Analog Devices Inc./Maxim Integrated MAX1361EUB+T

Overview

MAX1361EUB+T from Maxim Integrated is a 10-bit, 4-channel, I²C-compatible analog-to-digital converter with integrated programmable window comparator, SMBus alert response, and internal 2.048V reference. It operates from 2.7V to 3.6V, consumes 436µA at 150ksps in monitor mode, and supports single-ended or fully differential inputs for autonomous system monitoring in power supplies and servers.

For engineers reviewing the MAX1361EUB+T datasheet, MAX1361EUB+T pinout, MAX1361EUB+T application, or MAX1361EUB+T equivalent, this device delivers verified 10-bit accuracy (±1 LSB INL/DNL), high-speed I²C interface up to 1.7MHz, configurable trip thresholds, and low-power monitor-mode operation without host intervention.

Technical Context

The MAX1361EUB+T implements successive-approximation ADC architecture with fully differential track-and-hold circuitry and on-chip 2.048V voltage reference. Its monitor mode uses digitally programmed upper/lower thresholds to autonomously assert an open-drain INT signal upon analog input violation - independent of host polling.

It supports three I²C modes (Standard, Fast, High-Speed up to 1.7MHz), four slave addresses, and dual clocking (internal oscillator or external SCL). Scan modes leverage on-chip RAM to perform eight conversions on one channel or sequential multi-channel acquisition, reducing interface overhead.

Key Specifications

Pinout & Package

MAX1361EUB+T is housed in a 10-pin µMAX® package (3mm × 3mm, 0.5mm pitch), specified for -40°C to +85°C operation. The package requires standard 0.1µF VDD-to-GND ceramic bypassing and supports lead(Pb)-free/RoHS-compliant assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar system-monitor ADC applications.

Compared with MAX1361EUB+T, MAX1363EUB+ trades lower power and simpler integration for higher resolution, while ADS7822U shifts design burden to external components and firmware - making MAX1361EUB+T optimal for cost-sensitive, low-power, autonomous monitoring where 10-bit fidelity suffices.

Availability

MAX1361EUB+T is available at Aetrix Electronics and suitable for server power supervision, industrial PLC analog input modules, medical patient monitor front-ends, and telecom power management requiring stable component supply and long-term lifecycle support.

Supply support for MAX1361EUB+T 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, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.

The MAX1361EUB+T belongs to Maxim's system monitor ADC product line, engineered specifically for autonomous, low-power, I²C-based voltage/current supervision in space- and energy-constrained embedded systems.

FAQ

What is the maximum sampling rate of the MAX1361EUB+T in monitor mode?

The MAX1361EUB+T achieves a maximum sampling rate of 150ksps in monitor mode - this is its highest conversion throughput when operating autonomously without I²C readback. At this rate, it draws only 436µA from a 2.7V–3.6V supply, enabling high-speed fault detection while maintaining ultra-low power consumption. The 150ksps rate applies specifically to the MAX1361EUB+T variant with its 2.048V internal reference and 2.7–3.6V supply range.

Does the MAX1361EUB+T support differential input configurations?

Yes, the MAX1361EUB+T supports fully differential input operation on two channels (e.g., AIN0–AIN1 and AIN2–AIN3/VREF) via software configuration of the SE/DIF bit. In differential mode, it accepts bipolar input ranges of ±VREF/2 (±1.024V with internal reference) and outputs results in two's complement format. This capability eliminates the need for external instrumentation amplifiers in noise-immune sensor interfaces, and is validated in the MAX1361EUB+T's electrical characteristics table under "Analog Input" conditions.

How does the SMBus alert response function on the MAX1361EUB+T?

The MAX1361EUB+T implements native SMBus alert response: when its programmable window comparator triggers, it pulls the shared INT line low and responds to the SMBus alert command (0x0C) with its 7-bit address. This allows the host controller to identify MAX1361EUB+T as the interrupt source in a single bus transaction - no polling or address scanning required. This behavior is confirmed in the MAX1361EUB+T's Functional Diagram and "SMBus Alert Response" feature listing, and operates independently of I²C clock speed (Standard/Fast/High-Speed modes).

Can the MAX1361EUB+T use an external reference voltage?

Yes, the MAX1361EUB+T supports external reference voltages from 1V to VDD (2.7V–3.6V) applied to the AIN3/VREF pin. When configured via SEL[1:0], this pin functions as a reference input with 40µA typical input current and ≤500Ω recommended source impedance. External referencing enables custom full-scale ranges (e.g., 1.25V for Li-ion cell monitoring) and is explicitly specified in the MAX1361EUB+T's Electrical Characteristics table under "EXTERNAL REFERENCE" parameters.

What is the absolute maximum rating for analog input voltage on the MAX1361EUB+T?

The absolute maximum analog input voltage for MAX1361EUB+T pins AIN0–AIN3/VREF is –0.3V to (VDD + 0.3V), per the Absolute Maximum Ratings table. However, for accurate conversion, inputs must remain within GND – 50mV to VDD + 50mV. Internal ESD protection diodes clamp beyond these limits, but sustained operation outside the recommended range risks measurement error or damage. This specification is measured and guaranteed across the full –40°C to +85°C temperature range for the MAX1361EUB+T.