The MAX40000/MAX40001 family was engineered specifically for ultra-low-power portable systems where board space, battery life, and temperature resilience are critical - delivering integrated reference comparators with nanoPower consumption and WLP packaging.

FAQ

What is the reference voltage accuracy of the MAX40001ANT12+ over temperature?

The MAX40001ANT12+ features a factory-trimmed 1.252V internal reference with ±1% initial accuracy at +25°C and guaranteed ±2.5% accuracy over the full -40°C to +125°C operating range. This is achieved using a low-drift bandgap core with 15ppm/°C thermal coefficient, enabling stable threshold detection without external calibration in automotive and industrial environments where the MAX40001ANT12+ is deployed.

Can the MAX40001ANT12+ operate from a 1.8V supply?

Yes, the MAX40001ANT12+ operates from 1.7V to 5.5V, fully supporting 1.8V nominal supplies. At 1.8V, it maintains 0.9µA typical supply current, 2.5mV internal hysteresis, and valid operation of both comparator and reference functions. The input common-mode range extends to -0.2V to 2.0V, and the open-drain output can be pulled up to any voltage ≤5.5V - making the MAX40001ANT12+ ideal for ultra-low-voltage energy-harvesting and coin-cell applications.

Does the MAX40001ANT12+ require a bypass capacitor on the REF pin?

No, the MAX40001ANT12+ REF pin is stable with up to 100pF capacitive load and does not require a bypass capacitor in most applications. The internal reference has low output impedance (<10kΩ) and is optimized for direct connection to high-impedance comparator inputs. A 0.1µF ceramic capacitor may be added only if the REF node interfaces with noisy digital circuitry or long traces - but this is not needed for standard use cases involving the MAX40001ANT12+ in portable electronics.

How does the open-drain output of the MAX40001ANT12+ enable level translation?

The MAX40001ANT12+ open-drain output allows the pullup resistor to be connected to a voltage rail different from VDD - e.g., VDD = 5V while pullup = 3.3V - enabling clean 5V-to-3.3V logic translation. Since the output only sinks current, it avoids overvoltage stress on downstream 3.3V inputs. This architecture is used in the MAX40001ANT12+ Typical Application Circuit for UART level shifting, and supports wired-OR configurations where multiple MAX40001ANT12+ outputs share one pullup resistor for fault-detection buses.

Is the MAX40001ANT12+ pin-compatible with other MAX4000x variants?

Yes, all MAX40000/MAX40001 variants in the same package type (WLP or SOT23) share identical pinouts. The MAX40001ANT12+ uses the same 6-bump WLP layout as MAX40000ANT12+, MAX40001ANT16+, and others - with IP, VDD, OUT, GND, REF, and IM mapped identically. This allows drop-in replacement across reference voltage options (1.252V/1.66V/1.94V/2.22V) and output types (open-drain/push-pull) without PCB redesign - a key advantage of the MAX40001ANT12+ family architecture.