Analog Devices Inc./Maxim Integrated MAX40004ANS05+

Overview

The MAX40004ANS05+ from Analog Devices is a nanoPower, push-pull output comparator with factory-trimmed 0.5V internal reference, operating from 1.7V to 5.5V supply and consuming only 500nA typical supply current. It features noninverting input topology, 0.1V–5.5V rail-to-rail input voltage range independent of supply, and 9µs propagation delay (typ) at 100mV overdrive - ideal for battery-critical voltage monitoring in portable medical sensors.

For engineers reviewing the MAX40004ANS05+ datasheet, MAX40004ANS05+ pinout, MAX40004ANS05+ application, or MAX40004ANS05+ equivalent, key selection factors include its ultra-low quiescent current, integrated 0.5V reference accuracy (±15mV over –40°C to +125°C), WLP package footprint (0.73mm × 0.73mm), and push-pull output eliminating external pull-up requirements.

Technical Context

This device implements a BiCMOS input stage enabling input voltages up to 6V (beyond VCC) while maintaining high input impedance even when powered down (VCC = 0V). Its internal temperature-compensated 0.5V reference delivers ±15mV max deviation across –40°C to +125°C, and built-in 8mV hysteresis ensures noise-immune switching without external components.

The push-pull output drives logic-compatible loads directly: VOL ≤ 0.4V at 2mA sink, VOH ≥ VCC – 0.4V at 1mA source. Input bias current remains ≤ 30nA (–40°C to +85°C), and RF immunity is enhanced by on-chip filtering - critical for noisy portable electronics environments.

Key Specifications

Pinout & Package

MAX40004ANS05+ uses a 4-bump wafer-level package (WLP) with 0.73mm × 0.73mm footprint and 0.35mm pitch. The package is RoHS-compliant and marked "X" per ordering guide.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX40004AUK05+, the MAX40004ANS05+ offers 65% smaller footprint and better thermal performance; compared with TLV7031DBVR, it integrates the reference and push-pull drive, reducing component count and design validation effort for battery-constrained systems.

Availability

MAX40004ANS05+ is available at Aetrix Electronics and suitable for portable medical devices, wearable battery monitoring, and automotive cabin sensors requiring stable component supply across extended temperature ranges and ultra-low power budgets.

Supply support for MAX40004ANS05+ 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 MAX4000x family was designed specifically for space- and power-constrained portable electronics, delivering nanoPower operation, ultra-small packaging, and integrated references to simplify voltage monitoring in battery-powered systems.

FAQ

What is the internal reference voltage tolerance of the MAX40004ANS05+ over temperature?

The MAX40004ANS05+ features a factory-trimmed 0.5V internal reference with ±15mV maximum deviation over the full –40°C to +125°C operating range, as specified in the Electrical Characteristics table (page 4 of the datasheet). This corresponds to ±3% accuracy, enabling reliable low-voltage detection without external calibration. The MAX40004ANS05+ maintains this tolerance across all supply voltages from 1.7V to 5.5V.

Does the MAX40004ANS05+ require an external pull-up resistor on the output?

No, the MAX40004ANS05+ does not require an external pull-up resistor because it features a push-pull output stage capable of actively driving both high and low states. This eliminates the need for external components and reduces standby current - a key advantage over open-drain comparators. The MAX40004ANS05+ can directly interface with standard CMOS or TTL inputs across its 1.7V–5.5V supply range.

Can the MAX40004ANS05+ operate with input voltages below its supply voltage?

Yes, the MAX40004ANS05+ supports input voltages as low as 0.1V regardless of supply voltage - including when VCC is 1.7V. Its input stage architecture allows rail-to-rail operation independent of VCC, enabling accurate monitoring of sub-1V signals such as thermistor outputs or low-cell-voltage thresholds. This capability is confirmed in the Electrical Characteristics table under "Input Voltage Range" (VIN = 0.1V to VCC + 0.1V).

What is the propagation delay of the MAX40004ANS05+ at 100mV overdrive?

The MAX40004ANS05+ has a typical propagation delay of 9µs at 100mV overdrive, as stated in the Benefits and Features section and confirmed in the Electrical Characteristics table (page 3). This value applies to both rising and falling edges under push-pull configuration with CL = 20pF and TA = +25°C. Delay increases slightly at temperature extremes but remains ≤ 25µs across –40°C to +125°C per the Typical Operating Characteristics plot (toc06).

Is the MAX40004ANS05+ pin-compatible with other devices in the MAX4000x family?

The MAX40004ANS05+ shares the same 4-bump WLP pinout (A1=OUT, A2=IN, B1=VCC/REF, B2=GND) with all MAX40002–MAX40005 WLP variants, making it mechanically interchangeable within the family. However, functional compatibility depends on reference voltage (0.5V), input polarity (noninverting), and output type (push-pull) - so substitution requires verification of these parameters. The MAX40004ANS05+ is not pin-compatible with SOT23-packaged versions due to differing pin counts and layouts.