Analog Devices Inc./Maxim Integrated MAX1102EUA+T

Overview

The MAX1102EUA+T from Maxim Integrated is an 8-bit dual-function CODEC integrating a successive-approximation ADC and R-2R ladder DAC in a single 8-pin µMAX package. It operates from +2.7V to +3.6V, features ±1 LSB INL for both converters, 48dB SINAD (ADC), 55dB SFDR (DAC), and a 6MHz SPI/QSPI/MICROWIRE-compatible 4-wire serial interface. It is used in microcontroller-based analog I/O expansion where low power and compact size are critical - e.g., battery-powered sensor nodes requiring on-board voltage monitoring and audio playback.

For engineers reviewing the MAX1102EUA+T datasheet, MAX1102EUA+T pinout, MAX1102EUA+T application, or MAX1102EUA+T equivalent, this page delivers verified electrical parameters, functional pin roles, real-world use cases, and validated alternative parts - all specific to the MAX1102EUA+T variant with its +2V internal reference and -40°C to +85°C temperature range.

Technical Context

The MAX1102EUA+T implements a SAR ADC with integrated track-and-hold and a double-buffered R-2R DAC, both sharing a single 6MHz 4-wire serial interface. Its ADC supports AIN or VDD/2 input selection via internal mux for supply monitoring, while the DAC provides rail-to-rail buffered output with 11µs settling time to ±1/2 LSB.

It features three independent shutdown modes (ADC-only, DAC-only, full shutdown at 1µA), a 18µA standby mode with reference active, and fast wake-up times (3µs from full shutdown). The +2V internal reference is factory-trimmed to ±5% initial accuracy with 100ppm/°C drift, enabling stable conversion without external components.

Key Specifications

Pinout & Package

Package: 8-pin µMAX® (3mm × 3mm, 0.5mm pitch), RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-function CODEC applications.

Compared with MAX1102EUA+T, MAX1103EUA+ offers higher reference voltage but mandates 5V operation, while ADS7816U trades integration for speed and flexibility - neither provides the exact combination of +2V reference, 3.3V compatibility, and dual converter functionality in one µMAX package.

Availability

MAX1102EUA+T is available at Aetrix Electronics and suitable for industrial sensor nodes, portable voice recorders, microcontroller analog expansion, power management monitors, and battery-powered telemetry systems requiring stable component supply and long-term manufacturability.

Supply support for MAX1102EUA+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 industrial, medical, and communications applications.

The MAX1102EUA+T belongs to Maxim's legacy low-power CODEC product line, engineered specifically for µC-based systems needing compact, low-cost analog I/O with integrated reference and supply monitoring capability.

FAQ

What is the reference voltage of the MAX1102EUA+T?

The MAX1102EUA+T integrates a factory-trimmed +2.0V internal voltage reference, specified with ±5% initial accuracy and 100ppm/°C temperature coefficient. This reference sets the full-scale range for both the 8-bit ADC and DAC, eliminating the need for external reference components and simplifying board layout. The MAX1102EUA+T does not support external reference override.

Can the MAX1102EUA+T monitor its own supply voltage?

Yes, the MAX1102EUA+T can monitor VDD by configuring the ADC input mux to select VDD/2 via control bit C1. When C1 = 1, the internal resistor divider presents half the supply voltage to the track-and-hold circuit, enabling direct measurement of VDD with ±1 LSB INL accuracy. This feature is unique to MAX1102/MAX1103 and not available on MAX1104.

What are the power consumption modes of the MAX1102EUA+T?

The MAX1102EUA+T supports four power states: active (0.5mA at 25ksps), standby (18µA with reference enabled), ADC-only shutdown, DAC-only shutdown, and full shutdown (1µA). Wake-up from full shutdown takes 3µs, allowing rapid cycling during idle intervals. All modes retain register state except full shutdown, which resets DAC registers to zero on power-on.

Is the MAX1102EUA+T pin-compatible with other devices in the family?

Yes, the MAX1102EUA+T shares identical 8-pin µMAX packaging, pinout, and serial interface protocol with MAX1103EUA+ and MAX1104EUA+. However, supply voltage ranges and reference configurations differ: MAX1102EUA+ requires +2.7V–+3.6V and uses +2V reference, while MAX1103EUA+ requires +4.5V–+5.5V and uses +4V reference. Swapping without adjusting supply or firmware will cause malfunction.

Does the MAX1102EUA+T require external components for basic operation?

No, the MAX1102EUA+T operates fully autonomously with only VDD, GND, and the 4-wire SPI interface (CS, SCLK, DIN, DOUT). It includes an internal conversion clock, track-and-hold, +2V reference, and rail-to-rail DAC output buffer - no external capacitors, resistors, or op-amps are needed for standard 25ksps ADC or DAC operation.