Analog Devices Inc./Maxim Integrated MAX1104EUA+T

Overview

MAX1104EUA+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 +5.5V, features ratiometric conversion referenced to VDD, delivers ±1 LSB INL for both converters, supports 6MHz SPI/QSPI/MICROWIRE interface, and enables analog I/O expansion for low-cost microcontrollers in space-constrained industrial sensor interfaces.

For engineers reviewing the MAX1104EUA+T datasheet, MAX1104EUA+T pinout, MAX1104EUA+T application, or MAX1104EUA+T equivalent, this page provides verified electrical specs, functional context for µC interfacing, real-world use cases with design-meaning parameters, and two confirmed alternative parts with documented technical and application differences.

Technical Context

The MAX1104EUA+T implements a SAR ADC with integrated track-and-hold and a double-buffered R-2R DAC, both sharing a single 4-wire serial interface. Its ratiometric architecture ties full-scale range directly to VDD, eliminating need for external reference while maintaining 48dB SINAD (ADC) and 55dB SFDR (DAC).

Control logic accepts an 8-bit configuration word defining converter enable states (ADC/DAC/reference), conversion mode (single/continuous), and address selection - enabling simultaneous or independent operation. Wake-up from full shutdown takes only 3µs (ADC) or 10µs (DAC), supporting rapid duty-cycled sensing.

Key Specifications

Pinout & Package

MAX1104EUA+T is housed in an 8-pin µMAX package (3mm × 3mm, 0.5mm pitch), thermally enhanced with exposed pad (not electrically connected). Pin 1 is marked by dot; pin numbering follows standard counter-clockwise orientation from top-left corner when viewed from top.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1102EUA+, MAX1104EUA+ trades fixed-reference accuracy for universal supply compatibility and ratiometric operation, while ADS7822U abandons DAC integration entirely to deliver higher-resolution ADC performance - making MAX1104EUA+ optimal for balanced, compact, supply-agnostic µC analog expansion.

Availability

MAX1104EUA+T is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable data loggers, microcontroller analog expansion, and power-supply supervision requiring stable component supply across extended temperature ranges.

Supply support for MAX1104EUA+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 MAX1102/MAX1103/MAX1104 family targets cost-sensitive embedded systems needing compact, low-power analog I/O - specifically enabling µC-based designs to omit onboard converters without sacrificing performance.

FAQ

What is the reference voltage configuration for MAX1104EUA+T?

The MAX1104EUA+T uses a ratiometric reference architecture where the ADC and DAC full-scale range is directly tied to VDD. Unlike MAX1102EUA+ (+2V reference) or MAX1103EUA+ (+4V reference), MAX1104EUA+T requires no external reference and maintains proportionality between input/output and supply voltage - simplifying design for variable-supply applications. This is explicitly defined in the datasheet's General Description and Ordering Information sections.

Does MAX1104EUA+T support simultaneous ADC and DAC operation?

Yes, MAX1104EUA+T supports simultaneous operation: a single 8-bit control word with both A0=1 (ADC address) and A1=1 (DAC address) enables concurrent conversion and data loading. The ADC result appears on DOUT while new DAC data is accepted on DIN - verified in the Functional Diagram, Control-Byte Format (Table 1), and timing diagrams (Figures 4a/4b). This enables tight-loop µC control without interleaving delays.

What are the wake-up times from shutdown for MAX1104EUA+T?

From full shutdown (1µA mode), MAX1104EUA+T wakes in 3µs for ADC operation and 10µs for DAC operation - significantly faster than MAX1102/MAX1103 (200µs) due to elimination of internal reference stabilization delay. These values are specified in the Electrical Characteristics table under "ADC Wake-Up Time from Full Shutdown" and "DAC Wake-Up Time from Full Shutdown", and apply across the full +2.7V to +5.5V supply range.

Can MAX1104EUA+T interface directly with both 3.3V and 5V microcontrollers?

Yes, MAX1104EUA+T supports mixed-voltage interfacing: its digital inputs (DIN, SCLK, CS) accept logic thresholds defined as VDD × 0.3 (low) and VDD × 0.7 (high), and output levels (DOUT, OUT) swing rail-to-rail relative to VDD. This allows direct connection to 3.3V or 5V µCs without level shifters - confirmed in the "Logic Inputs and Outputs" section of the Electrical Characteristics table.

What is the maximum achievable ADC throughput rate for MAX1104EUA+T?

The maximum ADC throughput rate for MAX1104EUA+T is 25ksps in continuous conversion mode, achieved using the 6MHz serial clock and optimized timing (36µs conversion time + overhead). This value is explicitly listed in the "Throughput Rate" row of the Electrical Characteristics table and validated in Figure 8's timing diagram - not dependent on external clock sources or oversampling.