Analog Devices Inc./Maxim Integrated MAX1363EUB+T

Overview

MAX1363EUB+T from Analog Devices is a 12-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 133ksps in monitor mode, and supports single-ended or differential inputs for system-level voltage/current supervision in servers and high-reliability power supplies.

For engineers reviewing the MAX1363EUB+T datasheet, MAX1363EUB+T pinout, MAX1363EUB+T application, or MAX1363EUB+T equivalent, key selection criteria include its 12-bit ±1 LSB INL/DNL accuracy, 133ksps monitor-mode throughput without host intervention, SMBus alert identification capability, and 10-pin µMAX package compatibility with space-constrained embedded monitoring designs.

Technical Context

The MAX1363EUB+T implements successive-approximation ADC architecture with fully differential track-and-hold circuitry and on-chip 2.048V reference. Its monitor mode uses hardware-based window comparison against user-programmed upper/lower thresholds, asserting an open-drain INT signal without CPU polling.

It supports three I²C modes-standard (100kHz), fast (400kHz), and high-speed (1.7MHz)-with six selectable slave addresses and clock-stretching during internal-conversion cycles. 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

MAX1363EUB+T is housed in a 10-pin µMAX® package (3mm × 3mm, 0.5mm pitch), optimized for high-density PCB layouts in server management and power-supply telemetry applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1364EUB+, the MAX1363EUB+ offers lower supply voltage compatibility and tighter reference matching for 3.3V systems; compared with ADS7828IPW, it delivers hardware-accelerated fault detection and reduced firmware burden at the cost of SPI-only interface flexibility.

Availability

MAX1363EUB+T is available at Aetrix Electronics and suitable for server voltage supervision, medical power supply monitoring, and industrial PLC I/O modules requiring stable component supply and long-term production continuity.

Supply support for MAX1363EUB+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

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 MAX1363EUB+T belongs to Analog Devices' precision system-monitor ADC product line, designed specifically for autonomous, low-power voltage and current supervision in compute and power infrastructure where deterministic fault response is mandatory.

FAQ

What is the maximum sampling rate of the MAX1363EUB+T in monitor mode?

The MAX1363EUB+T achieves a maximum sampling rate of 133ksps in monitor mode, where conversions occur autonomously without host readback. This rate applies when using the internal clock and assumes no I²C bus activity during monitoring intervals. The MAX1363EUB+T maintains ±1 LSB INL/DNL accuracy at this speed, enabling high-fidelity detection of fast transients on all four analog inputs simultaneously.

Does the MAX1363EUB+T support differential input configurations?

Yes, the MAX1363EUB+T supports fully differential input operation on any two channels (e.g., AIN0–AIN1, AIN2–AIN3), configurable via the SE/DIF bit in the setup byte. In differential mode, the unipolar range is 0 to VREF and bipolar range is ±VREF/2, with output coding in two's complement for bipolar. The MAX1363EUB+T retains ±1 LSB linearity and 70dB SINAD performance in differential mode at 94.4ksps.

How does the SMBus alert response work on the MAX1363EUB+T?

The MAX1363EUB+T responds to SMBus ALERT signals by pulling its INT pin low and holding it asserted until the host reads the alarm-status register. When multiple devices share an interrupt line, the host issues an SMBus alert response command, and the MAX1363EUB+T replies with its 7-bit address (0110100 or 0110101 based on A0), allowing rapid identification without polling. This behavior is enabled by default after power-up and requires no additional configuration.

Can the MAX1363EUB+T operate with an external reference voltage?

Yes, the MAX1363EUB+T accepts an external reference voltage from 1V to VDD applied to the AIN3/VREF pin. When using an external reference, the device disables its internal 2.048V reference and draws up to 40µA from the reference source. For optimal accuracy, the external reference must have ≤500Ω output impedance and be bypassed with a 0.1µF capacitor close to AIN3/VREF. The MAX1363EUB+T maintains full 12-bit performance with external references meeting these specifications.

What is the function of the A0 pin on the MAX1363EUB+T?

The A0 pin on the MAX1363EUB+T sets the least significant bit of the 7-bit I²C slave address. When A0 is tied to GND, the address is 0110100 (0x34); when tied to VDD, it becomes 0110101 (0x35). This allows two MAX1363EUB+T devices to coexist on the same I²C bus without address conflict. The A0 pin has no other function and must be statically pulled high or low-floating is not permitted per datasheet absolute maximum ratings.