Analog Devices Inc./Maxim Integrated MAX1104EUA+W

Overview

MAX1104EUA+W 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 6 MHz SPI/QSPI/MICROWIRE interface, and enables analog I/O expansion for low-cost microcontrollers in space-constrained embedded systems.

For engineers reviewing the MAX1104EUA+W datasheet, MAX1104EUA+W pinout, MAX1104EUA+W application, or MAX1104EUA+W equivalent, this page provides verified technical context, real-world design implications of key specs (e.g., VDD-referenced full-scale range, 11 µs DAC settling), confirmed pin functions, and two validated alternative parts with documented functional and application differences.

Technical Context

The MAX1104EUA+W 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 voltage directly to VDD, eliminating need for external reference while maintaining 48 dB SINAD (ADC) and 55 dB SFDR (DAC).

Control logic uses an 8-bit configuration byte with independent enable bits (E0–E2) for ADC, DAC, and reference-though reference is internally tied to VDD and not separately controllable. Wake-up from full shutdown takes only 3 µs for ADC and 10 µs for DAC, enabling rapid duty-cycled operation in battery-sensitive designs.

Key Specifications

Pinout & Package

MAX1104EUA+W is housed in an 8-pin µMAX® package (3.0 mm × 3.0 mm, 0.8 mm height, 0.65 mm pitch), specified for −40°C to +85°C operation and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1102EUA+, MAX1104EUA+W trades fixed-reference accuracy for wider supply compatibility and eliminates power-sense mux complexity; compared with ADS7816U, it integrates DAC functionality and reference at the cost of lower ADC speed-making it optimal for balanced, space-constrained dual-conversion needs.

Availability

MAX1104EUA+W is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable data loggers, microcontroller analog expansion, and audio signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX1104EUA+W 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 and mixed-signal ICs for industrial, medical, and communications applications, emphasizing integration, low power, and robust performance.

The MAX1102/MAX1103/MAX1104 family targets cost-sensitive embedded systems needing compact, low-power analog I/O expansion-specifically enabling microcontrollers without integrated converters to maintain system-level performance through external dual-function CODECs.

FAQ

What is the reference voltage configuration for MAX1104EUA+W?

The MAX1104EUA+W uses a ratiometric reference architecture where the ADC and DAC full-scale range is directly tied to VDD. Unlike MAX1102EUA+ (+2.0V reference) or MAX1103EUA+ (+4.0V reference), MAX1104EUA+W has no internal voltage reference-its conversion accuracy scales with supply voltage, simplifying design in systems where VDD is well-regulated and absolute precision is secondary to relative consistency.

Does MAX1104EUA+W support power-supply monitoring like MAX1102/MAX1103?

No. MAX1104EUA+W does not include the internal multiplexer that selects between AIN and VDD/2-this feature is exclusive to MAX1102EUA+ and MAX1103EUA+. On MAX1104EUA+, Pin 3 (AIN) accepts only the external analog input signal; VDD/2 monitoring must be implemented externally using a resistor divider and separate ADC channel if required.

What is the maximum achievable sampling rate for the ADC in MAX1104EUA+W?

The MAX1104EUA+W ADC achieves a maximum throughput rate of 25 ksps in continuous conversion mode. This is determined by its 36 µs conversion time and interface timing constraints-not by the 6 MHz SCLK, which supports faster data transfer but not faster conversion cycles. At 25 ksps, the device resolves signals up to ~12 kHz per Nyquist criterion.

Can MAX1104EUA+W operate with a 5V microcontroller SPI interface?

Yes. The MAX1104EUA+W digital inputs (DIN, SCLK, CS) accept logic levels compatible with both 3.3V and 5V systems regardless of VDD-VIH is defined as VDD × 0.7 and VIL as VDD × 0.3, ensuring reliable communication across supply voltages from +2.7V to +5.5V without external level shifters.

What is the DAC output drive capability of MAX1104EUA+W?

The MAX1104EUA+W DAC output buffer drives loads of ≥10 kΩ in parallel with ≤100 pF while maintaining 11 µs settling to ±1/2 LSB. It delivers 0 V to VDD − 0.1 V swing with 1.2 V/µs slew rate and exhibits 0.05 LSB load regulation from open circuit to 10 kΩ-suitable for driving op-amp inputs, LED drivers, or simple RC filters without external buffering.