Analog Devices Inc./Maxim Integrated MAX9027EBT+TWG47

Overview

MAX9027EBT+TWG47 from Maxim Integrated is a nanopower, single-channel comparator with push-pull output, no internal reference, and Beyond-the-Rails™ input capability. It operates from +1.8V to +5.5V, draws only 0.6µA supply current at 1.8V, features 4mV internal hysteresis, and delivers rail-to-rail output swing up to ±5mA - ideal for 2-cell battery monitoring in portable medical instruments and telemetry systems.

For engineers reviewing the MAX9027EBT+TWG47 datasheet, MAX9027EBT+TWG47 pinout, MAX9027EBT+TWG47 application, or MAX9027EBT+TWG47 equivalent, key selection criteria include ultra-low quiescent current, guaranteed operation down to 1.8V, push-pull CMOS output drive, input common-mode range extending 200mV beyond rails, and 6-bump UCSP package compatibility with space-constrained PCB layouts.

Technical Context

The MAX9027EBT+TWG47 implements a BiCMOS input stage enabling input voltages from VEE − 0.2V to VCC + 0.2V, with typical input bias current of 0.15nA and 0.3mV offset voltage at +25°C. Its break-before-make push-pull output stage eliminates crowbar current during switching, limiting supply-current surges and reducing power-supply glitches.

Propagation delay is 14µs (high-to-low) and 40µs (low-to-high) at VCC = 5V, with rise/fall times of 1.6µs/0.2µs into 15pF. Internal 4mV hysteresis ensures clean switching with slow-moving or noisy inputs, and the device maintains stable operation across −40°C to +85°C without external hysteresis components.

Key Specifications

Pinout & Package

MAX9027EBT+TWG47 is housed in a 6-bump UCSP (Ultra Compact Silicon Package) measuring 1.0mm × 1.52mm, with bumps on bottom and top-side marking "ADD". The package is RoHS-compliant and optimized for high-density portable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX9028EBT+T, MAX9027EBT+TWG47 provides immediate logic-level compatibility without pull-up resistors; versus TLV3691IDCKR, it delivers guaranteed hysteresis and lower system-level component count for battery monitoring.

Availability

MAX9027EBT+TWG47 is available at Aetrix Electronics and suitable for 2-cell battery monitoring, ultra-low-power telemetry, and medical instrument sensing requiring stable component supply across extended production lifecycles.

Supply support for MAX9027EBT+TWG47 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 precision analog and mixed-signal ICs for power, sensing, and interface applications in industrial, medical, and portable systems.

The MAX9025–MAX9028 family targets ultra-low-power battery-operated systems requiring sub-1µA comparators with rail-enhanced input range and minimal board area - specifically engineered for long-life, space-constrained monitoring functions.

FAQ

What is the supply voltage range supported by MAX9027EBT+TWG47?

MAX9027EBT+TWG47 operates from +1.8V to +5.5V. This range accommodates unregulated 2-cell alkaline (1.8V–3.0V), NiMH (1.8V–2.4V), or single-cell Li-ion (2.7V–3.5V) batteries. Operation is fully specified across this range, including propagation delay, offset voltage, and output swing performance - all guaranteed down to 1.8V per the datasheet Absolute Maximum Ratings and Electrical Characteristics tables.

Does MAX9027EBT+TWG47 include an internal voltage reference?

No, MAX9027EBT+TWG47 does not include an internal voltage reference. It belongs to the "without reference" variant of the MAX9025–MAX9028 family. The MAX9025 and MAX9026 variants integrate a 1.236V ±1% reference; MAX9027EBT+TWG47 omits this block to achieve its 0.6µA supply current. External reference or resistor-divider threshold networks must be used for precise comparisons.

What is the output configuration of MAX9027EBT+TWG47 and how does it affect system design?

MAX9027EBT+TWG47 features a CMOS push-pull output stage capable of sourcing and sinking up to ±5mA. This eliminates the need for external pull-up resistors, reduces standby current in always-on systems, and enables direct interfacing with MCU GPIOs, logic gates, or small loads. Unlike open-drain alternatives (e.g., MAX9028), it cannot perform wire-OR functions or level translation above VCC.

How does the Beyond-the-Rails™ input feature benefit real-world applications?

The Beyond-the-Rails™ input of MAX9027EBT+TWG47 allows common-mode voltages from VEE − 0.2V to VCC + 0.2V. This enables direct sensing of signals at ground (e.g., current-sense amplifier outputs) or near the supply rail (e.g., battery anode monitoring) without external level-shifting circuitry. In practice, this simplifies front-end design, reduces component count, and avoids errors introduced by resistor dividers or op-amp buffers.

What package type and dimensions does MAX9027EBT+TWG47 use?

MAX9027EBT+TWG47 uses a 6-bump UCSP (Ultra Compact Silicon Package) measuring 1.0mm × 1.52mm with bumps on the bottom side and top marking "ADD". It is RoHS-compliant and designed for reflow soldering per JEDEC J-STD-020. The land pattern follows Application Note 1891, and the package offers >70% area reduction versus SOT23-5, making it suitable for wearables, hearing aids, and other miniaturized portable electronics.