Analog Devices Inc./Maxim Integrated MAX1361EUB+

Overview

MAX1361EUB+ 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 a single 2.7V–3.6V supply, consumes 436µA at 150ksps in monitor mode, and supports single-ended or fully differential inputs for system-level voltage monitoring in power supplies and servers.

For engineers reviewing the MAX1361EUB+ datasheet, MAX1361EUB+ pinout, MAX1361EUB+ application, or MAX1361EUB+ equivalent, this device delivers autonomous fault detection via interrupt-driven monitor mode, high-speed I²C interface up to 1.7MHz, ±1 LSB INL/DNL accuracy, and configurable trip thresholds - critical for embedded supervisory designs requiring low-power, self-contained analog monitoring without host intervention.

Technical Context

The MAX1361EUB+ implements successive-approximation ADC architecture with fully differential track-and-hold circuitry and an on-chip 2.048V bandgap reference. Its monitor mode uses digitally programmed upper/lower thresholds to autonomously assert the open-drain INT pin when any of the four analog inputs exceeds limits - independent of I²C bus activity.

It supports dual clock modes: internal oscillator (2.8MHz) enabling 150ksps conversion in monitor mode, or external SCL-synchronized operation enabling 94.4ksps throughput while reading results. The I²C interface complies with standard (100kHz), fast (400kHz), and high-speed (1.7MHz) modes, with four selectable slave addresses and SMBus alert response for multi-device interrupt arbitration.

Key Specifications

Pinout & Package

MAX1361EUB+ is housed in a 10-pin µMAX® package (3mm × 3mm, 0.5mm pitch), optimized for space-constrained PCB layouts in server and industrial control applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1361EUB+, the MAX1363EUB+ offers higher resolution but demands firmware updates for register access, while the ADS7822U lacks monitor mode, SMBus alert, and internal reference - increasing system complexity and component count for equivalent functionality.

Availability

MAX1361EUB+ is available at Aetrix Electronics and suitable for server voltage monitoring, industrial power supply supervision, and medical instrumentation requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability.

Supply support for MAX1361EUB+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, computing, and communications markets.

The MAX1361EUB+ belongs to Maxim's system-monitor ADC product line, designed specifically for autonomous, low-power, I²C-based voltage supervision in mission-critical infrastructure where reliability and interrupt-driven responsiveness are paramount.

FAQ

What is the operating temperature range for the MAX1361EUB+?

The MAX1361EUB+ is specified over the extended industrial temperature range of -40°C to +85°C, ensuring reliable operation in demanding environments such as server chassis, industrial PLCs, and telecom power shelves. This rating applies to the full set of electrical specifications including INL, DNL, reference stability, and monitor-mode timing - no derating is required within this range.

Does the MAX1361EUB+ support differential input configurations?

Yes, the MAX1361EUB+ supports fully differential input operation on all four channels via software configuration of the SE/DIF bit in the setup byte. In differential mode, it measures the voltage difference between paired inputs (e.g., AIN0–AIN1), delivering two independent differential channels with ±VREF/2 bipolar range and two's complement output coding - validated in the datasheet's Table 5 and functional diagram.

How does the monitor mode of the MAX1361EUB+ reduce system power consumption?

The MAX1361EUB+ monitor mode reduces system power by eliminating continuous I²C polling: once thresholds are programmed, the device autonomously samples all channels at up to 150ksps and asserts INT only on violation. With AutoShutdown™, supply current drops to <0.5µA between conversions - cutting host MCU wake-up frequency and extending battery life in always-on monitoring nodes.

Can the MAX1361EUB+ use an external reference voltage?

Yes, the MAX1361EUB+ accepts an external reference voltage from 1V to VDD applied to the AIN3/VREF pin when configured via SEL[1:0] bits. The device requires ≤500Ω source impedance and draws up to 40µA; for optimal performance, a 0.1µF bypass capacitor must be placed directly at the AIN3/VREF pin per the datasheet's Typical Operating Circuit.

What I²C slave addresses are supported by the MAX1361EUB+?

The MAX1361EUB+ supports four I²C slave addresses determined by the A0 pin state and internal hardwired bits: 0110100 (A0 = GND), 0110101 (A0 = GND, alternate), 0110110 (A0 = VDD), and 0110111 (A0 = VDD, alternate). These addresses enable up to four MAX1361EUB+ devices on the same I²C bus without address conflict - confirmed in the Ordering Information table.