Analog Devices Inc./Maxim Integrated MX574ALEWI+

Overview

MX574ALEWI+ from Maxim Integrated is a complete 12-bit successive-approximation analog-to-digital converter (ADC) with integrated buried-zener voltage reference and on-chip clock. It delivers 25μs max conversion time, ±1/2 LSB integral nonlinearity (INL) at +25°C for K/L/T/U grades, 150mW power dissipation at ±15V supplies, and supports ±5V/±10V bipolar or 0–+10V/0–+20V unipolar input ranges via pin strapping. It is used in high-accuracy process control systems requiring stable, self-contained data acquisition.

For engineers reviewing the MX574ALEWI+ datasheet, MX574ALEWI+ pinout, MX574ALEWI+ application, or MX574ALEWI+ equivalent, this page provides verified technical context, real-world interface timing constraints, confirmed analog input configuration options, and validated alternative parts for industrial signal conditioning and embedded data acquisition designs.

Technical Context

The MX574ALEWI+ implements a 12-bit successive approximation register (SAR) architecture with internal 10V buried-zener reference (10ppm/°C TC), 2.5kΩ DAC output impedance, and configurable 8-/12-bit read cycles. Its analog front-end uses fixed 5kΩ (10VIN) or 10kΩ (20VIN) input resistors and supports external offset/gain trimming via REFIN and BIPOFF pins.

It operates in full-control mode (CS/CE/R/C coordinated) or stand-alone mode (R/C only), with three-state outputs controlled by CE, CS, and R/C. Data format is selectable via 12/8 and A0 pins for direct interfacing to 8-, 12-, or 16-bit buses - no external latches or buffers required.

Key Specifications

Pinout & Package

MX574ALEWI+ is supplied in a 28-pin wide-body SOIC (SOIC-W) package with 0.3-inch body width and standard 1.27mm pitch. Pin numbering follows JEDEC MS-013AC, with exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit SAR ADC applications.

Compared with AD7892BRZ-1 and ADS7822U, MX574ALEWI+ offers unique integration of reference, clock, and pin-configurable ranges - reducing system-level component count and calibration complexity in industrial analog input modules where ±15V supplies and robustness are standard.

Availability

MX574ALEWI+ is available at Aetrix Electronics and suitable for industrial process monitoring, test & measurement equipment, motor drive current sensing, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MX574ALEWI+ 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, automotive, and communications markets.

The MX574A series belongs to Maxim's legacy high-accuracy data acquisition product line, engineered specifically for industrial control systems needing self-contained, temperature-stable 12-bit conversion without external support components.

FAQ

What is the maximum operating temperature range for MX574ALEWI+?

The MX574ALEWI+ is rated for −40°C to +85°C operation (industrial grade). This is confirmed by the "MX574AJE/KE/LE" ordering suffix in the datasheet's Operating Temperature Ranges table, which explicitly defines the −40°C to +85°C range for the MX574A family. The 'E' suffix in MX574ALEWI+ matches this grade, ensuring guaranteed performance including ±1/2 LSB INL and 25μs max conversion time across the full range.

Does MX574ALEWI+ require external clock circuitry?

No, MX574ALEWI+ does not require external clock circuitry. It integrates a fully functional on-chip clock generator optimized for its SAR architecture. The datasheet states "complete 12-bit analog-to-digital converters (ADCs) that combine high speed, low-power consumption, and on-chip clock and voltage reference," and specifies internal clock rates of ~600kHz for MX574A - eliminating the need for crystals, oscillators, or timing resistors in standard applications.

Can MX574ALEWI+ interface directly with an 8-bit microcontroller bus?

Yes, MX574ALEWI+ supports direct 8-bit bus interfacing via its 12/8 and A0 pins. When 12/8 = low, it outputs data in left-justified 8-bit bytes: A0 = low reads the 8 MSBs (D11–D4) and A0 = high reads the 4 LSBs plus 4 trailing zeros (D3–D0, 0,0,0,0). This eliminates external latches or data alignment logic, as confirmed in the "Output Data Format" section and Table 2 of the datasheet.

What analog input ranges does MX574ALEWI+ support, and how are they selected?

MX574ALEWI+ supports four pin-strappable analog input ranges: ±5V, ±10V, 0–+10V, and 0–+20V. Selection is achieved by connecting 10VIN or 20VIN to the signal source and grounding AGND, while configuring BIPOFF (tied to REFOUT for bipolar modes) and REFIN (with 50Ω resistor for calibration). These configurations are detailed in Figures 12–15 and Table 3 of the datasheet, with no solder jumpers or external switches required.

Is MX574ALEWI+ RoHS compliant and lead-free?

Yes, MX574ALEWI+ is RoHS compliant and lead-free. The "+" suffix in the part number per Maxim's packaging nomenclature indicates lead-free (Pb-free) finish on the SOIC-W package. This is consistent with Maxim's industry-wide transition to RoHS-compliant manufacturing completed prior to 2010, and the device meets EU Directive 2011/65/EU requirements for hazardous substances.