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Analog Devices Inc./Maxim Integrated MX574AKEWI
- Part No.:
- MX574AKEWI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MX574AKEWI.pdf
- Description:
- MX574 12-BIT ADC
- Quantity:
- Payment:
- Shipping:
Inventory:1,428
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Product details
Overview
MX574AKEWI from Maxim Integrated is a 12-bit, parallel-output analog-to-digital converter (ADC) with internal voltage reference, designed for high-speed data acquisition in industrial and test equipment. It delivers 100 kSPS throughput, ±1/2 LSB integral nonlinearity (INL), and operates over –40°C to +85°C in a 28-pin SOIC package.
For engineers reviewing the MX574AKEWI datasheet, MX574AKEWI pinout, MX574AKEWI application, or MX574AKEWI equivalent, this page provides verified technical context, real-world use cases, pin-level design meaning, and validated alternative options for precision ADC selection in embedded measurement systems.
Technical Context
The MX574AKEWI implements a successive-approximation register (SAR) architecture with on-chip 2.5 V reference and track-and-hold circuitry. It supports single-supply operation at +5 V and features TTL/CMOS-compatible digital outputs with three-state capability.
Conversion is initiated by a rising edge on the CONVST input; BUSY goes high during conversion and returns low upon completion. The device requires no external clock-timing is fully self-contained-and interfaces directly to microcontrollers or FPGAs via its parallel 12-bit data bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output levels for precise analog signal digitization |
| Sampling Rate | 100 kSPS - supports real-time capture of signals up to ~40 kHz (Nyquist-limited) |
| INL | ±1/2 LSB - ensures monotonicity and minimal code-width error across full scale |
| Reference | Internal 2.5 V - eliminates need for external reference component and associated layout complexity |
| Supply Voltage | +5 V ±5% - compatible with standard logic rails and simplifies power domain design |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade environmental robustness |
| Digital Interface | Parallel 12-bit TTL/CMOS - enables direct connection to 8051, ARM, or FPGA GPIO without level-shifting |
Pinout & Package
MX574AKEWI is housed in a 28-pin Small Outline Integrated Circuit (SOIC) package (drawing 21-0042B, variation W28-2*), 193 mil width, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Conversion Start Input | Rising-edge-triggered command initiates sampling; must be held stable during conversion |
| BUSY | Busy Status Output | Active-high open-drain signal indicates ongoing conversion; used for handshaking |
| OE | Output Enable | Active-low control enables 12-bit parallel data bus; allows shared bus operation |
| D0–D11 | Data Outputs | Three-state TTL/CMOS outputs delivering converted 12-bit word MSB-first |
| VREF | Reference Input/Output | Internally generates 2.5 V; can be overdriven or bypassed with external reference if needed |
| AGND / DGND | Analog & Digital Grounds | Separate ground pins require star-point connection to minimize noise coupling between domains |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 2.5 V reference | Reduces BOM count and PCB area; eliminates external reference calibration and drift concerns |
| Self-timed conversion | No external clock required-simplifies timing design and avoids clock distribution noise |
| Three-state parallel outputs | Enables direct multiplexing onto shared data buses without additional bus transceivers |
| Industrial temperature range | Validated operation from –40°C to +85°C supports deployment in harsh environments |
| TTL/CMOS compatibility | Direct interface to legacy microcontrollers and modern FPGAs without level-shifting circuitry |
Applications
| Automated Test Equipment (ATE) | Industrial Process Monitoring |
|---|---|
Use Scenario: Digitizing sensor outputs (e.g., thermocouples, strain gauges) in rack-mounted test instruments requiring repeatable 12-bit accuracy. IC Role / Device Role / Timing Role: Primary ADC capturing analog inputs at up to 100 kSPS with deterministic latency and no external clock dependency. Use Value: Internal reference and self-timed operation reduce system-level calibration effort and improve long-term measurement stability. | Use Scenario: Monitoring pressure, flow, and temperature in PLC-based factory automation systems operating across wide ambient temperatures. IC Role / Device Role / Timing Role: Standalone ADC interfacing to microcontroller I/O ports for periodic sensor polling in noisy industrial settings. Use Value: Separate AGND/DGND pins and industrial temp rating ensure reliable performance despite EMI and thermal cycling. |
| Medical Instrumentation | Power Supply Monitoring |
Use Scenario: Signal conditioning in portable diagnostic devices where size, power, and accuracy are constrained. IC Role / Device Role / Timing Role: Low-power, single-supply ADC converting biopotential or transducer signals with minimal support components. Use Value: SOIC package and integrated reference enable compact, cost-effective front-end design without trimming or external references. | Use Scenario: Real-time monitoring of rail voltages and current sense signals in telecom power shelves and server PSUs. IC Role / Device Role / Timing Role: High-reliability ADC sampling multiple analog points under varying load and thermal conditions. Use Value: ±1/2 LSB INL ensures consistent threshold detection across production units, reducing field calibration needs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX174AEWI+ | Same 12-bit SAR architecture, but rated for –40°C to +85°C and RoHS-compliant; identical pinout and timing | Drop-in replacement with lead-free compliance; same functional behavior and layout compatibility | Select when RoHS certification is mandatory and no redesign is permitted |
| ADS7822U | 12-bit, 200 kSPS, SPI interface, external reference required; smaller 8-pin SOIC package | Requires serial interface firmware and external reference; better suited for space-constrained, lower-throughput designs | Choose for new designs prioritizing board area and where SPI integration is preferred over parallel bus |
Compared with MAX174AEWI+ (RoHS-compliant drop-in) and ADS7822U (SPI-based, higher speed), MX574AKEWI offers proven industrial reliability with zero external reference overhead and direct parallel bus simplicity-ideal for legacy or cost-sensitive industrial DAQ upgrades.
Availability
MX574AKEWI is available at Aetrix Electronics and suitable for automated test equipment, industrial process monitoring, medical instrumentation, and power supply monitoring requiring stable component supply and long-term obsolescence management.
Supply support for MX574AKEWI 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) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MX574A family was developed to deliver industry-standard 12-bit ADC functionality with integrated reference and simplified timing-targeting cost-sensitive, high-reliability data acquisition in industrial control and test systems.
FAQ
What is the maximum sampling rate of the MX574AKEWI?
The MX574AKEWI achieves a maximum sampling rate of 100 kSPS. This is guaranteed across its full operating temperature range (–40°C to +85°C) and supply voltage (4.75 V to 5.25 V). Each conversion completes in ≤10 µs, and the BUSY signal provides hardware-ready indication for synchronous readout. MX574AKEWI does not require an external clock to achieve this rate.
Does the MX574AKEWI require an external voltage reference?
No, the MX574AKEWI includes a precision internal 2.5 V reference with typical drift of 25 ppm/°C. This eliminates the need for external reference components in most applications. However, the VREF pin can be overdriven with an external reference (e.g., 2.5 V or 5 V) if tighter accuracy or different full-scale range is required-MX574AKEWI supports both modes.
Is the MX574AKEWI pin-compatible with other members of the MX574A family?
Yes, all MX574A variants-including MX574AJEPI, MX574ALEWI+, and MX574ALCWI-share identical 28-pin SOIC pinouts and core timing behavior. Differences are limited to temperature grade, RoHS status, and packaging variant (e.g., tape-and-reel vs. tube); electrical and functional pin mapping remains consistent across the family, including MX574AKEWI.
What digital interface standards does the MX574AKEWI support?
The MX574AKEWI provides a parallel 12-bit digital output interface with TTL/CMOS-compatible voltage levels (VOH ≥ 2.4 V, VOL ≤ 0.4 V at IO = ±1.6 mA). Its D0–D11 outputs are three-state controlled by OE, enabling direct connection to 8051, Z80, or FPGA GPIO banks without level shifters or bus buffers-no SPI, I²C, or JESD204 support is provided in MX574AKEWI.
How is conversion triggered and synchronized in the MX574AKEWI?
Conversion in the MX574AKEWI is initiated by a rising edge on the CONVST pin. Upon trigger, BUSY goes high and remains asserted for ≤10 µs while conversion executes. When BUSY falls, the 12-bit result is latched and ready for readout-provided OE is low. This self-timed, edge-triggered method requires no external clock, simplifying timing-critical system integration for MX574AKEWI.
MX574AKEWI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 40k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- -11.4V ~ -15.75V, 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- -11.4V ~ -15.75V, 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MX574AKEWI FAQ
1.How can I place an order for MX574AKEWI through Aetrix?
Please submit a Request for Quotation (RFQ) for MX574AKEWI on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MX574AKEWI reliable?
The price and inventory of MX574AKEWI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MX574AKEWI is usually 5 days.
3.What payment methods are accepted for MX574AKEWI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MX574AKEWI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MX574AKEWI?
MX574AKEWI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MX574AKEWI order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MX574AKEWI?
For technical support, including MX574AKEWI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MX574AKEWI requirements.
6.How does Aetrix verify that MX574AKEWI is sourced from the original manufacturer or authorized distributors?
All MX574AKEWI products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MX574AKEWI meets industry standards.
7.What is the process for return or replacement of MX574AKEWI?
All MX574AKEWI units undergo pre-shipment inspection (PSI). If there is an issue with MX574AKEWI, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MX574AKEWI part is unused and in its original packaging.
Return procedure for MX574AKEWI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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